Title :
Stacked CP patch antenna with broad impedance and AR bandwidth
Author :
Bai, Jin ; Chen, Wenhua ; Chen, Yaqin ; Feng, Zhenghe
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A novel stacked CP patch antenna with broadband performance is developed and discussed in this paper. We increased the air substrate and used two long coaxial probes to feed the antenna in order to gain broadband CP performance. A hybrid coupler was welded on the feeding circuit to generate two orthogonal modes with 90° phase difference. The measured results show that the antenna have an impedance bandwidth of 28% (VSWR≤2) from 2.18 Ghz to 2.89 Ghz. The antenna shows stable CP characteristics in its impedance band with the axial ratio of no more than 2.
Keywords :
UHF antennas; UHF couplers; antenna feeds; broadband antennas; microstrip antennas; AR bandwidth; antenna feed; broadband antenna; circularly polarized patch antennas; coaxial probes; feeding circuit; frequency 2.18 GHz to 2.89 GHz; hybrid coupler; impedance bandwidth; orthogonal modes; stacked CP patch antenna; Antenna measurements; Bandwidth; Broadband antennas; Broadband communication; Impedance; Microstrip antennas; Probes; axial ratio; broadband; hybrid coupler; impedance bandwidth; stacked CP antenna;
Conference_Titel :
Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on
Conference_Location :
Spokane, WA
Print_ISBN :
978-1-4244-9562-7
DOI :
10.1109/APS.2011.5996392
