Reducing FM broadcast energy consumption using directional radiation pattern

College

Gokongwei College of Engineering

Department/Unit

Electronics And Communications Engg

Document Type

Article

Source Title

ARPN Journal of Engineering and Applied Sciences

Volume

10

Issue

15

First Page

6484

Last Page

6490

Publication Date

1-1-2015

Abstract

Much energy is saved in the daily operation of FM broadcast stations if the transmitting antenna system employed transmits RF signal only in directions where the signal is wanted. Most FM broadcasters employ antenna systems that radiate equally in all directions or having an omnidirectional pattern on the horizontal plane. In most cities where broadcast stations operate, the target population is located only in some directions from the antenna location and definitely not around it. The use of correct radiation patterns in FM broadcasting is very important to assure that every RF energy emitted by the transmitter is received only within the target areas and not to be wasted in directions where the signal is not needed. This paper presents a method of producing directional patterns that are suitable for FM broadcast applications with simple implementation. These patterns are shaped by varying the physical distance and the phase relationship of two basic antennas called bays in uniform linear array. The bay used in the array is the shunt-fed, slanted dipole commonly used in FM broadcasting. Computer simulations show that the patterns presented in this paper have sufficient gains in certain directions, greater beamwidth and sidelobe-free. Though only two control factors are used in shaping the radiation pattern of the array, several patterns can still be produced that find practical applications in FM broadcasting. © 2006-2015 Asian Research Publishing Network (ARPN).

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Disciplines

Electrical and Electronics | Systems and Communications

Keywords

FM broadcasting; Antenna radiation patterns

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