Characterisation of a D-Band Horn Antenna: Comparison of Near-Field and OTA Measurements
Husein, Asad; Rasilainen, Kimmo; Nevala, Klaus; Kallankari, Jani; Laukkanen, Sami; Niemitalo, Veli-Matti; Pärssinen, Aarno; Leinonen, Marko E. (2024-04-26)
IEEE
26.04.2024
A. Husein et al., "Characterisation of a D-Band Horn Antenna: Comparison of Near-Field and OTA Measurements," 2024 18th European Conference on Antennas and Propagation (EuCAP), Glasgow, United Kingdom, 2024, pp. 1-5, doi: 10.23919/EuCAP60739.2024.10501356
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© 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists,or reuse of any copyrighted component of this work in other works.
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202405203707
https://urn.fi/URN:NBN:fi:oulu-202405203707
Tiivistelmä
Abstract
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.
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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