Sun, 27 Jul 2008 07:49:06 BST CiteULike: dcastro's resonator http://www.citeulike.org/user/dcastro/tag/resonator CiteULike.org en-gb Copyright © 2004-2008 citeulike.org 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/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/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/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/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/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/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/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/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/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/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/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/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/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/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/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/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/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/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/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/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