We present the design and performance of a 2x2 prototype array of corrugated feed- horns in W-band. The module is fabricated using a so-called “platelet” technique by milling Alu- minum 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 30% band- width with a maximum matching of -42 dB at 100 GHz for all four antennas. Beam pattern mea- surements indicate good repeatability and a low (-25 dB) sidelobe and crosspolarisation 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.
W-band prototype of platelet feed-horn array for CMB polarisation measurements / F. Del Torto, M. R. F. Bersanelli, F. Cavaliere, A. De Rosa, O. D’Arcangelo, C. Franceschet, M. Gervasi, A. Mennella, E. Pagana, A. Simonetto, A. Tartari, F. Villa, M. Zannoni. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 6:6(2011), pp. P06009.P06009.1-P06009.P06009.14.
Titolo: | W-band prototype of platelet feed-horn array for CMB polarisation measurements |
Autori: | DEL TORTO, FRANCESCO (Primo) BERSANELLI, MARCO RINALDO FEDELE (Secondo) |
Parole Chiave: | microwave antennas ; detector design and construction technologies and materials ; instruments for CMB observations ; polarisation |
Settore Scientifico Disciplinare: | Settore FIS/05 - Astronomia e Astrofisica |
Data di pubblicazione: | 2011 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1088/1748-0221/6/06/P06009 |
Appare nelle tipologie: | 01 - Articolo su periodico |