Thu, 21 Aug 2008 15:07:53 BST CiteULike: Tag resonator http://www.citeulike.org/tag/resonator CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/zhup/article/2627764 <i>Optical Resonators, Vol. 1224, No. 1. (1990), pp. 2-14.</i> New developments in laser resonators Anthony Siegman doi:10.1117/12.18425 Optical Resonators, Vol. 1224, No. 1. (1990), pp. 2-14. 2008-04-03T19:41:39-00:00 1990 Optical Resonators 1224 1 2 14 SPIE pump resonator http://www.citeulike.org/user/stepcoen/article/2759649 <i>Opt. Express, Vol. 16, No. 7. (31 March 2008), pp. 4881-4887.</i><br /><br />We demonstrate parametric wavelength conversion via four-wave mixing using ultra-low peak pump powers of a few milliwatts in a micrometer-scale silicon device. The response time of our device is 100 ps allowing for implementation in high-bandwidth optical communications. At these ultra-low power levels and microscale sizes, it should be possible to realize hundreds of these devices operating simultaneously on a single chip. Ultra-low power parametric frequency conversion in a silicon microring resonator Amy Turner Mark Foster Alexander Gaeta Michal Lipson Opt. Express, Vol. 16, No. 7. (31 March 2008), pp. 4881-4887. 2008-05-06T03:14:11-00:00 2008 Opt. Express 16 7 4881 4887 OSA four-wave-mixing microcavity resonator http://www.citeulike.org/user/stepcoen/article/2759711 <i>Opt. Lett., Vol. 27, No. 19. (1 October 2002), pp. 1669-1671.</i><br /><br />High- Q traveling-wave-resonators can enter a regime in which even minute scattering amplitudes associated with either bulk or surface imperfections can drive the system into the so-called strong modal coupling regime. Resonators that enter this regime have their coupling properties radically altered and can mimic a narrowband reflector. We experimentally confirm recently predicted deviations from criticality in such strongly coupled systems. Observations of resonators that had Q > 10 8 and modal coupling parameters as large as 30 were shown to reflect more than 94% of an incoming optical signal within a narrow bandwidth of 40 MHz. Modal coupling in traveling-wave resonators TJ Kippenberg SM Spillane KJ Vahala Opt. Lett., Vol. 27, No. 19. (1 October 2002), pp. 1669-1671. 2008-05-06T04:18:26-00:00 2002 Opt. Lett. 27 19 1669 1671 OSA microcavity resonator http://www.citeulike.org/user/stepcoen/article/2759706 <i>Physics Letters A, Vol. 137, No. 7-8. (29 May 1989), pp. 393-397.</i><br /><br />The properties of optical resonators with quality-factor Q[greater-or-equal, slanted]108, effective volume of e.m. field localization Veff[approximate]10-9 cm3 and threshold power of optical bistability Wbist[approximate]10-5 W are described. The prospects to reduce Veff and Wbist are discussed. With possible reduction of controlling energy of optical switching down to a single quantum and employment of the monophotonic states of light, the whispering-gallery microresonators can open the way to realize Feynman's quantum-mechanical computer. Quality-factor and nonlinear properties of optical whispering-gallery modes VB Braginsky ML Gorodetsky VS Ilchenko doi:10.1016/0375-9601(89)90912-2 Physics Letters A, Vol. 137, No. 7-8. (29 May 1989), pp. 393-397. 2008-05-06T04:12:45-00:00 1989 Physics Letters A 137 7-8 393 397 microcavity resonator http://www.citeulike.org/user/stepcoen/article/1134257 <i>Nature, Vol. 421, No. 6926. (27 February 2003), pp. 925-928.</i> Ultra-high-Q toroid microcavity on a chip DK Armani TJ Kippenberg SM Spillane KJ Vahala doi:10.1038/nature01371 Nature, Vol. 421, No. 6926. (27 February 2003), pp. 925-928. 2007-03-01T21:48:29-00:00 2003 Nature 421 6926 925 928 microcavity resonator http://www.citeulike.org/user/stepcoen/article/1134256 <i>Nature, Vol. 415, No. 6872. (7 February 2002), pp. 621-623.</i> Ultralow-threshold Raman laser using a spherical dielectric microcavity SM Spillane TJ Kippenberg KJ Vahala doi:10.1038/415621a Nature, Vol. 415, No. 6872. (7 February 2002), pp. 621-623. 2007-03-01T21:48:27-00:00 2002 Nature 415 6872 621 623 microcavity raman resonator http://www.citeulike.org/user/stepcoen/article/2759698 <i>Physical Review Letters, Vol. 56, No. 9. (3 March 1986), 926.</i> Multiorder Stokes Emission from Micrometer-Size Droplets Shi-Xiong Qian Richard Chang doi:10.1103/PhysRevLett.56.926 Physical Review Letters, Vol. 56, No. 9. (3 March 1986), 926. 2008-05-06T04:00:54-00:00 1986 Physical Review Letters 56 9 926 American Physical Society microcavity raman resonator http://www.citeulike.org/user/stepcoen/article/2149818 <i>Nature, Vol. 450, No. 7173., pp. 1214-1217.</i> Optical frequency comb generation from a monolithic microresonator P Del’haye A Schliesser O Arcizet T Wilken R Holzwarth TJ Kippenberg doi:10.1038/nature06401 Nature, Vol. 450, No. 7173., pp. 1214-1217. 2007-12-20T05:53:45-00:00 Nature 0028-0836 450 7173 1214 1217 Nature Publishing Group comb microcavity resonator http://www.citeulike.org/user/stepcoen/article/2759692 <i>Physical Review Letters, Vol. 93, No. 8. (2004), 083904.</i> Kerr-Nonlinearity Optical Parametric Oscillation in an Ultrahigh-Q Toroid Microcavity TJ Kippenberg SM Spillane KJ Vahala doi:10.1103/PhysRevLett.93.083904 Physical Review Letters, Vol. 93, No. 8. (2004), 083904. 2008-05-06T03:52:00-00:00 2004 Physical Review Letters 93 8 083904 American Physical Society microcavity resonator http://www.citeulike.org/user/stepcoen/article/2759685 <i>Opt. Lett., Vol. 28, No. 17. (2003), pp. 1507-1509.