0.3-1.5-GHz LNA With Wideband Noise and Power Matching for Radio Astronomy

被引：3

作者：

Lai, Mark ^{[1
]}

MacKay, Vincent ^{[2
]}

Wulf, Dallas ^{[3
]}

Shmerko, Peter ^{[1
]}

Belostotski, Leonid ^{[1
]}

机构：

[1] Univ Calgary, Dept Elect & Software Engn, Calgary, AB T2N1N4, Canada

[2] Univ Toronto, Dept Phys, Toronto, ON M5G 2A2, Canada

[3] McGill Univ, Dept Phys, Montreal, PQ H3A 0G4, Canada

来源：

IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS | 2023年 / 33卷 / 08期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Low-noise amplifier (LNA); noise matching; radio astronomy; AMPLIFIER; DESIGN; GHZ;

D O I：

10.1109/LMWT.2023.3272211

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter presents a low-noise amplifier (LNA) that was developed for a new radio telescope comprised of 512 parabolic dish antennas. The LNA closely interfaces to a custom-made antenna feed with an impedance co-designed to provide noise matching over a 5:1 bandwidth (BW). Additionally, a method of broadband noise and power matching that allows the input impedance to be controlled independent of the optimum signal-source impedance to achieve minimum noise is also discussed. When measured in a 50- Omega system, the LNA exhibits a return loss (RL) of >8 dB between 0.32 and 1.5 GHz, S21 of 32 +/- 1.2 dB, IP1dB >-37 dBm, and IIP3 >-20 dBm. Noise parameter measurements show T-min approximate to 13 +/- 4 K and noise temperatures T-50 Omega approximate to 18 +/- 6 K between 0.5 and 1.4 GHz.

引用

页码：1163 / 1166

页数：4

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