Title :
Reduction of feed blockage in reflectarray by orthogonally polarized transformation
Author :
Wu, Zhi-Hang ; Zhang, Wen-Xun ; Liu, Zhen-Guo ; Shen, Wei
Author_Institution :
State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China
Abstract :
A microstrip reflectarray is usually composed of a feed and an array of printed metal patch elements that are slightly different from each other to reflect the incident field into a phase-coherent beam in a prescribed direction. The feed placed in front of the reflectarray causes blockage to the reflected wave. A reflectarray with orthogonally polarized transformation is proposed in an innovative concept developed for blockage reduction. The reflectarray is simulated with valuable data, designed on high performances, and fabricated. About 4 dB gain drop due to feed-blockage may be avoided by this technology, and about a 10 % frequency band may be covered.
Keywords :
antenna radiation patterns; electromagnetic wave polarisation; microstrip antenna arrays; reflector antenna feeds; 9.5 to 10.2 GHz; feed blockage reduction; gain drop; microstrip reflectarray; orthogonally polarized transformation; radiation pattern; Absorption; Bandwidth; Dynamic range; Feeds; Frequency; Log periodic antennas; Optimized production technology; Phased arrays; Polarization; Reflector antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552655
