Sat, 26 Jul 2008 06:11:41 BST CiteULike: dcastro's lh http://www.citeulike.org/user/dcastro/tag/lh CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/3015428 <i>Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on (2007), pp. 1-6.</i><br /><br />A GaAs MMIC technology of the novel compact left-handed bandpass filter consisting of one left-handed (LH) transmission line (TL) and one dual composite right/lefthanded (D-CRLH) TL is presented. The D-CRLH is the dual of the conventional CRLH in the sense that it consists of a LC parallel-tank impedance and of a LC series-tank admittance. In contrast to the conventional CRLH TL which has LH operation at low-frequency and RH one at high-frequency, the D-LH TL exhibits its LH band at high frequencies and its RH band at low frequencies. Thus, utilizing the high pass property of LH and low pass property of D-CRLH, a bandpass filter can be constructed. In this paper, this novel idea is realized by MMIC technology. The proposed filter exhibits a broad passband from 6.2 GHz to 20.8 GHz with a size of 1.43 mm². Compact Fully Integrated GaAs Left-Handed Bandpass Filter for Ultrawide Band Wireless Applications W Tong H Yang Z Hu H Zhang Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on (2007), pp. 1-6. 2008-07-17T19:56:34-00:00 2007 Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on 1 6 crlh filter lh metamaterial uwb wireless http://www.citeulike.org/user/dcastro/article/2941960 <i>Comptes Rendus Physique, Vol. 6, No. 6. ( 2005), pp. 683-692.</i><br /><br />We review the electromagnetic properties of artificial structures such as photonic band gap materials (Electromagnetic Band Gap at microwaves) and metamaterials with main emphasis on backward (left-handed) propagation media. We consider free space and guiding structures by showing how the interaction of the electromagnetic wave with periodic dielectric (PBGs) and double negative metallic structures (DNGs) yields a negative refractive index. Some of the potential applications in connection with negative index media are briefly discussed such as focusing for a flat lens and phase advance for a left handed transmission line. To cite this article: T. Decoopman et al., C. R. Physique 6 (2005). Left-handed propagation media via photonic crystal and metamaterials Thibaut Decoopman Thomas Crepin Mathias Perrin Sophie Fasquel Aurélien Marteau Xavier Mélique Eric Lheurette Olivier Vanbésien Didier Lippens doi:10.1016/j.crhy.2005.06.007 Comptes Rendus Physique, Vol. 6, No. 6. ( 2005), pp. 683-692. 2008-06-29T18:30:15-00:00 2005 Comptes Rendus Physique 6 6 683 692 crlh lh metamaterial pbg http://www.citeulike.org/user/dcastro/article/2941928 <i>Journal of Applied Physics, Vol. 90, No. 11. (2001), pp. 5483-5486.</i><br /><br />View This Record in Scopus Full-wave verification of the fundamental properties of left-handed materials in waveguide configurations C Caloz CC Chang T Itoh Journal of Applied Physics, Vol. 90, No. 11. (2001), pp. 5483-5486. 2008-06-29T18:02:13-00:00 2001 Journal of Applied Physics 90 11 5483 5486 AIP crlh lh metamaterial http://www.citeulike.org/user/dcastro/article/2941927 <i>AEU - International Journal of Electronics and Communications, Vol. 56, No. 6. (2002), pp. 407-410.</i><br /><br />Summary This brief overview covers a rapidly occurring development in the area of microwave composite materials: isotropic dielectric-magnetic mediums wherein the phase velocity vector and the time-averaged Poynting vector are oppositely directed. Such materials have also been inappropriately designated as left-handed materials. Ramifications for aberration-free lenses, homogenization approaches, and complex mediums are also presented. Brief Overview of Recent Developments on Negative Phase-Velocity Mediums (alias Left-Handed Materials) Akhlesh Lakhtakia Martin Mccall Werner Weiglhofer doi:10.1078/1434-8411-54100129 AEU - International Journal of Electronics and Communications, Vol. 56, No. 6. (2002), pp. 407-410. 2008-06-29T18:01:26-00:00 2002 AEU - International Journal of Electronics and Communications 56 6 407 410 lh metamaterial http://www.citeulike.org/user/dcastro/article/2941923 <i>Physical Review Letters, Vol. 85, No. 14. (2 October 2000), 2933.</i> Negative Refractive Index in Left-Handed Materials David Smith Norman Kroll doi:10.1103/PhysRevLett.85.2933 Physical Review Letters, Vol. 85, No. 14. (2 October 2000), 2933. 