An omni-directional array antenna composed of ring slots covered with metallic cylinders

Author

Shirnura, T. ; Yagi, Hiroki ; Karikorni, M.

Author_Institution

Nihon Dengyo Kosaku Co., Ltd., Saitama, Japan

Volume

4

fYear

2005

fDate

4-7 Dec. 2005

Abstract

An omni-directional antenna element using a ring slot as an exciter and a metallic cylinder as a radiator is proposed. The metallic cylinder behaves as a parasitic element so that the element can realize broad frequency bandwidth and a uniform omni-directional pattern. Using this element we have made a vertical array antenna for a 2GHz-band W-CDMA system. All elements of the antenna are fed by parallel feeding system, and this antenna realizes more than 10% frequency bandwidth. Nevertheless it has a relatively thin configuration and the radiation tilt angle can be precisely adjusted. In this paper the principles of the element and characteristics of the array are described.

Keywords

UHF antennas; antenna arrays; antenna feeds; antenna radiation patterns; slot antennas; 2 GHz; W-CDMA system; metallic cylinders; omnidirectional array antenna; parallel feeding system; radiation tilt angle; ring slots; vertical array antenna; Antenna arrays; Antenna feeds; Bandwidth; Dielectric substrates; Dipole antennas; Frequency; Microstrip; Multiaccess communication; Slot antennas; Yagi-Uda antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings

Print_ISBN

0-7803-9433-X

Type

conf

DOI

10.1109/APMC.2005.1606775

Filename

1606775