Journal ArticleDOI
Electronically scanned composite right/left handed microstrip leaky-wave antenna
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TLDR
In this paper, a periodic microstrip leaky-wave antenna based on composite right/left-handed (CRLH) metamaterials is presented, which includes varactors modulating the capacitive loading of the unit cell and therefore the propagation constant of the structure, resulting in voltage scanning of the radiated beam.Abstract:
A novel electronically scanned periodic microstrip leaky-wave (LW) antenna based on the concept of composite right/left-handed (CRLH) metamaterials is presented. This antenna includes varactors modulating the capacitive loading of the unit cell and therefore the propagation constant of the structure, which results in voltage scanning of the radiated beam. An accurate circuit model is proposed. The antenna is demonstrated experimentally to exhibit continuous scanning in the dominant mode from backward to forward angles. The scanning range is from -10/spl deg/ at 35 V to +7.5/spl deg/ at 0 V, and broadside occurs at 9 V, at the fixed frequency of 3.23 GHz.read more
Citations
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Journal ArticleDOI
Reconfigurable scan-beam single-arm spiral antenna integrated with RF-MEMS switches
TL;DR: In this paper, a reconfigurable rectangular spiral antenna with a set of micro electro mechanical system (MEMS) switches, which are monolithically integrated and packaged onto the same substrate, is presented.
PatentDOI
Electronically steerable, artificial impedance, surface antenna
TL;DR: In this paper, a steerable artificial impedance surface antenna steerable in phi and theta angles was proposed, where the dielectric substrate is substantially in an X-Y plane defined by an X axis and a Y axis.
Journal ArticleDOI
Electronically Steerable 1-D Fabry-Perot Leaky-Wave Antenna Employing a Tunable High Impedance Surface
TL;DR: In this article, a fixed-frequency electronically-steerable one-dimensional (1-D) leaky-wave antenna is presented, which is based on a parallel-plate waveguide loaded with a planar partially reflective surface and a tunable high impedance surface.
Journal ArticleDOI
High-gain active composite right/left-handed leaky-wave antenna
TL;DR: In this paper, a novel high-gain active composite right/left-handed (CRLH) metamaterial leaky-wave antenna (LWA) is presented, which is designed to operate at broadside.
Journal ArticleDOI
Compact Quarter-Wave Resonator and Its Applications to Miniaturized Diplexer and Triplexer
TL;DR: In this paper, a novel and compact composite right/left-handed (CRLH) quarter-wave type resonators are proposed, which can resonate at the frequency where the electrical length is phase-leading or negative, which results in a smaller size as compared to the conventional phase-delayed microstrip-line resonator.
References
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Journal ArticleDOI
Transmission line approach of left-handed (LH) materials and microstrip implementation of an artificial LH transmission line
Christophe Caloz,Tatsuo Itoh +1 more
TL;DR: 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.
Journal ArticleDOI
Dominant mode leaky-wave antenna with backfire-to-endfire scanning capability
TL;DR: In this article, a dominant mode leaky-wave antenna is proposed, which is a transmission line structure with radiating wavenumber increasing from negative to positive values, providing backward to forward scanning capability as the frequency is increased.
Journal ArticleDOI
A novel composite right-/left-handed coupled-line directional coupler with arbitrary coupling level and broad bandwidth
TL;DR: In this paper, a novel composite right/left-handed (CRLH) backward-wave coupled-line directional coupler with arbitrary coupling level and broad bandwidth is presented, explained by even/odd-mode analysis, validated by full-wave simulations, and demonstrated by experiments.
Proceedings ArticleDOI
Application of the transmission line theory of left-handed (LH) materials to the realization of a microstrip "LH line"
Christophe Caloz,Tatsuo Itoh +1 more
TL;DR: In this article, Caloz et al. proposed a transmission line (TL) approach of left-handed metamaterials for microwave applications, using an artificial lumped-element LH-TL and proposed a microstrip implementation of this line.
Proceedings ArticleDOI
Novel microwave devices and structures based on the transmission line approach of meta-materials
Christophe Caloz,Tatsuo Itoh +1 more
TL;DR: In this article, a microstrip implementation of a composite right/left handed (CRLH) ideal transmission line (TL) meta-materials with their physical characteristics and the synthesis of practical artificial TL-MMs with their circuital characteristics are presented.