Title :
Electronically scanned composite right/left handed microstrip leaky-wave antenna
Author :
Lim, Sungjoon ; Caloz, Christophe ; Itoh, Tatsuo
Author_Institution :
Electr. Eng. Dept., Univ. of California, Los Angeles, CA, USA
fDate :
6/1/2004 12:00:00 AM
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° at 35 V to +7.5° at 0 V, and broadside occurs at 9 V, at the fixed frequency of 3.23 GHz.
Keywords :
composite materials; leaky wave antennas; microstrip antennas; scanning antennas; 3.23 GHz; 35 V; 9 V; CRLH metamaterials; capacitive loading; circuit model; composite right-left handed microstrip leaky-wave antenna; continuous scanning; dominant mode; electronically scanned microstrip leaky-wave antenna; propagation constant; radiated beam; unit cell; varactors; voltage scanning; Antennas and propagation; Circuits; Leaky wave antennas; Loaded antennas; Metamaterials; Microstrip antennas; Optical modulation; Propagation constant; Varactors; Voltage; CRLH; Composite right/left handed; LW; antenna; electronical scanning; leaky-wave; metamaterials; structure;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.828008
