標題: Design of Antenna Feed for Mono-pulse Auto-Tracking Ground Station
作者: Lee, Yun-Jui
Chen, Wei-Lin
Yaung, Shan-Kuo
Yang, Ru-Muh
Chen, Ming-Hui
Chu, Chin-Yi
Chung, Shyh-Jong
傳播研究所
Institute of Communication Studies
關鍵字: Mono-pulse antenna feed;septum polarizer;taper;TE21 tracking coupler
公開日期: 2014
摘要: An S-band auto-tracking antenna feed for mono-pulse ground station is presented. The uplink band is from 2.025 to 2.12 GHz and the downlink band is from 2.2 to 2.3 GHz. The feed is utilized to modify the orientation angle of the antenna to align antenna boresight with a satellite. According to the mono-pulse radar theory, the system structure can be divided into two parts, sum and difference channels. Sum channel is used for data transmission and the key component is a septum polarizer which generates circularly polarized electric fields. Difference channel is used to modify the antenna angle and the key component is a TE21 tracking coupler with signal combining circuits. The results show that the polarization isolation is larger than 40 dB, and the axial ratio is smaller than 1.4 dB.
URI: http://hdl.handle.net/11536/136123
ISBN: 978-4-9023-3931-4
期刊: 2014 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)
起始頁: 301
結束頁: 303
顯示於類別:會議論文