A low noise Ka-band amplifier for radio astronomy

A low noise Ka-band amplifier for radio astronomy

We present the designs for and the results of a prototype cryogenic Ka-band low noise amplifier (LNA), that is based on the hybridization of microwave integrated circuits (MICs) and monolithic microwave integrated circuits (MMICs). The resulting transistor plus MMIC (T+MMIC) 5 stage LNA, has a peak...

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Hauptverfasser: McCulloch, M., Blackhurst, E., Davis, R., Galtress, A., George, D., Melhuish, S., Piccirillo, L.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
astronomy
Cryogenics
HEMTs
indium phosphide
low-noise amplifiers
microwave integrated circuits
Microwave transistors
Millimeter wave transistors
MMICs
Noise
Transistors
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Beschreibung
Zusammenfassung:We present the designs for and the results of a prototype cryogenic Ka-band low noise amplifier (LNA), that is based on the hybridization of microwave integrated circuits (MICs) and monolithic microwave integrated circuits (MMICs). The resulting transistor plus MMIC (T+MMIC) 5 stage LNA, has a peak gain of 52dB, a minimum noise temperature of 12K at an ambient temperature of ≈23K, and a 20% bandwidth of 27-33GHz. We outline the background behind the LNA, our measurement process, the LNA's performance, our future development plans and discuss the possible advantages that this amplifier layout may offer.
DOI:10.23919/EuMC.2012.6459187