宽带双圆极化微带天线的设计

2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT) Pub Date : 2012-05-05 DOI:10.1109/ICMMT.2012.6230166

Zong-Quan Liu, Z. Qian, Z. Han, Weimin Ni

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引用次数: 1

摘要

为了满足具有多模卫星导航功能的移动终端的设计需求，设计了一种新型宽带双圆极化微带天线。该天线由改进的平面倒f天线(PIFA)和与PIFA同侧的带方形支路的地组成。双支路PIFA提高了阻抗带宽。在地面上加入一个方形支路，通过改变电流分布实现圆极化。在地面对角线上对称放置两个PIFA结构，实现双圆偏振。测量结果表明，回波损耗小于-10dB的两个端口带宽分别为1.22GHz~ 2.04GHz和1.23GHz~2.05GH。AR(轴比)< 3dB的带宽为1.2GHz~1.95GHz，相对带宽为49.2%。端口间隔离度大于17dB。该天线带宽宽，结构紧凑，适用于多模卫星导航的移动终端。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Design of a wideband dual circularly polarized microstrip antenna

In order to meet the design demand of mobile terminal with function of multi-mode satellite navigation, a new wideband dual-circular-polarization microstrip antenna is designed. The antenna consists of modified planar inverted-F antenna (PIFA) and a ground with a quadrate branch which is in the same side with PIFA. The impedance bandwidth is improved by dual-branch PIFA. Circular polarization is realized by modification of current distribution when a quadrate branch is added to the ground. Two PIFA structures are placed symmetrically on the diagonal of ground to realize dual circular polarization. The measured results show that the bandwidth of two ports in which return loss is less than -10dB is 1.22GHz~ 2.04GHz and 1.23GHz~2.05GH. The bandwidth for AR (axial ratio) <;3dB is 1.2GHz~1.95GHz with relative bandwidth of 49.2%. The isolation between two ports is larger than 17dB. The proposed antenna is suitable for mobile terminals in multi-mode satellite navigation for its wide bandwidth and compact structure.

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2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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