A Polarization Reconfigurable Patch Antenna With Loop Slots on the Ground Plane

被引：122
作者：
Yang, Xue-Xia [1 ]
Shao, Bing-Cheng [1 ]
Yang, Fan [2 ,3 ]
Elsherbeni, Atef Z. [2 ]
Gong, Bo [1 ]
机构：
[1] Shanghai Univ, Sch Commun & Informat Engn, Shanghai 200072, Peoples R China
[2] Univ Mississippi, Dept Elect Engn, University, MS 38677 USA
[3] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2012年 / 11卷
关键词：
Microstrip antenna; polarization agility; reconfigurable antenna; slotted ground plane; MICROSTRIP ANTENNA;
D O I：
10.1109/LAWP.2011.2182595
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This letter proposes a reconfigurablemicrostrip patch antenna with polarization states being switched among linear polarization (LP), left-hand (LH) and right-hand (RH) circular polarizations (CP). The CP waves are excited by two perturbation elements of loop slots in the ground plane. A p-i-n diode is placed on every slot to alter the current direction, which determines the polarization state. The influences of the slots and p-i-n diodes on antenna performance are minimized because the slots and diodes are not on the patch. The simulated and measured results verified the effectiveness of the proposed antenna configuration. The experimental bandwidths of the 10-dB reflection coefficient for LHCP and RHCP are about 60 MHz, while for LP is about 30MHz. The bandwidths of the 3-dB axial ratio for both CP states are 20 MHz with best value of 0.5 dB at the center frequency on the broadside direction. Gains for two CP operations are 6.4 dB, and that for the LP one is 5.83 dB. This reconfigurable patch antenna with agile polarization has good performance and concise structure, which can be used for 2.4 GHz wireless communication systems.
引用
收藏
页码：69 / 72
页数：4
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