Browse Prior Art Database

Optimizing Performance of Radio Frequency Interference (RFI) Anechoic Chambers

IP.com Disclosure Number: IPCOM000103072D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 32K

Publishing Venue

IBM

Related People

Ball, JP: AUTHOR [+2]

Abstract

Disclosed is a technique that will allow a Radio Frequency Interference Anechoic Chamber to more closely simulate the theoretical site attenuation of an Open Area Test Site for use in making Radio Frequency Interference radiated measurements.

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Optimizing Performance of Radio Frequency Interference (RFI) Anechoic Chambers

      Disclosed is a technique that will allow a Radio Frequency
Interference Anechoic Chamber to more closely simulate the
theoretical site attenuation of an Open Area Test Site for use in
making Radio Frequency Interference radiated measurements.

      All practical Radio Frequency Interference Anechoic Chambers
have resonance problems.  These become measurement tolerance errors.
The lower the magnitude of resonance relative to the direct wave, the
better the chamber.  This disclosure greatly reduces this error.
Disclosed is a unique placement of the receive antenna in Radio
Frequency Interference Anechoic Chambers.  The receive antenna will
give the best performance when placed in a corner of the chamber
within one inch of the Radio Frequency Interference absorber material
and aimed at the opposite corner.  Test has shown a factor of two
improvement when the measurement location was moved to such a
position.  The typical position is symmetrically located at the
North-South axis of a square chamber.

      Disclosed anonymously.