A WIDEBAND CIRCULARLY POLARIZED METALLIC CAVITY ANTENNA FED WITH AN L-SHAPED PROBE

作者：Liu, Longsheng; Zhao, Yang; Li, Yue; Zhang, Zhijun^*; Feng, Zhenghe

来源：Microwave and Optical Technology Letters, 2014, 56(10): 2398-2403.

DOI：10.1002/mop.28605

• circular polarization
• wideband
• metallic cavity antenna
• strong power-handling capability

In this letter, a wideband circularly polarized metallic cavity antenna is designed and fabricated. To enhance both the impedance and axial-ratio bandwidths (ARBWs), an L-shaped probe is used to produce two orthogonal TE111 modes for left-hand circular polarization. The measured impedance bandwidth for S-11 <= -10 dB and 3-dB ARBW were 1.72 GHz (20.6%, 7.48-9.2 GHz), and 1.5 GHz (17.3%, 7.9-9.4 GHz), respectively. The measured realized gain at broadside was 6.6-9.3 dBic over the overlapped impedance and AR bandwidth 1.38 GHz (16.1%, 7.9-9.28 GHz). The experimental results reveal that the proposed antenna is attractive for satellite communication applications due to its simple metallic structure, good performance, and strong power-handling capability.

• 出版日期2014-10
• 单位清华大学