Development and characterisation of an anechoic chamber

Woods, Andrew (2006) Development and characterisation of an anechoic chamber. [USQ Project]


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This project explores the testing procedures in which the anechoic chamber, located on
level 2 of the Faculty of Engineering and Surveying building at the University of
Southern Queensland, can be characterised in the way of its performance regarding
electromagnetic compatibilities. This characterisation will help further users of the
anechoic chamber better understand the results in which are obtained within the
chamber as well as know the interference that could be caused by the leakage of signals
coming from the chamber.
The performance characteristics that will be looked at are first of all the ability for the
anechoic chamber to keep environmental noise from entering the chamber walls,
creating false measurements, preventing harmful signals escaping and interfering with
other commercial bandwidths.
Then the pyramidal absorbers themselves will be analysed and their capability of
attenuating a wide range of frequencies over a set number of angles of incidences will
be recorded. This is the first step in a bigger task of being able to explain the patterns of
variation in the electromagnetic field in a two dimensional plane. The way in which the
performance of the pyramidal absorbers varies with angle helps explain this, as it gives
the magnitude of absorption when a wave is reflected off the wall and interferes with
the direct path, This process of following the different paths around the enclosed area is
called ray tracing which is touched on in this project, but due to time constraints only
the theory of the technique is recalled.
From the results that were obtained, the anechoic chamber can now be utilised as to get
a more accurate measurement by being able to configure the testing specifications to
suit the chambers performance strengths and weaknesses. Even though some
characterisation has been logged, there is still the potential for further work to be done
to optimise the anechoic chambers useability and hopefully someday match the
standards set for a commercial anechoic chamber.

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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering (Up to 30 Jun 2013)
Date Deposited: 11 Oct 2007 01:04
Last Modified: 02 Jul 2013 22:43
Uncontrolled Keywords: anechoic chamber; radio wave; ferrite tiles; logarithmic antenna; bi-conical antenna; electro-magnetic compatibility (EMC)
Fields of Research (2008): 10 Technology > 1005 Communications Technologies > 100501 Antennas and Propagation
09 Engineering > 0906 Electrical and Electronic Engineering > 090699 Electrical and Electronic Engineering not elsewhere classified
Fields of Research (2020): 40 ENGINEERING > 4006 Communications engineering > 400601 Antennas and propagation
40 ENGINEERING > 4008 Electrical engineering > 400899 Electrical engineering not elsewhere classified

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