2008-06-29T17:59:24-00:00 2000 Physical Review Letters 85 14 2933 American Physical Society lh metamaterial http://www.citeulike.org/user/dcastro/article/2941921 <i>Physical Review Letters, Vol. 91, No. 3. (18 July 2003), 037401.</i> Nonlinear Properties of Left-Handed Metamaterials Alexander Zharov Ilya Shadrivov Yuri Kivshar doi:10.1103/PhysRevLett.91.037401 Physical Review Letters, Vol. 91, No. 3. (18 July 2003), 037401. 2008-06-29T17:58:14-00:00 2003 Physical Review Letters 91 3 037401 American Physical Society lh metamaterial nonlinear http://www.citeulike.org/user/dcastro/article/2809085 <i>Microwave Conference, 2006. 36th European (2006), pp. 1048-1051.</i><br /><br />A meandered dipole with polarisation orthogonal to its length is presented. The dipole is made by loading a folded dipole in a way similar to a left handed transmission line. A prototype has been designed and constructed. Results confirm that good input matching and radiation pattern are achieved, although gain is low due to losses in the loading structure Orthogonally Polarised Dipole Antenna using Left Handed Transmission Lines H Iizuka PS Hall doi:10.1109/EUMC.2006.281113 Microwave Conference, 2006. 36th European (2006), pp. 1048-1051. 2008-05-18T14:13:31-00:00 2006 Microwave Conference, 2006. 36th European 1048 1051 antenna crlh dipole lh metamaterial tl http://www.citeulike.org/user/dcastro/article/2809071 <i>Antennas and Propagation Society International Symposium 2006, IEEE (2006), pp. 394-397.</i><br /><br />Application of left-handed (LH) metamaterials in the field of microwave engineering has grown rapidly following their experimental verification. In particular, the LH transmission line (TL) has been used to realize various microwave devices not possible with conventional TLs alone. The purpose of this paper is to summarize some of the recent advances in microwave devices based on LH TLs. In particular, devices based on the unique characteristics of the composite right/left-handed (CRLH) TL, which is the general model of a practical LH TL, are presented. Microwave devices based on left-handed transmission lines A Lai KMKH Leong T Itoh doi:10.1109/APS.2006.1710541 Antennas and Propagation Society International Symposium 2006, IEEE (2006), pp. 394-397. 2008-05-18T14:06:55-00:00 2006 Antennas and Propagation Society International Symposium 2006, IEEE 394 397 crlh lh metamaterial microwave tl http://www.citeulike.org/user/dcastro/article/2805159 <i>Microwave Conference, 2005 European, Vol. 1 (2005), 4 pp..</i><br /><br />This paper reports on the design of a novel LC balun based on a replacement circuit of right-handed (RH) and left-handed transmission lines in combination. This approach gives a very simple balun structure with excellent broadband performance. The balun is designed for WLAN applications in the 5 GHz ISM band. Concept of the balun, simulation, realisation and measurement results are presented. A simple LTCC balun for WLAN applications using left-handed (LH) transmission lines (TL) K Markov S Royak G Sevskiy P Heide doi:10.1109/EUMC.2005.1608813 Microwave Conference, 2005 European, Vol. 1 (2005), 4 pp.. 2008-05-16T12:02:17-00:00 2005 Microwave Conference, 2005 European 1 4 pp. balun crlh lh metamaterial tl wlan http://www.citeulike.org/user/dcastro/article/2782047 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 53, No. 4. (2005), pp. 1515-1521.</i><br /><br />The novel one-dimensional left-handed microstrip lines (LHMLs) consisting of the arrays of thin wires and two-layer split-ring resonators are investigated theoretically and experimentally in this paper. Unlike the conventional left-handed metamaterials for waveguides or microstrip lines, which are bulky three-dimensional constructions or require the lumped elements for high-pass configuration, this distributed structure can be directly implemented on a substrate by photolithographic techniques without soldering any chip inductors or capacitors. Moreover, it can also be easily realized at a higher frequency region by scaling the dimensions of the structure, making it highly efficient and flexible in millimeter-wave applications. To characterize the inhomogeneous LHML, the effective medium description is developed for extracting the effective electromagnetic parameters, i.e., the complex effective permittivity and permeability, as well as the refractive