科研之友
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摘要
This letter presents a P-band dual-circularpolarization antenna array based on a flexible substrate. The antenna is excited by two orthogonal H-shaped slots etched on the ground plane. By feeding different ports of the three-stub hybrid coupler, different circular-polarization characteristics can be obtained. Measured results show that the frequency bandwidth of the antenna arraywith voltage standing-wave ratio less than 1.6 is 350-510 MHz, and the 3-dB axial-ratio bandwidth at least ranges from 400 to 460 MHz. The measured gain for the antenna arrays with 6 x 8 elements is 22.2 dBic at the frequency of 433 MHz. Asix-way power divider and phase-shift network are adopted to investigate the beam scanning performance. Measured results indicate that the main beam can be scanned from theta = 0 degrees to theta = -18.5 degrees in the yz plane with good radiation consistency.
- 出版日期2017
- 单位上海宇航系统工程研究所; 复旦大学
