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电容耦合激励(CCS)的方法具有保持天线低剖面,有利于天线的匹配,容易进一步实现圆极化(CP)的优点。文章首先利用电容耦合馈电的概念,激励圆形微带贴片天线的TM01模式,设计实现具有低剖面水平全向振子类方向图的垂直线极化(LP)天线。然后,在圆形贴片加载四个臂枝节,提供具有等幅并90°相差的水平极化波,实现了一个水平全向圆极化GPS L1波段的振子型贴片天线。最后制作了天线实物,实测与仿真数据吻合良好,这类圆极化天线具有低剖面,易制作的优点,适合作GPS通信天线。
The method of capacitively coupled excitation (CCS) has the advantage of keeping the low profile of the antenna, facilitating the matching of the antenna and further facilitating the further realization of the circular polarization (CP). Firstly, the concept of capacitively coupled feeding is used to excite the TM01 mode of a circular microstrip patch antenna to design and implement a vertical linear polarization (LP) antenna with a low profile horizontal omnidirectional antenna pattern. Then, loading four arm branches in a circular patch to provide horizontal polarized waves with equal amplitude and 90 ° phase difference, a horizontal omnidirectional circular polarization GPS L1 band dipole antenna is realized. Finally, the antenna is made in kind, and the measured and simulated data are in good agreement. Such circularly polarized antennas have the advantages of low profile and easy fabrication, and are suitable for GPS communication antennas.