</i><br /><br />Cascaded Raman Stokes lasing in an ultrahigh- Q silica microsphere resonator coupled to a tapered fiber is demonstrated and analyzed. With less than 900 μW of pump power near 980 nm, five cascaded Stokes lasing lines are generated. In addition, a threshold power of 56.4 μW for the first-order Stokes lasing is achieved. The Stokes lasing lines exhibit distinct characteristics depending on their order, as predicted by theoretical analysis. Compact, fiber-compatible, cascaded Raman laser Bumki Min Tobias Kippenberg Kerry Vahala Opt. Lett., Vol. 28, No. 17. (2003), pp. 1507-1509. 2008-05-06T03:47:01-00:00 2003 Opt. Lett. 28 17 1507 1509 OSA laser microcavity raman resonator http://www.citeulike.org/user/rodney/article/1074603 <i>Applied Physics Letters, Vol. 88, No. 4. (2006)</i><br /><br />Simple models are presented for estimating viscous damping of fluid (gas or liquid) loaded mechanical resonators. The models apply to beams in flexural modes of vibration, and to thin beams and plates in longitudinal modes of vibration. Predictions of the associated quality factor are compared with measured values for several macroscale and microscale resonators. The scaling of viscous loss with oscillator size is discussed. The minimum detectable mass is estimated for several oscillator designs and it is shown that, for comparably sized devices, longitudinal resonators have the lowest threshold of detection. This minimum detectable mass is proportional to scale to the power 1.75 for all resonator architectures limited by viscous damping, and it is shown that the viscous loss is 220 times larger in water than in air. ©2006 American Institute of Physics Effect of viscous loss on mechanical resonators designed for mass detection Joseph Vignola John Judge Jacek Jarzynski Maxim Zalalutdinov Brian Houston Jeffrey Baldwin doi:10.1063/1.2165186 Applied Physics Letters, Vol. 88, No. 4. (2006) 2007-01-29T15:56:41-00:00 2006 Applied Physics Letters 88 4 AIP detection mass oscillator resonator viscosity http://www.citeulike.org/user/rodney/article/1666241 <i>(5 Jul 2006)</i><br /><br />anomechanical resonators having small mass, high resonance frequency and low damping rate are widely employed as mass detectors. We study the performances of such a detector when the resonator is driven into a region of nonlinear oscillations. We predict theoretically that in this region the system acts as a phase-sensitive mechanical amplifier. This behavior can be exploited to achieve noise squeezing in the output signal when homodyne detection is employed for readout. We show that mass sensitivity of the device in this region may exceed the upper bound imposed by thermomechanical noise upon the sensitivity when operating in the linear region. On the other hand, we show that the high mass sensitivity is accompanied by a slowing down of the response of the system to a change in the mass. Mass Detection with Nonlinear Nanomechanical Resonator Eyal Buks Bernard Yurke (5 Jul 2006) 2007-09-17T15:08:46-00:00 2006 detection mass nems nonlinear resonator http://www.citeulike.org/user/photonic_brainguide/article/2904886 <i>Review of Scientific Instruments, Vol. 78, No. 7. (2007)</i><br /><br />View This Record in Scopus Laser beam quality and pointing measurement with an optical resonator Patrick Kwee Frank Seifert Benno Willke Karsten Danzmann Review of Scientific Instruments, Vol. 78, No. 7. (2007) 2008-06-18T09:59:10-00:00 2007 Review of Scientific Instruments 78 7 AIP analyzer mode resonator ring http://www.citeulike.org/user/photonic_brainguide/article/2904964 <i>Opt. Express, Vol. 11, No. 25. (15 December 2003), pp. 3346-3351.</i><br /><br />The beam quality of large-mode-area fiber amplifiers was investigated at the 10 W power level using a tunable ring cavity, that is also used in the laboratory system of GEO600 as a pre-mode-cleaner for mode filtering. More than 98% of the overall output power were contained within the polarized (200:1) TEM00 mode with an appropriate choice of coiling diameter. With the high sensitivity ring cavity analysis, the beam quality improvement caused by decreasing the coiling diameter was verified, while this could not be seen within conventional M2-measurements. The results are compared with the properties of single-mode fibers. Highly sensitive beam quality measurements on large-mode-area fiber amplifiers Peter Weßels Carsten Fallnich Opt. Express, Vol. 11, No. 25. (15 December 2003), pp. 3346-3351. 2008-06-18T10:04:14-00:00 2003 Opt. Express 11 25 3346 3351 OSA analyzer mode resonator ring http://www.citeulike.org/user/negarehsan/article/2743391 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 54, No. 6. (2006), pp. 2439-2446.</i><br /><br />Several low-profile 250-/spl mu/m-high Ka-band cavity resonators are demonstrated with resonant frequencies near 26 GHz and unloaded quality (Q) factors greater than 400. The air-filled copper cavity resonators are fabricated on a silicon substrate using a photolithographic process. A microrectangular coaxial transmission-line feed is integrated in the same process. Four resonators with different mechanical support structures are demonstrated. The resonators are designed using the finite-element method and simulation of both the resonant frequency and Q factor agree well with measurements. Quasi-planar high-Q millimeter-wave resonators KJ Vanhille DL Fontaine C Nichols DS Filipovic Z Popovic doi:10.1109/TMTT.2006.875794 Microwave Theory and Techniques, IEEE Transactions on, Vol. 54, No. 6. (2006), pp. 2439-2446. 