Title :
Broadband circularly polarized patch antenna for small satellites applications
Author :
Zhang, Yuhui ; Li, Jianzhou ; Gao, Steven ; Wei, Gao ; Xu, Jiadong
Author_Institution :
Sch. of Electron. & Inf., Northwestern Polytech. Univ., Xi´´an, China
Abstract :
A novel broadband circularly polarized annular patch antenna is presented in this paper. The antenna consists of two annular ring patches which serve as an excitation patch and a parasitic patch, respectively. To produce circular polarization, small perturbations in the shape of triangles are loaded on the patches. To validate the concept, a prototype antenna at S band is designed and fabricated. The measured results confirm the antenna is able to achieve good impedance match and low axial ratio values over a wide range of frequencies. The simulated results agree well with measured results, which show an impedance bandwidth (S11<;-10dB) of 19.5%, and an axial ratio bandwidth (AR<;3dB) of 10.9%. The antenna has a compact size and low cost, thus useful for small satellite data downlink and Telemetry Tracking and Command (TTC) applications.
Keywords :
UHF antennas; microstrip antennas; microwave antennas; satellite antennas; S band antenna; annular ring patch; broadband circularly polarized patch antenna; circular polarization; excitation patch; impedance matching; parasitic patch; small satellite application; Antenna measurements; Bandwidth; Patch antennas; Permittivity; Satellite antennas; Satellites;
Conference_Titel :
Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2012 8th International Symposium on
Conference_Location :
Poznan
Print_ISBN :
978-1-4577-1472-6
DOI :
10.1109/CSNDSP.2012.6292641