Design of ultra wideband trapezoidal shape slot antenna with circular polarization

被引：22

作者：

Krishna, R. V. S. Ram ^{[1
,2
]}

Kumar, Raj ^{[1
,2
]}

机构：

[1] DIAT Deemed Univ, Pune 411025, Maharashtra, India

[2] ARDE, Pune 411041, Maharashtra, India

来源：

AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS | 2013年 / 67卷 / 12期

关键词：

Monopole antenna; Slot antenna; CPW-feed; Circular polarization; Ultra wideband system; RATIO-BANDWIDTH ENHANCEMENT; UWB APPLICATIONS; GROUNDED STRIPS;

D O I：

10.1016/j.aeue.2013.06.005

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 CPW-feed printed slot antenna with circular polarization characteristics is presented in this paper. The basic structure of the antenna is a rectangular slot excited by a 50 2 CPW line terminated on a trapezoidal shaped tuning stub. Perturbations in the form of circular stubs are applied in the slot to realize circular polarization. The measured impedance bandwidth (S-11 <-10 dB) for the initial design is 4.4 GHz (from 2.2 GHz to 6.6 GHz) while the 3-dB axial ratio bandwidth is 1.77 GHz (from 4 GHz to 5.77 GHz) which is 36.23% at the center frequency of 4.88 GHz. The basic structure of the antenna was further modified to enhance the impedance bandwidth to reach well beyond 12 GHz while increasing the ARBW to 44.3% (from 4.3 GHz to 6.75 GHz). The proposed antenna in its final version has a measured peak gain of about 5 dB throughout the useful band and nearly stable radiation pattern. (C) 2013 Elsevier GmbH. All rights reserved.

引用

页码：1038 / 1047

页数：10

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