Uncertainties in the Estimation of the Gain of a Standard Gain Horn in the Frequency Range of 90 GHz to 140 GHz
2024 18th European Conference on Antennas and Propagation (EuCAP)(2024)
Abstract
This paper examines the validity of employing the Naval Research Laboratory's (NRL) on-axis gain calibration curves as a standard reference, as specified in the commercial Standard Gain Horn (SGH) antenna datasheets, for the frequency range of 90 GHz to 140 GHz for antenna gain measurements. We present a comprehensive analysis of the on-axis gain calibration curve characteristics and the dimensions of the SGH antenna by employing three different dimensional measurement techniques and quantifying the discrepancies in comparison to the on-axis calibration curve found in datasheets. Additionally, we demonstrate that inaccuracies in the dimensional data provided in the commercial SGH antenna datasheet can lead to a gain deviation of ±1 dB from the anticipated gain. We validate the on-axis gain curves obtained from simulation by conducting measurements in a spherical anechoic chamber.
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Key words
Anechoic chamber,measurements,mm-wave,on-axis gain curve,Standard Gain Horn (SGH)
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