Preliminary design of 18-45 GHz radio astronomy receiver

Sitwala Mundia; Aletha De Witt; Fanie van den Heever; Sias Malan; Tinus Stander

doi:10.1117/12.2562026

13 December 2020 Preliminary design of 18-45 GHz radio astronomy receiver

Sitwala Mundia, Aletha De Witt, Fanie van den Heever, Sias Malan, Tinus Stander

Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X; 1145348 (2020) https://doi.org/10.1117/12.2562026
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The preliminary design and system simulation of an 18 - 45 GHz radio astronomy receiver is presented, planned for installation on the 26 m radio telescope at the Hartebeesthoek Radio Astronomy Observatory in South Africa. The receiver utilizes a sideband separating architecture with two local oscillator settings to cover the full frequency range. The receiver will deliver a 4-11 GHz output IF for each sideband. An analysis of the frequency plan and simulated performance using off-the-shelf components and target custom design specifications are discussed. A discussion on multi-chip module (MCM) and full monolithic integration towards miniaturized packaged ultra- wideband receivers for radio astronomy is also given. System simulations show ultra-wideband operation using two LO settings with the largest spurious signal at -40 dBc relative to the fundamental and an average noise figure of 1.8 dB at room temperature within the IF band. The simulated results show a minimum image rejection between the sidebands of 12 dB at the band edge of the IF.

Conference Presentation

Citation Download Citation

Sitwala Mundia, Aletha De Witt, Fanie van den Heever, Sias Malan, and Tinus Stander "Preliminary design of 18-45 GHz radio astronomy receiver", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 1145348 (13 December 2020); https://doi.org/10.1117/12.2562026

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