Gordon, J.
and Moser, B.
(2024),
Enhanced Gain Extrapolation Technique: a third-order scattering approach for high-accuracy antenna gain, sparse sampling, at Fresnel distances, IEEE Transactions on Antennas and Propagation, [online], https://doi.org/10.1109/TAP.2024.3478330, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=957876
(Accessed January 17, 2025)
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Enhanced Gain Extrapolation Technique: a third-order scattering approach for high-accuracy antenna gain, sparse sampling, at Fresnel distances
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Abstract
In this paper we describe an enhanced three-antenna gain extrapolation technique that allows one to determine antenna gain with significantly fewer data points and at closer distances than with the well-established traditional three-antenna gain extrapolation technique that has been in use for over five decades. As opposed to the traditional gain extrapolation technique, where high-order scattering is purposely ignored so as to isolate only the direct antenna-to-antenna coupling, we show that by incorporating third-order scattering the enhanced gain extrapolation technique can be obtained. The theoretical foundation using third-order scattering is developed and experimental results are presented comparing the enhanced technique and traditional technique for two sets of internationally recognized NIST reference standard gain horn antennas at X-band and Ku-band. We show that with the enhanced technique gain values for these antennas are readily obtained to within stated uncertainties of ±0.07 dB using as few as 10 data points per antenna pair, as opposed to ≈ 4000 -to- 8000 data points per antenna pair that is needed with the traditional technique. Furthermore, with the described enhanced technique, antenna-to-antenna distances can be reduced by a factor of three, and up a factor of six in some cases, compared to the traditional technique — a significant reduction in the overall size requirement of facilities used to perform gain extrapolation measurements.Citation
IEEE Transactions on Antennas and Propagation
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Keywords
Antenna, antenna gain, gain, gain extrapolation, sparse measurements.
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Created October 17, 2024, Updated January 2, 2025