2008-05-01T20:33:52-00:00 2006 Microwave Theory and Techniques, IEEE Transactions on 54 6 2439 2446 rcl resonator http://www.citeulike.org/user/michaelbussmann/article/2443899 <i>(19 April 2006)</i><br /><br />Written from an industrial perspective, Solid-State Laser Engineering discusses in detail the characteristics, design, construction, and performance of solid-state lasers. Emphasis is placed on engineering and practical considerations; phenomenological aspects using models are preferred to abstract mathematical derivations. Since its first edition almost 30 years ago this book has become the standard in the field of solid-state lasers for scientists,engineers and graduate students.</P> <P>This new edition has been extensively revised and updated to account for recent developments in the areas of diode-laser pumping, laser materials and nonlinear crystals. Completely new sections have been added dealing with frequency control, the theory of mode-locking, femto second lasers, high efficiency harmonic generation, passive and acousto-optic Q-switching, semiconductor saturable absorber mirrors (SESAM) and peridically poled nonlinear crystals. Solid-State Laser Engineering (Springer Series in Optical Sciences) Walter Koechner (19 April 2006) 2008-02-28T15:09:55-00:00 2006 Springer amplification chirp cpa damage diode laser mode-locking nonlinear optical oscillator pulse pumping q-switch resonator self-focusing solid-state thermo-optic http://www.citeulike.org/user/michaelbussmann/article/3057219 <i>Nat Phys, Vol. 4, No. 7. (July 2008), pp. 561-564.</i><br /><br />Current research on micromechanical resonators strives for quantum-limited detection of the motion of macroscopic objects. Prerequisite to this goal is the observation of measurement backaction consistent with quantum metrology limits. However, thermal noise currently dominates measurements and precludes ground-state preparation of the resonator. Here, we establish the collective motion of an ultracold atomic gas confined tightly within a Fabry–Perot optical cavity as a system for investigating the quantum mechanics of macroscopic bodies. The cavity-mode structure selects a particular collective vibrational motion that is measured by the cavity's optical properties, actuated by the cavity optical field and subject to backaction by the quantum force fluctuations of this field. Experimentally, we quantify such fluctuations by measuring the cavity-light-induced heating of the intracavity atomic ensemble. These measurements represent the first observation of backaction on a macroscopic mechanical resonator at the standard quantum limit. Observation of quantum-measurement backaction with an ultracold atomic gas Kater Murch Kevin Moore Subhadeep Gupta Dan Stamper-Kurn doi:10.1038/nphys965 Nat Phys, Vol. 4, No. 7. (July 2008), pp. 561-564. 2008-07-29T16:40:26-00:00 2008 Nat Phys 4 7 561 564 Nature Publishing Group action atomic back cooling gas quantum resonator ultracold http://www.citeulike.org/user/MarkEveritt/article/2196860 <i>Magnetics, IEEE Transactions on, Vol. 25, No. 2. (1989), pp. 1362-1365.</i><br /><br />Superconducting resonators at <e1>K</e1>-band frequencies have been developed for different applications in general physics. Niobium pillbox cavities have been built for the one-atom maser experiment by which the interaction of Rydberg atoms with single microwave photons has been investigated. At 21.5 GHz and 1.3 K, quality factors of up to 10 ¹¹ were obtained. Coating of the cavity with Nb₃Sn resulted in quality factors of 6×10⁸ at 4.2 K and 6×10⁹ at 2 K. A superconducting Fabry-Perot resonator consisting of two spherically curved niobium mirrors was also investigated. The quality factor of 1.8×10⁷ measured at 25 GHz and 4.2 K was found to be two orders of magnitude higher than for a corresponding copper resonator. Fabry-Perot resonators can be used for detecting small position changes for one mirror with respect to another caused by gravitational forces. First experiments with copper Fabry-Perot mirrors suspended in a vacuum chamber provided a maximum sensitivity for a gravitational acceleration of one mirror of 4×10 ^-11 m/s². These results are promising for a possible fifth force detector based on a superconducting Fabry-Perot resonator Superconducting microwave resonators for physics experiments N Klein G Muller H Piel J Schurr doi:10.1109/20.92548 Magnetics, IEEE Transactions on, Vol. 25, No. 2. (1989), pp. 1362-1365. 2008-01-05T10:34:41-00:00 1989 Magnetics, IEEE Transactions on 25 2 1362 1365 cavity resonator http://www.citeulike.org/user/hanss/article/970052 <i>Electronics Letters, Vol. 36, No. 4. (2000), pp. 321-322.</i><br /><br />The most basic and generic configuration, which consists of a unidirectional coupling between a ring resonator and a waveguide, is considered. The fundamental working equations required to describe the associated power transfer are derived and the application of this geometry to a variety of optical phenomena is discussed. These phenomena include `add/dropping' of optical beams, add/drop filtering and optical power switching Universal relations for coupling of optical power between microresonators and dielectric waveguides A Yariv Electronics Letters, Vol. 36, No. 4. (2000), pp. 321-322. 2006-12-01T07:53:11-00:00 2000 Electronics Letters 36 4 321 322 resonator ring sabio slot theory waveguide http://www.citeulike.org/user/hanss/article/968744 <i>Opt Lett, Vol. 31, No. 9. (1 May 2006), pp. 1319-1321.