Title :
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
fDate :
June 28 1993-July 2 1993
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;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1993. AP-S. Digest
Conference_Location :
Ann Arbor, MI, USA
Print_ISBN :
0-7803-1246-5
DOI :
10.1109/APS.1993.385562
