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
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
收藏
页码:1163 / 1166
页数:4
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