Analysis of skew antenna around a square tower for UHF TV broadcasting

Author

Shimizu, Yasusada ; Shigeta, Kazuo ; Yukawa, Iuyoshi ; Nakamura, Takashi ; Mikkaichi, Masashi ; Nagasawa, Yoji ; Sato, Risaburo

Author_Institution

Furukawa Electr. Co., Ltd., Kanagawa, Japan

Volume

36

Issue

7

fYear

1988

fDate

7/1/1988 12:00:00 AM

Firstpage

927

Lastpage

935

Abstract

The authors discuss the installation and characteristics of a UHF skew antenna mounted on a tower that already supports seven other VHF arrays used for TV broadcasting. The skew antenna consists of four antenna arrays arranged in a circle with a radius of about 3 m and radiating tangentially. The phase difference between the antenna arrays is 90 degrees . The skew antenna system produces a good omnidirectional pattern, but when located on the tower the reflections from the flat face and the wedge diffractions modify the pattern. The calculation of the horizontal radiation pattern using the geometrical theory of diffraction is compared with the measured pattern. Both the UHF antenna´s radiation pattern and its mutual interference are compared with the existing VHF antennas.<>

Keywords

antenna arrays; antenna radiation patterns; broadcast antennas; television antennas; 488 to 494 MHz; TV broadcasting; UHF; antenna arrays; geometrical theory of diffraction; horizontal radiation pattern; mutual interference; omnidirectional pattern; skew antenna; square tower; stacked loop antenna; Antenna arrays; Antenna radiation patterns; Diffraction; Microwave antenna arrays; Phased arrays; Poles and towers; Reflection; Reflector antennas; TV broadcasting; UHF antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.7197

Filename

7197