Title :
Circularly Polarized Beam-Steering Antenna Array With Butler Matrix Network
Author :
Liu, Changrong ; Xiao, Shaoqiu ; Guo, Yong-Xin ; Tang, Ming-Chun ; Bai, Yan-Ying ; Wang, Bing-Zhong
Author_Institution :
Instn. of Appl. Phys., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
fDate :
7/3/1905 12:00:00 AM
Abstract :
A circularly polarized switched-beam patch antenna array with butler matrix is designed and experimentally demonstrated in this letter. With suitable rotation technique, circular polarized radiation can be improved for beam steering. Also, this technique enhances the axial-ratio (AR) bandwidth within its scanning angle. Measured results showed this array has an impedance and AR bandwidth over a frequency range of 5.75-6.2 GHz when the main beam of array is scanned to different directions. Good agreement is observed between simulation and measurement.
Keywords :
antenna arrays; antenna radiation patterns; beam steering; microstrip antenna arrays; polarisation; axial-ratio bandwidth; beam steering; butler matrix network; circular polarized radiation; circularly polarized beam-steering antenna array; circularly polarized switched-beam patch antenna array; frequency 5.75 GHz to 6.2 GHz; rotation technique; Antenna measurements; Arrays; Bandwidth; Butler matrix; Frequency measurement; Antenna array; beam steering; butler matrix; circular polarization; rotation technique;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2176903
