Characterisation of a D-Band Horn Antenna: Comparison of Near-Field and OTA Measurements
2024 18th European Conference on Antennas and Propagation (EuCAP)(2024)
摘要
The small wavelength, typically in the range of millimeters to micrometers, makes characterisation of antennas at sub-THz band particularly challenging as it requires measurement systems to accurately capture the details of the antenna radiation patterns. Additionally, sub-THz signals experience significant free-space path loss, making it harder to measure radiation patterns accurately over reasonable distances. This paper presents the characterisation of a D-band (110–170 GHz) horn antenna having nominal gain of 25 dBi using both planar near-field and over-the-air far-field measurement techniques. The E-plane co-polar patterns are determined from both measurement techniques and compared to electromagnetic simulations. Analysis of measured results is carried out to illustrate the validation of the planar near-field and OTA measurement systems at sub-THz frequencies.
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关键词
antenna measurement,far-field pattern,planar near-field measurement,robotics,sub-THz,6G
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