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Contactless Antenna Gain Pattern Estimation From Backscattering Coefficient Measurement Performed Within Reverberation Chambers

Abstract : This paper presents the antenna gain pattern estimation from backscattering coefficient measurement performed within a reverberation chamber (RC). The antenna backscattering coefficient is measured for two load conditions, namely an open circuit and a 50 Ω load, enabling to distinguish the radiation and structural modes from the total backscattered field. This approach is applied to the measurement of the gain pattern of a Vivaldi antenna at 6.5 GHz and compared to a conventional transmission-type measurement within an anechoic chamber. The main lobe of the radiation pattern is in good agreement between both measurements. The difference between maximal gains, retrieved after a reference measurement using a metallic plate, is equal to 0.04 dB. A second validation is performed using a log-periodic antenna at 3.5 GHz, showing less than 0.76 dB difference over the measured angular range. To the author's knowledge, this is the first time that a contactless gain pattern measurement is performed and validated within an RC.
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https://hal.archives-ouvertes.fr/hal-03352179
Contributor : Francois Sarrazin Connect in order to contact the contributor
Submitted on : Thursday, September 23, 2021 - 2:23:48 AM
Last modification on : Thursday, January 20, 2022 - 12:54:15 PM
Long-term archiving on: : Friday, December 24, 2021 - 6:12:15 PM

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Ariston Reis, Francois Sarrazin, Philippe Besnier, Philippe Pouliguen, Elodie Richalot. Contactless Antenna Gain Pattern Estimation From Backscattering Coefficient Measurement Performed Within Reverberation Chambers. IEEE Transactions on Antennas and Propagation, Institute of Electrical and Electronics Engineers, In press, ⟨10.1109/TAP.2021.3111184⟩. ⟨hal-03352179⟩

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