Antenna size reduction using Yagi-Uda loops and shorted circular patches

Author

Collins, Spencer ; Antar, Yahia M M

Author_Institution

Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Station Forces Kingston, Ont., Canada

Volume

52

Issue

3

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

855

Lastpage

864

Abstract

The reduction in the size of antennas for personal communication systems applications is a research area that is receiving lots of attention. The literature concentrates on reducing the size of microstrip patches however most of these antenna types require a large ground plane. Reducing the size of the ground plane has adverse affects on the antenna. To counter these affects a novel antenna type is presented. This antenna uses a shorted circular patch surrounded with nonplanar rings. These rings allow a reduction in the ground plane to a radius of less than 0.23 λ and improve its radiation characteristics. Through examination of the currents on the antenna, the principle of operation is explained based on a Yagi-Uda like array concept. Further theoretical and experimental examination confirms the above explanation.

Keywords

Yagi antenna arrays; antenna radiation patterns; loop antennas; microstrip antennas; personal communication networks; Yagi-Uda loops; loop antennas; microstrip antennas; nonplanar rings; personal communication systems applications; shorted circular patches; size control; Antenna arrays; Antenna radiation patterns; Microstrip antenna arrays; Microstrip antennas; Military computing; Personal communication networks; Radiation detectors; Receiving antennas; Size control; Wireless communication;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2003.820974

Filename

1288482