一种改进的圆极化三角形口径耦合贴片天线

摘要

A modified broadband circular polarization triangular aperture-coupled patch antenna was presented and designed. The antenna was composed of an L-shaped strip, a triangular slot and a triangular patch. Circular polarization was formed by the L-shaped strip. Unidirectional radiation was achieved by the slot and the patch, which were printed on different substrates for gain enhancement and aperture size reduction. Meanwhile, a corner of the patch was cut to improve the circular polarization performance. An aperture-coupled patch antenna for L band was designed by HFSS software. Results reveal that the impedance bandwidth and circular polarization bandwidth are 26.5%and 22.5%, respectively. The average gain is 7.7 dB.%提出并设计了一种改进的宽带圆极化三角形口径耦合微带贴片天线。该天线由L形微带线、三角形缝隙和三角形贴片组成。通过L形微带线形成圆极化，三角形缝隙和三角形贴片形成单向辐射，缝隙和贴片印刷在不同的介质基片上以提高天线增益并缩减口径尺寸，同时在三角形贴片上切去一个角改善天线的圆极化特性。用 HFSS 设计了一款L波段的口径耦合贴片天线。仿真结果表明，天线的阻抗带宽26.5%，圆极化带宽22.5%，平均增益7.7 dB。