Side wall diffraction & optimal back wall design in elongated chambers for far–field antenna measurements at VHF/UHF frequencies

Author

Aubin, John ; Winebrand, Mark

Author_Institution

ORBIT/FR Inc., Horsham, PA, USA

fYear

2010

fDate

11-17 July 2010

Firstpage

1

Lastpage

4

Abstract

The side wall diffraction has been studied in elongated rectangular and tapered anechoic chambers at VHF/UHF bands. Methods for diffraction reduction were suggested. The concept of side wall diffraction is examined and trade-offs are identified. Optimal back wall design methods are suggested. It is shown that reflectivity improvement of greater than 10 dB can be effectively achieved with a pyramidal shape absorptive back wall, thus extending the chamber operation to lower frequencies.

Keywords

UHF antennas; VHF antennas; anechoic chambers (electromagnetic); electromagnetic wave diffraction; electromagnetic wave reflection; VHF-UHF frequency band; elongated rectangular anechoic chambers; far-field antenna measurements; optimal back wall design; pyramidal shape absorptive back wall; side wall diffraction reduction; tapered anechoic chambers; Anechoic chambers; Antenna measurements; Diffraction; Frequency measurement; Reflection; Reflectivity; UHF measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE

Conference_Location

Toronto, ON

ISSN

1522-3965

Print_ISBN

978-1-4244-4967-5

Type

conf

DOI

10.1109/APS.2010.5562157

Filename

5562157