Affiliation:
1. The School of Physics and Electronic Information , Anhui Normal University , Wuhu 241002 , China
2. The State Key Laboratory of Complex Electromagnetic Environment Effects on Electronic and Information System , Luoyang 471004 , Henan , China
Abstract
Abstract
A dual-band circular polarized antenna with broad bandwidth is proposed. Two circular grooves with different radii are carved on the ground to generate two frequency bands. Two rectangular slots are engraved on the outside of the circular groove. By adjusting the length of the two slots, this antenna can radiate right-handed circularly polarized (RHCP) waves at two frequency bands, which can cover GPS L5 (1.176 GHz), L2 (1.227 GHz), L1 (1.575 GHz), BDS, GALILEO, and GLONASS bands. The measured −10 dB bandwidth is 46.3 % (1.13–1.81 GHz) and 3 dB axial ratio bandwidths are 15.6 % (1.11–1.30 GHz) and 17.8 % (1.38–1.65 GHz). The measured gains are 2.51 dBi and 2.67 dBi at 1.2 GHz and 1.56 GHz, respectively.
Funder
the open project of the state key laboratory of complex electromagnetic environment effects on electronics and information system
Natural Science Research Project for Universities in Anhui Province
University Synergy Innovation Program of Anhui Province
National Natural Science Foundation of China
Natural Science Foundation of Anhui Province