</i><br /><br />We have demonstrated a novel sensor architecture based on a liquid-core optical ring-resonator (LCORR) in which a fused silica capillary is utilized to carry the aqueous sample and to act as the ring resonator. The wall thickness of the LCORR is controlled to a few micrometers to expose the whispering gallery mode to the aqueous core. Optical characterization with a water-ethanol mixture shows that the spectral sensitivity of the LCORR sensor is approximately 2.6 nm per refractive index unit. A model based on Mie theory is established to explain the experimental results. The LCORR takes advantage of the high sensitivity, small footprint, and low sample consumption with the ring resonator, as well as the efficient fluidic sample delivery with the capillary, and will open an avenue to future multiplexed sensor array development. Liquid-core optical ring-resonator sensors. IM White H Oveys X Fan Opt Lett, Vol. 31, No. 9. (1 May 2006), pp. 1319-1321. 2006-11-30T13:26:18-00:00 2006 Opt Lett 0146-9592 31 9 1319 1321 biosensing phodye resonator ring http://www.citeulike.org/group/1854/article/1114468 <i>IEEE Trans. Audio, Speech and Language Proc., Vol. 15, No. 3. (2007), pp. 1021-1029.</i><br /><br />We present two physics-based analysis, synthesis, and control systems for synthesizing hand clapping sounds. They both rely on the separation of the sound synthesis and event generation, and both are capable of producing individual hand-claps, or mimicking the asynchronous/synchronized applause of a group of clappers. The synthesis models consist of resonator filters, whose coefficients are derived from experimental measurements. The difference between these systems is mainly in the statistical event generation. While the first system allows an efficient parametric synthesis of large audiences, as well as flocking and synchronization by simple rules, the second one provides parametric extensions for synthesis of various clapping styles and enhanced control strategies. The synthesis and the control models of both systems are implemented as software running in real time at the audio sample rate, and they are available for download at at http://ccrma-www.stanford.edu/software/stk and http://www.acoustics.hut.fi/go/clapd. Synthesis of Hand Clapping Sounds L Peltola C Erkut PR Cook V Välimäki IEEE Trans. Audio, Speech and Language Proc., Vol. 15, No. 3. (2007), pp. 1021-1029. 2007-02-20T14:55:39-00:00 2007 IEEE Trans. Audio, Speech and Language Proc. 15 3 1021 1029 capsas claps physical-modeling resonator sound-source-modeling swarm http://www.citeulike.org/user/freddan/article/1278003 <i>Sensors, 2005 IEEE (2005), 4 pp..</i><br /><br />A thin film thickness excited shear acoustic wave resonator is presented. Utilizing a newly developed reactive sputtering process AlN thin films with inclined c-axis relative to the surface normal with a mean tilt of around 30/spl deg/ are successfully grown. Using the above process, a biosensor consisting of a shear mode thin film bulk acoustic resonator (FBAR) and a microfluidic transport system was fabricated. The biosensor operation in water, glycerol and albumin was characterized. The resonator had a resonance frequency of around 1.2 GHz and a Q value in water of around 150. Results concerning the stability and resolution are also presented. The results demonstrate clearly the potential of FBAR biosensors for the fabrication of highly sensitive low cost biosensors, bioanalytical tools as well as for liquid sensing in general. Shear mode AlN thin film electroacoustic resonator for biosensor applications G Wingqvist J Bjurstrom L Liljeholm I Katardjiev AL Spetz Sensors, 2005 IEEE (2005), 4 pp.. 2007-05-04T21:39:27-00:00 2005 Sensors, 2005 IEEE 4 pp. biosensors resonator http://www.citeulike.org/user/dcastro/article/2762254 <i>Microwave Symposium Digest, 1991., IEEE MTT-S International (1991), pp. 589-592 vol.2.</i><br /><br />A novel microwave optoelectronic mixer was fabricated on semi-insulating GaAs by monolithically integrating Schottky diode photodetectors into a microstrip ring resonator. Resistive mixing occurs when the conductance of the detector is modulated, and parametric amplification occurs when the capacitive reactance of the detector is modulated. The mixer shows very good potential for application in wideband fiber optic systems Resistive mixing and parametric up-conversion of microwave optoelectronic signals in a microstrip ring resonator GK Gopalakrishnan BW Fairchild CL Yeh CS Park K Chang MH Weichold HF Taylor doi:10.1109/MWSYM.1991.147071 Microwave Symposium Digest, 1991., IEEE MTT-S International (1991), pp. 589-592 vol.2. 2008-05-06T18:35:56-00:00 1991 Microwave Symposium Digest, 1991., IEEE MTT-S International 589 592 vol.2 mixer resonator ring http://www.citeulike.org/user/dcastro/article/2776269 <i>Microwave and Wireless Components Letters, IEEE, Vol. 15, No. 3. (2005), pp. 162-164.</i><br /><br />The paper presents a new design of dual-mode dielectric-loaded rectangular cavity filters. The response of the filter is mainly controlled by the location and orientation of the coupling apertures with no intra-cavity coupling. Each dual-mode dielectric-loaded cavity generates and controls one transmission zero which can be placed on either side of the passband. Example filters which demonstrate the soundness of the design technique are presented. New dual-mode dielectric resonator filters S Amari M Bekheit doi:10.1109/LMWC.2005.844210 Microwave and Wireless Components Letters, IEEE, Vol. 15, No. 3. (2005), pp. 162-164. 2008-05-09T16:40:10-00:00 2005 Microwave and Wireless Components Letters, IEEE 15 3 162 164 dual mode resonator http://www.citeulike.org/user/dcastro/article/2836657 <i>Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 27, No. 6. (1979), pp. 846-849.