This work presents the design realization and performance of a 7-element prototype array of corrugated feedhorns in W-band. The module is fabricated using a so-called “platelet” technique by milling Aluminum plates. This technique is suitable for low-cost and scalable high performance applications. Room temperature Return Loss measurements show a low (<-30 dB) reflection over a 20% bandwidth with a maximum matching of -40 dB at 105 GHz for all seven antennas. Beam pattern measurements indicate good repeatability and a low (-30 dB) sidelobe levels. This work is particularly relevant for future Cosmic Microwave Background polarisation measurements, which require large microwave cryogenic detector arrays coupled to high performance corrugated feed horns.
CORRUGATED FEED-HORN ARRAYS FOR FUTURE CMB POLARIZATION EXPERIMENTS / F. Del Torto ; tutor: M. Bersanelli ; co-tutor: F. Villa. UNIVERSITA' DEGLI STUDI DI MILANO, 2012 Jul 18. 24. ciclo, Anno Accademico 2011. [10.13130/del-torto-francesco_phd2012-07-18].
CORRUGATED FEED-HORN ARRAYS FOR FUTURE CMB POLARIZATION EXPERIMENTS.
F. DEL TORTO
2012
Abstract
This work presents the design realization and performance of a 7-element prototype array of corrugated feedhorns in W-band. The module is fabricated using a so-called “platelet” technique by milling Aluminum plates. This technique is suitable for low-cost and scalable high performance applications. Room temperature Return Loss measurements show a low (<-30 dB) reflection over a 20% bandwidth with a maximum matching of -40 dB at 105 GHz for all seven antennas. Beam pattern measurements indicate good repeatability and a low (-30 dB) sidelobe levels. This work is particularly relevant for future Cosmic Microwave Background polarisation measurements, which require large microwave cryogenic detector arrays coupled to high performance corrugated feed horns.File | Dimensione | Formato | |
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