index. Results show that not only the simultaneously negative real permittivity and permeability, but also the antiparallel phase and group velocities may be achieved in the design passband region. In contrast to the antenna array using the conventional microstrip delay line, the LHML is incorporated in the series-fed microstrip combline array to exhibit the leading phase between the successive elements. Effective electromagnetic parameters of novel distributed left-handed microstrip lines Shau-Gang Mao Shiou-Li Chen Chen-Wei Huang doi:10.1109/TMTT.2005.845192 Microwave Theory and Techniques, IEEE Transactions on, Vol. 53, No. 4. (2005), pp. 1515-1521. 2008-05-09T23:56:00-00:00 2005 Microwave Theory and Techniques, IEEE Transactions on 53 4 1515 1521 lh line microstrip http://www.citeulike.org/user/dcastro/article/2674803 <i>Antennas and Propagation, IEEE Transactions on, Vol. 55, No. 5. (2007), pp. 1246-1253.</i><br /><br />A new type of dipole antenna using a left-handed transmission line is proposed. The antenna is composed of a transmission line loaded periodically with shunt inductors and series capacitors. The placement of capacitors into one side only of the line leads to currents of different amplitude on the two sides. Because out-of-phase currents have different amplitudes, they do not completely cancel in the far field, and as a result radiate. Numerical investigation of a wire model shows a unique feature of left-handed transmission lines, which is a reduced wavelength with decreasing frequency. Measured results of two antennas are presented. One is a short dipole antenna working at n=-1, based on conventional resonance numbering. The antenna of 0.18 wavelengths in free space has a gain of -3.9 dBi and bandwidth of 1.7% for |S₁₁|<-10 dB. The other is a meandered dipole antenna working at n=-9. Polarization orthogonal to a right-handed one is achieved by the induced current of |-9| half wavelengths on the meander having 0.77 wavelengths in free space Left-Handed Dipole Antennas and Their Implementations H Iizuka PS Hall doi:10.1109/TAP.2007.895568 Antennas and Propagation, IEEE Transactions on, Vol. 55, No. 5. (2007), pp. 1246-1253. 2008-04-15T18:19:02-00:00 2007 Antennas and Propagation, IEEE Transactions on 55 5 1246 1253 antenna dipole lh metamaterial http://www.citeulike.org/user/dcastro/article/2648172 <i>Microwave and Wireless Components Letters, IEEE, Vol. 14, No. 1. (2004), pp. 10-12.</i><br /><br />A new type of compact band pass filters based on planar structures with three metal levels is proposed. The central layer consists on a coplanar waveguide (CPW) with periodic wire connections between the central strip and ground planes. In the upper and lower metal levels, split ring resonators (SRRs) are etched and aligned with the slots. The wires make the structure to behave as a microwave plasma, with a negative effective permittivity covering a wide frequency range. SRRs, which are magnetically coupled to the CPW, provide a negative magnetic permeability in a narrow frequency range above their resonant frequency. The result is a band pass structure which supports wave propagation in a frequency interval where negative permittivity and permeability coexist. The bandwidth of the structure can be controlled by tuning the resonant frequency of the upper and lower SRRs and the distance between SRRs. Fabricated prototype devices exhibit very low insertion losses in the pass band (<1.5 dB) and high frequency selectivity. Left handed coplanar waveguide band pass filters based on bi-layer split ring resonators F Falcone F Martin J Bonache R Marques T Lopetegi M Sorolla doi:10.1109/LMWC.2003.821512 Microwave and Wireless Components Letters, IEEE, Vol. 14, No. 1. (2004), pp. 10-12. 2008-04-10T06:51:14-00:00 2004 Microwave and Wireless Components Letters, IEEE 14 1 10 12 coplanar filter lh metamaterial http://www.citeulike.org/user/dcastro/article/2648146 <i>Solid-State and Integrated Circuit Technology, 2006. ICSICT '06. 8th International Conference on (2006), pp. 1565-1567.