科研之友
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摘要
A novel single-fed, wideband, circularly polarized slot antenna is proposed and fabricated. Wideband circular polarization is obtained by introducing an antipodal Y-strip to a square slot antenna. The feedline is a U-shaped microstrip line that provides a wide impedance bandwidth. The overall size of the antenna is only 28 x 28 mm(2) (0.3 lambda(o) x 0.3 lambda(o)). A prototype of the antenna is fabricated and tested. The measured bandwidths for the axial ratio (AR < 3 dB) and relative impedance (vertical bar S-11 vertical bar < -10 dB) are 41.3% (from 4.4 to 6.67 GHz) and 84% (from 3.25 to 8 GHz), respectively, and the antenna has a stable radiation pattern and a gain of greater than 3 dBi over the entire circular polarization frequency band.
- 出版日期2017
