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- W4376607974 abstract "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- <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$Omega $ </tex-math></inline-formula> system, the LNA exhibits a return loss (RL) of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$>$ </tex-math></inline-formula> 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 <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$T_{text {min}} approx 13 pm $ </tex-math></inline-formula> 4 K and noise temperatures <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$T_{50,Omega } approx 18 pm $ </tex-math></inline-formula> 6 K between 0.5 and 1.4 GHz." @default.
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- W4376607974 date "2023-08-01" @default.
- W4376607974 modified "2023-10-07" @default.
- W4376607974 title "0.3–1.5-GHz LNA With Wideband Noise and Power Matching for Radio Astronomy" @default.
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- W4376607974 doi "https://doi.org/10.1109/lmwt.2023.3272211" @default.
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