Abstract
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 from backward direction to forward direction including broadside radiation. To illustrate the scanning CP characteristics of this CRLH LWA, axial ratio and radiation patterns are obtained and shown for three frequencies of 3.4GHz (backward), 3.7GHz (broadside) and 4.3GHz (forward).
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