</i><br /><br />An extended theory on rectangular microstrip resonator antennas is presented using the cavity model. Radiation from all four edges of the open cavity is taken into account as well as dielectric and ohmic losses. For a rectangular microstrip antenna excited in its lowest resonance mode, losses, input conductance, and bandwidth are calculated and plotted versus frequency for some different parameters, showing that bandwidths of up to 15 percent (for a voltage standing-wave ratio (VSWR) of less than two) are possible to achieve in the<tex>X</tex>band. Extended analysis of rectangular microstrip resonator antennas A Derneryd A Lind Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 27, No. 6. (1979), pp. 846-849. 2008-05-27T07:08:05-00:00 1979 Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988] 27 6 846 849 antenna microstrip resonator http://www.citeulike.org/user/dcastro/article/2762255 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 36, No. 12. (1988), pp. 1733-1739.</i><br /><br />A microstrip ring resonator circuit loaded with two p-i-n diodes has been developed for use as a switchable filter. By replacing one p-i-n diode with a varactor diode, the switchable filter can be made electronically tunable. Isolation exceeding 20 dB with 9% tuning bandwidth was demonstrated. An analysis based on transmission line theory was used to model both circuits. The analysis includes the effects of diode parasitics, coupling gaps, dispersion, and mounting-gap capacitance. The experimental results agree very well with the theoretical calculation Theoretical and experimental investigation of novel varactor-tuned switchable microstrip ring resonator circuits TS Martin F Wang K Chang doi:10.1109/22.17407 Microwave Theory and Techniques, IEEE Transactions on, Vol. 36, No. 12. (1988), pp. 1733-1739. 2008-05-06T18:35:57-00:00 1988 Microwave Theory and Techniques, IEEE Transactions on 36 12 1733 1739 resonator ring http://www.citeulike.org/user/dcastro/article/2782011 <i>Microwave and Wireless Components Letters, IEEE, Vol. 15, No. 4. (2005), pp. 259-261.</i><br /><br />This letter proposes and fabricates a novel dual-band bandpass filter topology. The proposed topology facilitates the split resonating frequencies of coupled resonator pairs in realizing the dual-band response and introduces transmission zeros for improving the stopband attenuation. The semi-lumped prototype enables the integration of the filter in a multilayer circuit for miniaturized implementation. Finally, a design example fabricated with low temperature co-fired ceramic (LTCC) technology is presented for validating the filter configuration. Dual-band bandpass filter using coupled resonator pairs Cheng-Chung Chen doi:10.1109/LMWC.2005.845735 Microwave and Wireless Components Letters, IEEE, Vol. 15, No. 4. (2005), pp. 259-261. 2008-05-09T23:46:53-00:00 2005 Microwave and Wireless Components Letters, IEEE 15 4 259 261 bandpass dual-band filter resonator http://www.citeulike.org/user/dcastro/article/2762253 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 50, No. 2. (2002), pp. 453-460.</i><br /><br />A transmission-line model is used to extract the equivalent lumped-element circuits for the closed- and open-loop ring resonators. The unloaded Q values of the ring resonators can be calculated from the equivalent lumped elements G, L, and C. Four different configurations of microstrip ring resonators fabricated on low and high dielectric-constant substrates are used to investigate the lumped elements and unloaded Qs. The largest difference between the measured and calculated unloaded Q is 5.7%, which is due to measurement uncertainties and accuracies of the calculation. These simple expressions introduce an easy method for analyzing ring resonators in filters and provide, for the first time, a means of predicting their unloaded Q Equivalent lumped elements G, L, C, and unloaded Q's of closed- and open-loop ring resonators Lung-Hwa Hsieh Kai Chang doi:10.1109/22.982223 Microwave Theory and Techniques, IEEE Transactions on, Vol. 50, No. 2. (2002), pp. 453-460. 2008-05-06T18:35:53-00:00 2002 Microwave Theory and Techniques, IEEE Transactions on 50 2 453 460 lumped resonator ring http://www.citeulike.org/user/dcastro/article/2762251 <i>Electronics Letters, Vol. 30, No. 2. (1994), pp. 148-149.</i><br /><br />Perturbations not affecting the intrinsic resonance of a microstrip ring are introduced to increase the coupling periphery between the feedline and the resonator. Compared to conventional excitation, the authors demonstrate an average improvement of approximately 6 dB in the insertion loss.<<ETX>> Novel excitation schemes for the microstrip ring resonator with lower insertion loss GK Gopalakrishnan K Chang Electronics Letters, Vol. 30, No. 2. (1994), pp. 148-149. 2008-05-06T18:35:49-00:00 1994 Electronics Letters 30 2 148 149 microstrip resonator ring http://www.citeulike.org/user/dcastro/article/1662308 <i>Journal of Electromagnetic Waves and Applications, Vol. 21, No. 12. (2007), pp. 1663-1672.</i> Compact Resonator Filters and Power Dividers Designed with Simplified Meta-Structures Lin Cheng Liu Bao Cui doi:10.1163/156939307781870844 Journal of Electromagnetic Waves and Applications, Vol. 21, No. 12. (2007), pp. 1663-1672. 2007-09-16T04:23:41-00:00 2007 Journal of Electromagnetic Waves and Applications 0920-5071 21 12 1663 1672 VSP, an imprint of Brill compact divider filter metamaterial power resonator http://www.citeulike.org/user/dcastro/article/2776125 <i>Microwave Symposium Digest, 1995., IEEE MTT-S International (1995), pp. 83-86 vol.1.