Analysis and design of a circumferential wide slot cut on a thin cylinder for mobile base station antennas

Author

Hirokawa, J. ; Sumikawa, S.-i. ; Ando, M. ; Goto, N.

Author_Institution

Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Japan

fYear

1993

fDate

June 28 1993-July 2 1993

Firstpage

1842

Abstract

The input impedance and the radiation pattern of a circumferential slot fed at the center by an open-ended feed line are analyzed. It is cut on a thin circular cylinder as an element of a mobile base station antenna. Galerkin´s method of moments with delta-gap excitation almost succeeds in simulating the input impedance at the feed point and the radiation pattern. Model antennas have been designed in the 3 GHz band. The radiation patterns in the horizontal plane are shown; symmetrical patterns are obtained.<>

Keywords

Galerkin method; antenna feeds; antenna radiation patterns; electric impedance; land mobile radio; method of moments; microwave antennas; slot antennas; 3 GHz; Galerkin´s method of moments; SHF; UHF; circumferential wide slot; delta-gap excitation; input impedance; mobile base station antenna; open-ended feed line; radiation pattern; symmetrical patterns; thin circular cylinder; Antenna arrays; Base stations; Coaxial components; Conductors; Feeds; Frequency; Integral equations; Mobile antennas; Slot antennas; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1993. AP-S. Digest

Conference_Location

Ann Arbor, MI, USA

Print_ISBN

0-7803-1246-5

Type

conf

DOI

10.1109/APS.1993.385562

Filename

385562