Compact Dual-Polarization Cryogenic Receiver Module for the 75-116 GHz band
Date Issued
2018
Author(s)
•
•
Serres, Patrice
•
Schaefer, Franck
•
Thome, Fabian
•
Garnier, Olivier
Abstract
We describe the design of a highly 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 incorporated in three mechanical blocks arranged in a very compact assembly. The module has external dimensions of 43×25×35 mm3; it includes a square waveguide input (size 2.54×2.54 mm2) and two standard WR10 waveguide outputs
(size 1.27×2.54 mm2) parallel to the input waveguide, 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 two ultra-low noise MMIC (Monolithic Microwave Integrated Circuit) amplifiers in
cascade, delivering a total gain of ≈45 dB for each of the polarization channels. The “active OMT” receiver will be cryogenically cooled at the physical temperature of ≈15 K. It is expected to provide state-of-the-art performance with noise in the range 25 to 50 K across 75-116 GHz. The module
incorporates a DC power supply board along with discrete capacitors, resistors, and a DC bias connector for biasing the MMIC amplifiers.
Coverage
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)
Start page
479
Conferenece
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)
Conferenece place
Cartagena des Indias, COLOMBIA
Conferenece date
10-14 September, 2018
Rights
open.access
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