Compact Homodyne Extrapolation System (CHEXS)

Published

October 27, 2024

Author(s)

Joshua Gordon, Benjamin Moser

Abstract

We present on a novel gain extrapolation antenna range, the Compact Homodyne Extrapolation System (CHEXS), that can achieve absolute antenna gain measurements with uncertainties of 0.1 dB or better with as few at 10 data points and is significantly more compact, up to six times shorter than conventional gain extrapolation ranges when three antennas are used. This compact gain extrapolation range achieves these beneficial attributes by measuring the homodyne signal that occurs naturally between two directional antennas that often exhibit strong third order mutual coupling at close proximity. The design and operation of the CHEXS is presented along with gain measurements of standard gain antennas which are shown to be equivalent to those obtained using a conventional gain extrapolation range.

Conference Dates

October 27-November 1, 2024

Conference Location

Cincinnati, OH, US

Conference Title

The​ ​46th​ ​Annual​ ​Meeting​ ​and​ ​Symposium​ ​of​ ​the​ ​Antenna​ ​Measurement​ ​Techniques Association (AMTA)

Pub Type

Conferences

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Citation

Gordon, J. and Moser, B. (2024), Compact Homodyne Extrapolation System (CHEXS), The​ ​46th​ ​Annual​ ​Meeting​ ​and​ ​Symposium​ ​of​ ​the​ ​Antenna​ ​Measurement​ ​Techniques Association (AMTA), Cincinnati, OH, US, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=958225 (Accessed October 13, 2025)