Title :
A method of pattern measurement to cancel reflection waves in anechoic chamber
Author :
Nagatoshi, Mio ; Hirose, Masanobu ; Tanaka, Hiroki ; Kurokawa, Satoru ; Morishita, Hisashi
Author_Institution :
Nat. Defense Acad., Yokosuka
Abstract :
In the paper, we have shown that averaging the radiation patterns over several distances between two antennas is useful in order to reduce the influence of reflection waves, using simulation software FEKO. In the conditions with and without reflection waves we simulate the radiation patterns of the biconical antenna (the operation band is from 30 MHz to 300 MHz) in distance between antennas from 315 cm to 615 cm by 50 cm steps. Averaging the radiation patterns is useful for reducing the influence of the reflection waves in an anechoic chamber. We will apply the proposed method to various antennas, and determine the optimum averaging number, distance, and steps.
Keywords :
UHF antennas; VHF antennas; anechoic chambers (electromagnetic); antenna radiation patterns; conical antennas; electromagnetic wave reflection; FEKO simulation software; anechoic chamber; biconical antenna; distance 315 cm to 615 cm; distance 50 cm; frequency 30 MHz to 300 MHz; pattern measurement; radiation patterns; reflection waves cancelleation; Anechoic chambers; Antenna measurements; Antenna radiation patterns; Conducting materials; Defense industry; Fourier transforms; Length measurement; Optical reflection; Reflector antennas; Wavelength measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4619826