</i><br /><br />Tunable microstrip ring resonator oscillators and filters are described. Two alternative techniques for suppression of unwanted higher order modes are reviewed. The practical oscillator has a tuning bandwidth of nearly 30%, and phase noise better than -90 dBc, 10 kHz from carrier. This is encouraging performance for a compact planar device Microwave oscillators and filters based on microstrip ring resonators DK Paul P Gardner doi:10.1109/MWSYM.1995.406092 Microwave Symposium Digest, 1995., IEEE MTT-S International (1995), pp. 83-86 vol.1. 2008-05-09T15:20:58-00:00 1995 Microwave Symposium Digest, 1995., IEEE MTT-S International 83 86 vol.1 microwave oscillator resonator http://www.citeulike.org/user/dcastro/article/2762101 <i>Antennas and Propagation Society International Symposium, 1978, Vol. 16 (1978), pp. 268-272.</i> Broadband microstrip resonator antennas H Pues J Vandensande A Van de Capelle K Leuven Antennas and Propagation Society International Symposium, 1978, Vol. 16 (1978), pp. 268-272. 2008-05-06T17:19:02-00:00 1978 Antennas and Propagation Society International Symposium, 1978 16 268 272 antennas broadband microstrip resonator http://www.citeulike.org/user/dcastro/article/2776126 <i>Electronics Letters, Vol. 30, No. 21. (1994), pp. 1770-1771.</i><br /><br />A microwave oscillator incorporating a varactor-tuned microstrip ring resonator was developed using a single packaged varactor diode which together with other required components was mounted inside the ring structure. A tuning bandwidth of ~30% was achieved with forward and reverse biasing of the varactor diode. The measured phase noise of the new oscillator was found to be better than -90 dBc kHz from the carrier Microwave voltage tuned microstrip ring resonator oscillator P Gardner DK Paul KP Tan Electronics Letters, Vol. 30, No. 21. (1994), pp. 1770-1771. 2008-05-09T15:20:58-00:00 1994 Electronics Letters 30 21 1770 1771 microwave oscillator resonator ring http://www.citeulike.org/user/dcastro/article/2768627 <i>Electronics Letters, Vol. 41, No. 14. (2005), pp. 810-811.</i><br /><br />A new topology for the design of microstrip microwave diplexers, based on the use of quasi-lumped resonators, is presented. Specifically, the receiver (Rx) and transmitter (Tx) filters of the diplexer are implemented by etching complementary split ring resonators (CSRRs) in the ground plane as well as series capacitive gaps and shunt inductive strips in the upper metal level. By this means, narrowband microwave diplexers with transmission zeros can be synthesised, which allow for the improvement of Rx/Tx isolation. A prototype device operative in the 2.4-3.0 GHz frequency band is presented. Measured insertion losses are lower than 2 dB while the isolation between Rx/Tx channels is in the vicinity of 40 dB. Diplexer dimensions (29.8/spl times/16.3 mm), which are small on account of the semi-lumped resonators employed, and performance point to the practical application of these structures in communication transceiver front-ends. Complementary split ring resonators for microstrip diplexer design J Bonache I Gil J Garcia-Garcia F Martin doi:10.1049/el:20050895 Electronics Letters, Vol. 41, No. 14. (2005), pp. 810-811. 2008-05-08T06:28:27-00:00 2005 Electronics Letters 41 14 810 811 diplexer microstrip resonator ring http://www.citeulike.org/user/dcastro/article/2774608 <i>Microwaves, Antennas and Propagation, IEE Proceedings -, Vol. 151, No. 5. (2004), pp. 430-434.</i><br /><br />A novel design of a dual-mode resonator with a double-ring structure for band-pass filter applications is presented in this paper. Conventionally, dual-mode ring resonators are used to obtain band-pass filters. Based on voltage/current couplings, a dual-mode double-ring resonator was recently constructed to improve the responses of the conventional dual-mode ring resonator. In order to obtain a low insertion loss, a wide band and higher rejection, three filters using a dual-mode double-ring resonator are designed for 2.4 GHz ISM band applications. Dual-mode double-ring resonators for microstrip band-pass-filter applications JC Liu PC Lu CH Shie CS Cheng L Yao doi:10.1049/ip-map:20040725 Microwaves, Antennas and Propagation, IEE Proceedings -, Vol. 151, No. 5. (2004), pp. 430-434. 2008-05-09T07:26:03-00:00 2004 Microwaves, Antennas and Propagation, IEE Proceedings - 151 5 430 434 bandpass dual filter microstrip mode resonator ring http://www.citeulike.org/user/dcastro/article/2782059 <i>Electronics Letters, Vol. 30, No. 22. (1994), pp. 1861-1862.</i><br /><br />A novel ring resonator topology was developed which exhibits mode suppression characteristics. The resonator achieves the mode suppression by incorporation of a stepped impedance lowpass filter directly into the ring resonator. Experimental results show that complete suppression of a ring resonator's second mode can be achieved with no increase in circuit size. The topology effectively increases the rejection bandwidth of the ring resonator Microstrip mode suppression ring resonator JM Carroll K Chang Electronics Letters, Vol. 30, No. 22. (1994), pp. 1861-1862. 2008-05-10T00:01:38-00:00 1994 Electronics Letters 30 22 1861 1862 microstrip resonator http://www.citeulike.org/user/dcastro/article/2839824 <i>Microwave Symposium, 2007. IEEE/MTT-S International (2007), pp. 1823-1826.</i><br /><br />A new configuration of composite right/left handed (CRLH) metamaterial structure is proposed, which comprises of TE-resonant dielectric resonators and metallic parallel mesh plates. The balanced CRLH transmission lines are designed by adjusting the optimal distance between the mesh plates for a given size of the mesh windows. To confirm the fundamental operation, the transmission and far field radiation characteristics are simulated and measured for the one-dimensional structure. The numerical results show that the increase in the thickness of metallic mesh plates dramatically reduces the radiation efficiency. Nevertheless, the numerical simulation and measurement validate the continuous change in the phase flow along the waveguide from backward to forward directions with the operational frequency. Composite Right/Left Handed Metamaterial Structures Composed of Dielectric Resonators and Parallel Mesh Plates T Ueda N Michishita T Itoh doi:10.1109/MWSYM.2007.380104 Microwave Symposium, 2007. IEEE/MTT-S International (2007), pp. 1823-1826. 