Cold-Source Noise Measurement of a Differential Input Single-Ended Output Low-Noise Amplifier Connected to a Low-Frequency Radio Astronomy Antenna

Abstract

We present two methods for measuring the noise temperature of a differential input single-ended output (DISO) Low-Noise Amplifier (LNA) connected to an antenna. The first method is direct measurement of the DISO LNA and antenna in an anechoic chamber at ambient temperature. The second is a simple and low-cost noise parameter extraction of the DISO device using a coaxial long cable. The reconstruction of the DISO noise parameter from the noise wave measurements of the DISO LNA with one terminated input port is discussed in detail. We successfully applied these methods to the Murchison Widefield Array LNA and antenna.

arXiv commentIEEE Trans. Antennas. Propagat., accepted, 24 June 2018. 10 pages, 16 figures

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Cited by in corpus (4)

• Source counts and confusion at 72-231 MHz in the MWA GLEAM survey
• Noise Temperature of Phased Array Radio Telescope: The Murchison Widefield Array and the Engineering Development Array
• Sensitivity of a Low-Frequency Polarimetric Radio Interferometer
• System equivalent flux density of a low-frequency polarimetric phased array interferometer