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In this paper, the evolution of the composite right/left-handed (CRLH) leaky-wave antennas (LWAs) yielding several novel CRLH LWA is reviewed. Starting with the concept of CRLH LWAs, the concave and convex passive CRLH LWAs are discussed along with the conformation effects in each case and a dispersion engineering method is introduced to compensate for the conformation effect to refocus the main radiation...
In this paper a circular polarized (CP) composite right/left-handed (CRLH) leaky-wave antenna (LWA) is presented. This CP CRLH LWA consists of two 25-cell conventional CRLH LWAs oriented orthogonal to each other which are connected to a quadrature hybrid coupler for 90° phase difference feeding purpose. This antenna maintains its CP characteristic while performing continuous frequency beam scanning...
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