2008-05-28T06:41:40-00:00 2007 Microwave Symposium, 2007. IEEE/MTT-S International 1823 1826 crlh metamaterial resonator http://www.citeulike.org/user/dcastro/article/2776110 <i>Microwaves, Antennas and Propagation, IEE Proceedings -, Vol. 143, No. 2. (1996), pp. 184-188.</i><br /><br />Symmetrical transmission line ring resonators are studied using the generalised reflection coefficient concept and the odd- and even-mode analysis method. The mode distributions for closed, tunable and selectively damped rings are derived. A normalised tuning characteristic is generated for a capacitively tunable ring, showing agreement with derivations based on current continuity in the limit of loose coupling. The perturbation of resonant frequencies by nonzero coupling is also calculated. An optimum value for an even-mode damping resistance is derived. A circuit simulator is used to demonstrate that the features derived analytically for lossless lines persist when realistic values of loss and dispersion are introduced Transmission line analysis of symmetrical ring resonators P Gardner DK Paul Microwaves, Antennas and Propagation, IEE Proceedings -, Vol. 143, No. 2. (1996), pp. 184-188. 2008-05-09T15:18:05-00:00 1996 Microwaves, Antennas and Propagation, IEE Proceedings - 143 2 184 188 resonator ring tl http://www.citeulike.org/user/dcastro/article/2839825 <i>Microwave Symposium, 2007. IEEE/MTT-S International (2007), pp. 1623-1626.</i><br /><br />Metamaterial-based composite right/left-handed transmission lines are used in the design of fixed frequency and tunable ring resonators. Under specific design conditions, the first two resonant modes can be narrowly spaced. A simple passive band-pass filter is demonstrated at 2.92 GHz with a bandwidth of about 9% using this concept. This type of design is also used as a tunable resonator and a tuning range of 30% is demonstrated. Fixed Frequency and Tunable Metamaterial-Based Ring Resonators with Narrowly Spaced Resonances CA Allen KMK Leong T Itoh doi:10.1109/MWSYM.2007.379997 Microwave Symposium, 2007. IEEE/MTT-S International (2007), pp. 1623-1626. 2008-05-28T06:41:40-00:00 2007 Microwave Symposium, 2007. IEEE/MTT-S International 1623 1626 metamaterial resonator ring http://www.citeulike.org/user/dcastro/article/1967474 <i>Electronics Letters, Vol. 43, No. 9. (2007), pp. 530-532.</i><br /><br />Microstrip lines periodically loaded with broad-side coupled spiral resonators (BC-SRs) are designed, fabricated and characterised for the first time. These structures inhibit signal propagation in the vicinity of the resonance frequency of the spirals, f_o. This stopband behaviour is due to magnetic coupling between the line and the BC-SRs at resonance. As long as the electrical size of the BC-SRs is small, the structures can also be considered as metamaterial transmission lines with negative effective permeability, mu_eff. This negative value of mu_eff takes place in a narrow band above f_o, as occurs in split ring resonator (SRR) loaded lines, or in transmission lines coupled to spiral resonators etched in a single metal level (edge-coupled spiral resonators (EC-SRs). However, because each loop of the BC-SR is etched in a different metal level (face-to-face loops), the equivalent capacitance of the resonant tank can be substantially enhanced. Thus, by using narrow microwave substrates, the BC-SRs loaded lines can be made much smaller than SRR or EC-SR loaded lines Metamaterial transmission lines based on broad-side coupled spiral resonators F Aznar M Gil J Bonache J Garcia-Garcia F Martin Electronics Letters, Vol. 43, No. 9. (2007), pp. 530-532. 2007-11-23T16:52:14-00:00 2007 Electronics Letters 43 9 530 532 crlh metamaterial resonator tl transmission http://www.citeulike.org/user/dcastro/article/2762264 <i>Electronics Letters, Vol. 26, No. 12. (1990), pp. 774-775.</i><br /><br />A new transmission line based theory is developed to study symmetric/asymmetric microstrip ring resonators. The selective splitting of odd modes in certain asymmetric structures can be used to realise bandpass filters. The theory predicts the characteristics of these resonators quite accurately Bandpass characteristics of split-modes in asymmetric ring resonators GK Gopalakrishnan K Chang Electronics Letters, Vol. 26, No. 12. (1990), pp. 774-775. 2008-05-06T18:38:39-00:00 1990 Electronics Letters 26 12 774 775 bandpass resonator ring http://www.citeulike.org/user/dcastro/article/2822776 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 41, No. 9. (1993), pp. 1648-1650.</i><br /><br />A slotline type of annular ring element has been developed as a new circuit component for resonator, filter, and hybrid coupler applications. Various coupling methods were devised for the use of this slotline ring in many applications. A new type of slotline dual-mode filter has been developed with a bandwidth of 12.3% and a stopband attenuation of more than 30 dB at the center frequency of 3.5 GHz. Another slotline type of cross-over hybrid ring coupler which utilized a slotline T-junction and a resistively-coupled slotline ring has also been developed with a bandwidth of more than 80%, an excellent power dividing balance of ±0.2 dB, and a fairly good isolation of 35 dB. With the ease of adding series and shunt components, the slotline annular ring element should have many applications for MICs and MMICs Slotline annular ring elements and their applications to resonator, filter and coupler design Chien-Hsun Ho Lu Fan Kai Chang doi:10.1109/22.245694 Microwave Theory and Techniques, IEEE Transactions on, Vol. 41, No. 9. (1993), pp. 1648-1650. 