Pircher, Michael (2022) Development of a X-Band, Crosspolarization Compensating Feed Antenna for the Compact Test Range. Masterarbeit, Technische Universität München (TUM).
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Kurzfassung
In antenna measurements it is well known that single reflector and dual cylindrical reflector Compact Antenna Test Ranges (CATRs) suffer from a high cross-polarization level in the Quiet Zone (QZ). This limits their performance of measuring an Antenna under Test (AUT) with high cross-polar suppression. This issue is avoided by the development of a new three element feed array. The central horn antenna ensures the co-polar field, while the outer horns generate the so called conjugate matched field and hence reduce the cross-polarization. A nonlinear, numerical optimization is used to calculate the weighting factors of each element. It must consider also the limitations of the prototype-based feeding network. The feed array is capable of generating horizontally and vertically polarized waves and it operates in the X-band. The performance of the feed array is validated in High-Frequency Structure Simulator (HFSS) simulations, where an improvement of 8 dB in the cross-polar level is found in the QZ. A proof of concept demonstrator is measured in the Compact Test Range (CTR) of the Microwaves and Radar Institute of the German Aeorspace Center (DLR). A field probe scan shows a mean cross-polar level of −41.6 dB, over 9 dB better than the currently used reference. The cross-polarization is effectively reduced over a bandwidth of 900 MHz.
elib-URL des Eintrags: | https://elib.dlr.de/145874/ | ||||||||
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Dokumentart: | Hochschulschrift (Masterarbeit) | ||||||||
Titel: | Development of a X-Band, Crosspolarization Compensating Feed Antenna for the Compact Test Range | ||||||||
Autoren: |
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Datum: | März 2022 | ||||||||
Referierte Publikation: | Ja | ||||||||
Open Access: | Ja | ||||||||
Seitenanzahl: | 56 | ||||||||
Status: | veröffentlicht | ||||||||
Stichwörter: | CTR, cross-polarization, conjugate matched field | ||||||||
Institution: | Technische Universität München (TUM) | ||||||||
Abteilung: | Fakultät für Elektrotechnik, Lehrstuhl für Hochfrequenztechnik | ||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||
HGF - Programm: | Raumfahrt | ||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - SAR-Expert-Support-Lab | ||||||||
Standort: | Oberpfaffenhofen | ||||||||
Institute & Einrichtungen: | Institut für Hochfrequenztechnik und Radarsysteme > SAR-Technologie | ||||||||
Hinterlegt von: | Pircher, Michael | ||||||||
Hinterlegt am: | 30 Nov 2021 09:17 | ||||||||
Letzte Änderung: | 07 Okt 2022 16:42 |
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