Title :
Circularly polarized composite right/left-handed leaky-wave antenna
Author :
Hashemi, Mohammed Reza M ; Itoh, Tatsuo
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA
fDate :
Aug. 28 2010-Sept. 3 2010
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).
Keywords :
antenna radiation patterns; leaky wave antennas; polarisation; axial ratio; broadside radiation; circularly polarized composite right/left-handed leaky-wave antenna; frequency 3.4 GHz; frequency 3.7 GHz; frequency 4.3 GHz; frequency beam scanning; quadrature hybrid coupler; radiation patterns; Antenna radiation patterns; Couplers; Dispersion; Leaky wave antennas; Microwave antennas; Microwave theory and techniques;
Conference_Titel :
Wireless Information Technology and Systems (ICWITS), 2010 IEEE International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-7091-4
DOI :
10.1109/ICWITS.2010.5612258
