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

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Authors
Sutinjo, Adrian
Ung, D.
Juswardy, Budi
Date
2018
Type
Journal Article

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Sutinjo, A. and Ung, D. and Juswardy, B. 2018. Cold-Source Noise Measurement of a Differential Input Single-Ended Output Low-Noise Amplifier Connected to a Low-Frequency Radio Astronomy Antenna. IEEE Transactions on Antennas and Propagation. 66 (10): pp. 5511-5520.
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IEEE Transactions on Antennas and Propagation
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Curtin Institute of Radio Astronomy (Physics)
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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.