Broadband Circularly Polarized Patch Antenna With Parasitic Strips
Broadband Circularly Polarized Patch Antenna With Parasitic Strips
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DOI：
10.1109/lawp.2014.2373823
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发表时间：
2015-01-01
影响因子：
4.2
通讯作者：
Lian, Ruina
中科院分区：
文献类型：
--
作者：
Wu, Jianjun;Yin, Yingzeng;Lian, Ruina
提出了一种适用于宽带圆极化的带寄生条带贴片天线。为了扩大原角截断贴片的轴比(AR)带宽，在贴片周围依次旋转和缝隙耦合四条寄生条带。利用馈电探头顶部带有一个小圆盘的电容耦合馈电来获得较宽的阻抗匹配带宽。此外，在天线的中心位置放置了另一个圆盘加载短路销，以调整斜视波束并提高+z轴方向的增益。测试结果表明，该天线的低剖面为0.13lambda(0)，对S-11垂直杆-10分贝，AR<；3分贝，平均增益8dBic，总带宽为24%(2.32-2.95 GHz)。
A patch antenna with parasitic strips is presented for wideband circular polarization. In order to broaden the axial-ratio (AR) bandwidth of the original corner-truncated patch, four parasitic strips are sequentially rotated and gap-coupled around the patch. A capacitive-coupled feed with a small disc on the top of the feeding probe is utilized to obtain a wide impedance-matching bandwidth. Moreover, another disc-loaded shorting pin is placed at the center of the antenna to adjust the squint beams and improve the gains along +z-axis. Measured results show that the proposed antenna with a low profile of 0.13 lambda(0) obtains a global bandwidth of 24% (2.32-2.95 GHz) for vertical bar S-11 vertical bar < -10 dB, AR < 3 dB, and average gain of 8 dBic.