Design and analysis of the NRC Q-band receiver for ngVLA Band-5

S. Salem Hesari; D. Henke; V. Reshetov; B. Veidt; A. Seyfollahi; F. Jiang; L. B. G. Knee

doi:10.1117/12.2627870

31 August 2022 Design and analysis of the NRC Q-band receiver for ngVLA Band-5

S. Salem Hesari, D. Henke, V. Reshetov, B. Veidt, A. Seyfollahi, F. Jiang, L. B. G. Knee

Proceedings Volume 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI; 121900L (2022) https://doi.org/10.1117/12.2627870
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

The radio instrumentation team (RIT) at NRC’s (National Research Council Canada) Herzberg astronomy and astrophysics research center (HAA) is currently developing a dual-linear polarization, single-feed Q-band cryogenic radio astronomy receiver to develop and demonstrate important technologies needed for front-end development for the next generation very large array (ngVLA) project lead by the National Radio Astronomy Observatory (NRAO). The specific target is the ngVLA band-5 receiver, which covers the frequency range 30.5–50.5 GHz. It also serves as a technology demonstrator for component development for ngVLA bands-3, 4, and 6. The Q-band receiver system is designed to achieve a receiver noise temperature of less than 20 K over 70% of the bandwidth and better than 24 K over the complete operating bandwidth, and is compliant with the current ngVLA Band-5 receiver requirement. The receiver system consists of a cryostat with a cooled feed horn, a turnstile OMT (orthomode transducer) plus two noise couplers for calibration, two cryogenic mHEMT low noise amplifiers with noise temperature lower than 14 K, IR filters, and a vacuum window for low-loss transmission of electromagnetic fields into the cryostat.

Citation Download Citation

S. Salem Hesari, D. Henke, V. Reshetov, B. Veidt, A. Seyfollahi, F. Jiang, and L. B. G. Knee "Design and analysis of the NRC Q-band receiver for ngVLA Band-5", Proc. SPIE 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, 121900L (31 August 2022); https://doi.org/10.1117/12.2627870

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KEYWORDS

Receivers

Optical filtering

Waveguides

Cryogenics

Antennas

Calibration

Amplifiers

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