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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A high-gain compact circularly polarized microstrip array antenna with simplified feed network
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A high-gain compact circularly polarized microstrip array antenna with simplified feed network

机译：具有简化馈电网络的高增益紧凑型圆极化微带阵列天线

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摘要

A broadband high-gain circularly polarized (CP) microstrip antenna operating in X band is proposed. The circular polarization property is achieved by rotating four narrow band linearly polarized (LP) microstrip patch elements in sequence. Since the conventional series-parallel feed network is not conducive to the miniaturization of the array, a corresponding simplified feed network is designed to realize the four-way equal power division and sequential 90 degrees phase shift. With this feed network, the impedance bandwidth (IBW) of the CP array is greatly improved compared with that of the LP element, while maintaining a miniaturized size. Then, parasitic patches are introduced to enhance the axial ratio bandwidth (ARBW). A prototype of this antenna is fabricated and tested. The size of proposed antenna is 0.93 lambda(0) x 0.93 lambda(0) x 0.017 lambda(0) (lambda(0) denotes the space wavelength corresponding to the center frequency 10.4 GHz). The measured 10-dB IBW and 3-dB ARBW are 13.6% (9.8-11.23 GHz), 11.2% (9.9-11.07 GHz) respectively, and peak gain in the overlapping band is 9.8 dBi.
机译：提出了一种在X波段工作的宽带高增益圆极化（CP）微带天线。通过依次旋转四个窄带线性极化（LP）微带贴片元件来实现圆极化特性。由于传统的串并联馈电网络不利于阵列的小型化，因此设计了相应的简化馈电网络以实现四路均等功率分配和连续90度相移。通过这种馈电网络，与LP元件相比，CP阵列的阻抗带宽（IBW）大大提高，同时保持了小型化。然后，引入寄生贴片以增强轴向比率带宽（ARBW）。制作并测试了该天线的原型。拟议天线的大小为0.93 lambda（0）x 0.93 lambda（0）x 0.017 lambda（0）（lambda（0）表示对应于中心频率10.4 GHz的空间波长）。测得的10 dB IBW和3 dB ARBW分别为13.6％（9.8-11.23 GHz），11.2％（9.9-11.07 GHz），并且重叠频段的峰值增益为9.8 dBi。

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