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Design of active waveguide OMT for radio astronomy receiver array in the 3 mm band

: Navarrini, Alessandro; Valente, Giuseppe; Serres, Patrice; Schäfer, Frank; Thome, Fabian; Garnier, Olivier

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Consorzio Nazionale Interuniversitario per le Telecomunicazioni -CNIT-:
XXII RINEM 2018, Riunione Nazionale di Elettromagnetismo. Proceedings : September 3-6, 2018, Cagliari, Italy
Cagliari, 2018
ISBN: 978-88-907599-2-5
Riunione Nazionale di Elettromagnetismo (RINEM) <22, 2018, Cagliari>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IAF ()
Orthomode Transducer (OMT); MMIC; low-noise amplifier (LNA); integrated receiver; millimeter-wave radio astronomy

We describe the design of an integrated cryogenic receiver module based on an “active” waveguide Orthomode Transducer (OMT) for dual-polarization radio astronomy observations across 75-116 GHz (3-mm band). The receiver module consists of passive and active sections that can be incorporated in a very compact mechanical assembly suitable for integration in a focal plane array. The passive section of the receiver module employs a broadband backward-coupler waveguide OMT while the active section consists of ultra-low noise MMIC (Monolithic Microwave Integrated Circuit) amplifiers.