A Compact Multiband Monopole Antenna With a Defected Ground Plane

被引：86

作者：

Antoniades, Marco A. ^{[1
]}

Eleftheriades, George V. ^{[1
]}

机构：

[1] Univ Toronto, Edward S Rogers Sr Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2008年 / 7卷 / 652-655期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Defected ground plane; multiband; planar monopole antenna; ultrawideband (UWB) antenna;

D O I：

10.1109/LAWP.2008.2007813

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 compact multiband antenna is proposed that consists of a printed circular disc monopole antenna with an L-shaped slot cut out of the ground, forming a defected ground plane. Analysis of the current distribution on the antenna reveals that at low frequencies the addition of the slot creates two orthogonal current paths, which are responsible for two additional resonances in the response of the antenna. By virtue of the orthogonality of these modes the antenna exhibits orthogonal pattern diversity, while enabling the adjacent resonances to be merged, forming a wideband low-frequency response and maintaining the inherent wideband high-frequency response of the monopole. The antenna exhibits a measured -10 dB S-11 bandwidth of 600 MHz from 2.68 to 3.28 GHz, and a bandwidth of 4.84 GHz from 4.74 to 9.58 GHz, while the total size of the antenna is only 24 x 28.3 mm. The efficiency is measured using a modified Wheeler cap method and is verified using the gain comparison method to be approximately 90% at both 2.7 and 5.5 GHz.

引用

页码：652 / 655

页数：4

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