Wideband Inverted-L Microstrip-via-Fed Circularly Polarized Antenna with Asymmetrical Ground for WLAN/Wimax Applications

被引：9

作者：

Chen, Qiang ^{[1
]}

Zhang, Hou ^{[1
]}

Yang, Lu-chun ^{[2
]}

Li, Bin-bin ^{[1
]}

Min, Xue-liang ^{[1
]}

机构：

[1] Air Force Engn Univ, Sch Air & Missile Def, Xian 710051, Shaanxi, Peoples R China

[2] China Mobile Shenzhen Ltd, Shenzhen 518048, Guangdong, Peoples R China

来源：

FREQUENZ | 2018年 / 72卷 / 7-8期

基金：

中国国家自然科学基金;

关键词：

wideband; circularly polarized; monofilar spiral; Wimax/WLAN; SQUARE SLOT ANTENNA; BROAD-BAND; MONOPOLE ANTENNA; BANDWIDTH;

D O I：

10.1515/freq-2017-0075

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：

A design with wideband and circularly polarized radiation antenna from an open-slot antenna has been demonstrated in this paper. The proposed antenna, which consists of an open slot and an inverted-L strip feeding, provides a large bandwidth, which completely cover the Wimax (3.3-3.8 GHz) and WLAN (2.4-2.48 GHz) bands. The open slot is formed by an modified ground plane with a slit cut and monofilar spiral stubs employed, which fed by an asymmetrical inverted-L strip feedline using a via. As demonstrated, the CP operation was significantly improved by loading monofilar spiral stubs connected to the asymmetric feedline by means of a via. A parametric study of the key parameters is made and the mechanism for circular polarization is described. After optimization, the impedance bandwidth is approximately 3.78 GHz (2.12 to 5.9 GHz) and the 3 dB axial ratio bandwidth is approximately 2.75 GHz (2.2 to 4.95 GHz), which represent fractional bandwidths of approximately 94.3% and 76.9%, respectively.

引用

页码：333 / 341

页数：9

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