</i><br /><br />A GaAs solid state passive coplanar waveguide (CPW) left-handed metamaterial medium is proposed and validated by measured results. The unit cell of the fabricated structures has a size of 0.09 mm². The left handedness range of the solid state left-handed structure extends from 2.3 GHz to 17.5 GHz. The compactness and broad left-handed operating bandwidth make the presented left-handed metamaterial be well incorporated with RF/MMIC applications Compact and Broadband Coplanar Waveguide Left-Handed Metamaterial Transmission Line for RF/ MICC Application Wei Tong ZR Hu P Curtis M Missous doi:10.1109/ICSICT.2006.306290 Solid-State and Integrated Circuit Technology, 2006. ICSICT '06. 8th International Conference on (2006), pp. 1565-1567. 2008-04-10T06:42:12-00:00 2006 Solid-State and Integrated Circuit Technology, 2006. ICSICT '06. 8th International Conference on 1565 1567 broadband compact coplanar lh metamaterial tl http://www.citeulike.org/user/dcastro/article/2067715 <i>Antennas and Propagation Society International Symposium, 2005 IEEE, Vol. 1A (2005), pp. 656-659 Vol. 1A.</i><br /><br />A super compact multilayer broadband left-handed metamaterial medium for RF/MMIC applications is proposed and demonstrated by the full wave simulation and equivalent circuit analysis. Here we propose to employ multilayer technology to realize left-handedness. The unit cell of the multilayer structure is a thousand times smaller than that of the microstrip structure to achieve the same series capacitance. The left handedness of the novel structure extends from 2.1GHz to 28.2GHz. performing in much wider bandwidth than those reported so far. The compactness and broad left-handed operating bandwidth make the proposed left-handed metamaterial be well incorporated with RF/MMIC applications. A super compact multilayer broadband left-handed metamaterials for RF/MMIC applications Wei Tong ZR Hu Antennas and Propagation Society International Symposium, 2005 IEEE, Vol. 1A (2005), pp. 656-659 Vol. 1A. 2007-12-06T17:01:28-00:00 2005 Antennas and Propagation Society International Symposium, 2005 IEEE 1A 656 659 Vol. 1A broadband compact lh metamaterial rf http://www.citeulike.org/user/dcastro/article/1992104 <i>Antenna Technology: Small Antennas and Novel Metamaterials, 2005. IWAT 2005. IEEE International Workshop on (2005), pp. 183-186.</i><br /><br />In this paper, we have designed microstrip left-handed leaky wave antennas (LH LWAs) working from 75 to 82 GHz, and we have conformed beam scanning by MoM simulation. A conventional LH LWA for microwave applications consists of series interdigital capacitors and shunt stubs connected with vias to the ground. Manufacturing the interdigital capacitor and meander-line inductor working at mm-wave frequencies is very hard because of the etching tolerance. In the case of the mm-wave antenna, the value of capacitance, and inductance becomes smaller than that of the microwave antenna, so the interdigital capacitor and shunt meander-line inductor can be replaced with a simple gap capacitor and line inductor. In this paper, we have designed a planar mm-wave frequency LH LWA. In order to maximize the fabrication tolerance, we have chosen a via-free LH structure with a simple series gap and a straight shunt inductor connected with a virtual ground patch in the unit cell, which will contribute to reducing conductor losses as well. Left-handed leaky wave antenna for millimeter-wave applications S Matsuzawa K Sato A Sanada H Kubo S Aso Antenna Technology: Small Antennas and Novel Metamaterials, 2005. IWAT 2005. IEEE International Workshop on (2005), pp. 183-186. 2007-11-27T10:23:40-00:00 2005 Antenna Technology: Small Antennas and Novel Metamaterials, 2005. IWAT 2005. IEEE International Workshop on 183 186 antenna leaky lh metamaterial http://www.citeulike.org/user/dcastro/article/1992073 <i>Microwave Symposium Digest, 2004 IEEE MTT-S International, Vol. 1 (2004), pp. 301-304 Vol.1.</i><br /><br />A via-free microstrip left-handed (LH) transmission line (TL) is proposed, which enables easy and low-cost fabrication of backward wave TLs. Based on the equivalent circuit, dispersion characteristics of the TL are theoretically obtained and the effect of the virtual short capacitance on the LH bandwidth is shown. The balanced/unbalanced CRLH criterion for seamless transition from the backward and forward wave propagation is also derived. The microstrip LH TL is implemented and the backward wave support is confirmed both by full-wave FEM simulations and experiments. A 38-cell TL exhibits a backward to forward scanning leaky-wave antenna capability. A via-free microstrip left-handed transmission line A Sanada K Murakami S Aso H Kubo I Awai Microwave Symposium Digest, 2004 IEEE MTT-S International, Vol. 1 (2004), pp. 301-304 Vol.1. 