2008-05-22T10:40:33-00:00 1993 Microwave Theory and Techniques, IEEE Transactions on 41 9 1648 1650 coupler filter microwave resonator ring http://www.citeulike.org/user/dcastro/article/2774725 <i>Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific, Vol. 3 (1997), pp. 945-948 vol.3.</i><br /><br />An active integrated antenna array consisting of a parallel feedback FET oscillator and a patch antenna is demonstrated. In this paper a two element array was fabricated and examined. The patch antenna was incorporated into oscillator feedback loop to enhance stability of the resonator operation frequency. Two slot apertures were embedded in the ground plane of the patch resonator and electromagnetically coupled with microstrip feed lines which consist of the oscillator feedback loop. An observed spectrum and an antenna pattern were also investigated Quasi-optical patch resonator antenna array H Shiomi K Hayata Y Kido S Kawasaki doi:10.1109/APMC.1997.656356 Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific, Vol. 3 (1997), pp. 945-948 vol.3. 2008-05-09T08:23:53-00:00 1997 Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific 3 945 948 vol.3 active antenna array resonator http://www.citeulike.org/user/dcastro/article/2782036 <i>Electronics Letters, Vol. 30, No. 21. (1994), pp. 1772-1774.</i><br /><br />Unwanted even order modes in tunable microstrip ring resonators can be suppressed by providing a low resistance path to ground at an appropriate point on the ring. This suppression method is simple to implement, and has minimal effect on the Q factor and the resonance frequency of the wanted modes Suppression of even modes in microstrip ring resonators DK Paul P Gardner KP Tan Electronics Letters, Vol. 30, No. 21. (1994), pp. 1772-1774. 2008-05-09T23:51:31-00:00 1994 Electronics Letters 30 21 1772 1774 microstrip resonator http://www.citeulike.org/user/dcastro/article/2782028 <i>Microwave and Wireless Components Letters, IEEE, Vol. 14, No. 3. (2004), pp. 124-126.</i><br /><br />Periodic etched pattern on the ground plane underneath the ring resonator are incorporated to realize a miniaturized ring filter with stronger rejection of higher harmonic passbands. Two square microstrip ring filters, with and without periodic etched pattern on the ground plane, were designed with a bandwidth of 135 MHz centered at 2.4 GHz and 3 GHz respectively. A rejection of at least 25 dB of the second harmonic passband has been achieved for the filter with periodic etched pattern. EBG-based dual mode resonator filter YW Kong ST Chew doi:10.1109/LMWC.2003.822570 Microwave and Wireless Components Letters, IEEE, Vol. 14, No. 3. (2004), pp. 124-126. 2008-05-09T23:50:40-00:00 2004 Microwave and Wireless Components Letters, IEEE 14 3 124 126 dual filter mode resonator http://www.citeulike.org/user/BrendaChng/article/1304976 <i>(21 Mar 2007)</i><br /><br />We investigate theoretically the mechanical effects of light on atoms trapped by an external potential, whose dipole transition couples to the mode of an optical resonator and is driven by a laser. We derive an analytical expression for the quantum center-of-mass dynamics, which is valid in presence of a tight external potential. This equation has broad validity and allows for a transparent interpretation of the individual scattering processes leading to cooling. We show that the dynamics are a competition of the mechanical effects of the cavity and of the laser photons, which may mutually interfere. We focus onto the good-cavity limit and identify novel cooling schemes, which are based on quantum interference effects and lead to efficient ground state cooling in experimentally accessible parameter regimes. Mechanical effects of optical resonators on driven trapped atoms: Ground state cooling in a high finesse cavity Stefano Zippilli Giovanna Morigi (21 Mar 2007) 2007-05-18T08:21:40-00:00 2007 cavity resonator singleatom http://www.citeulike.org/user/awooga/article/1727564 <i>Isr J Med Sci, Vol. 18, No. 1. (January 1982), pp. 83-92.</i><br /><br />A model was constructed of the relations between the incoming excitatory postsynaptic potentials and inhibitory postsynaptic potentials to the intracellular membrane potential fluctuations and to the firing rate of a single neuron. From this model, the strength of synapses was assessed in two ways: 1) the ability of several synchronous presynaptic spikes to initiate a postsynaptic spike, termed the synchronous gain of the synapse; and 2) the ability of several asynchronous presynaptic spikes to add a spike to the output spike train, called the asynchronous gain. It was found that for the conditions prevailing in the brain's cortex, the synchronous gain is almost always higher. It appears that the cortical neurons act as coincidence detectors, and that the appropriate code for the higher cortical functions is coincidence and not firing rate. Role of the cortical neuron: integrator or coincidence detector? M Abeles Isr J Med Sci, Vol. 18, No. 1. (January 1982), pp. 83-92. 2007-10-04T14:27:23-00:00 1982 Isr J Med Sci 0021-2180 18 1 83 92 cortex dynamics integrator neuron resonator