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

fYear

2011

fDate

3-8 July 2011

Firstpage

793

Lastpage

795

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on

Conference_Location

Spokane, WA

ISSN

1522-3965

Print_ISBN

978-1-4244-9562-7

Type

conf

DOI

10.1109/APS.2011.5996392

Filename

5996392