2007-11-27T10:18:44-00:00 2004 Microwave Symposium Digest, 2004 IEEE MTT-S International 1 301 304 Vol.1 crlh lh microstrip tl http://www.citeulike.org/user/dcastro/article/1992063 <i>Antennas and Propagation, IEEE Transactions on, Vol. 52, No. 5. (2004), pp. 1159-1166.</i><br /><br />A transmission line (TL) approach of left-handed (LH) materials is proposed. The transmission characteristics of an ideal LH-TL are presented, the constitutive parameters of an equivalent LH material are derived and shown to be negative, and some LH-transmission paradoxes are explained. Next, a method to design an artificial LH-TL in the form of an ideal lumped-elements ladder network is described and illustrated with simulation results. It is shown that, in this line, left-handedness can be achieved without losses over an unlimited bandwidth, from the cutoff of the resulting high-pass filter to infinity, with excellent agreement with theory. Finally, a microstrip implementation of the LH line for microwaves, using interdigital capacitors and stub inductors, is demonstrated, with moderate insertion loss and a broad bandwidth of the order of 100%. Transmission line approach of left-handed (LH) materials and microstrip implementation of an artificial LH transmission line C Caloz T Itoh Antennas and Propagation, IEEE Transactions on, Vol. 52, No. 5. (2004), pp. 1159-1166. 2007-11-27T10:16:41-00:00 2004 Antennas and Propagation, IEEE Transactions on 52 5 1159 1166 crlh lh metamaterial microstrip tl http://www.citeulike.org/user/dcastro/article/1988310 <i>Applied Superconductivity, IEEE Transactions on, Vol. 15, No. 2. (2005), pp. 996-999.</i><br /><br />In this paper, for the first time, we study the properties of a superconductive-based left-handed transmission line (SLHTL). The effect of the kinetic inductance on the propagation constant of the left-handed transmission line is analyzed. It is shown that increasing the kinetic inductance decreases both the bragg frequency and the negative index frequency band of a distributed LHTL. A Coplanar waveguide structure is proposed to realize the LHTL. It is shown that the CPW structure has the capability of increasing the kinetic inductance of the TL by narrowing the spacing between the line and the ground plane because they are deposited on the same side of the substrate. This was not possible in a microstrip line as the spacing between the line and the ground is equal to the substrate thickness and is usually fixed. Furthermore, the dependency of the kinetic inductance to the bias current has been employed to design a tunable SLHTL. Possible applications of the tunable SLHTL in the design of miniaturized tunable resonators and filters are discussed. Analysis and design of Superconducting left-handed transmission lines H Salehi AH Majedi RR Mansour Applied Superconductivity, IEEE Transactions on, Vol. 15, No. 2. (2005), pp. 996-999. 2007-11-26T20:30:26-00:00 2005 Applied Superconductivity, IEEE Transactions on 15 2 996 999 crlh lh tl http://www.citeulike.org/user/dcastro/article/1988297 <i>Microwave Symposium Digest, 2003 IEEE MTT-S International, Vol. 1 (2003), pp. 317-320 vol.1.</i><br /><br />A novel broadband left-handed (LH) coupled-line backward coupler with arbitrary coupling level is presented. This coupler is composed of two LH transmission lines (TL) constituted of series interdigital capacitors and shunt shorted-stub inductors. A quasi-0dB implementation of the coupler is demonstrated by simulation and measurement results, and shown to exhibit a bandwidth of 35% despite the relatively wide lines-gap of 0.3mm. An even/odd modes analysis is presented to explain the working principle of the component. A 3dB-quadrature implementation, with 37% bandwidth, is also demonstrated. Finally, parametric results illustrate the versatility of the LH coupler and its strongly enhanced backward coupling compared with the conventional coupled-line coupler. A broadband left-handed (LH) coupled-line backward coupler with arbitrary coupling level C Caloz A Sanada L Liu T Itoh Microwave Symposium Digest, 2003 IEEE MTT-S International, Vol. 1 (2003), pp. 317-320 vol.1. 2007-11-26T20:28:44-00:00 2003 Microwave Symposium Digest, 2003 IEEE MTT-S International 1 317 320 vol.1 broadband coupler crlh lh metamaterial