摘要
设计了一种共面波导（CPW）单端口馈电的圆形缝隙宽带圆极化（CP）印刷天线。该天线通过在圆形缝隙侧面附加圆形枝节，结合CPW端口伸出的激励带条，激励出一对相位差90°的差分正交简并模，从而辐射圆极化波。对天线模型进行了优化设计和实物加工，测试结果表明，该天线的轴比带宽（AR〈3dB）达到12．5％；最大增益为3．8dB，在轴比带宽内增益的变化幅度小于1dB。
A broadband circularly polarized circular slot antenna is designed with single coplanar waveguide fed. The proposed CP antenna is obtained by printing a drcular branch at the side of the circular slot for perturbation achieving a 90° phase difference of electric fidd comparing with the protruded feeding strip. The antenna proposed has been optimized and fabricated, and the bandwidths for AR 〈 3dB of 12.5% is achieved in the measurement. The maximum gain is 3.8 dB in the 3 dB AR bandwitdh, with gain variations less than 1dB.
出处
《通信对抗》
2008年第4期39-41,共3页
Communication Countermeasures
关键词
CPW
圆极化
圆形缝隙
印刷天线
CPW
circulary polarized
circular slot
printed antenna
