Wideband ultralow-noise cryogenic InP IF amplifiers for the Herschel mission radiometers

Isaac Lopez-Fernandez; Juan Daniel Gallego-Puyol; Carmen Diez; Alberto Barcia; Jesus Martin-Pintado

doi:10.1117/12.459177

17 February 2003 Wideband ultra-low noise cryogenic InP IF amplifiers for the Herschel mission radiometers

Isaac Lopez-Fernandez, Juan Daniel Gallego-Puyol, Carmen Diez, Alberto Barcia, Jesus Martin-Pintado

Proceedings Volume 4855, Millimeter and Submillimeter Detectors for Astronomy; (2003) https://doi.org/10.1117/12.459177
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The sub-millimeter radiometers of the Herschel mission have very stringent requirements. The scientific goals require an instantaneous bandwidth of four GHz with very low noise, flat gain and low power dissipation. Short-term gain stability of the amplifier is important, because gain fluctuations could limit the sensitivity of the instrument. Besides, a highly reliable, low weight unit is required to be compatible with the space instrumentation standards. The amplifiers will be used in conjunction with HEB and SIS mixers in all 7 channels of the instrument. This paper describes the design, the special construction techniques and the results of the amplifiers built by Centro Astronómico de Yebes for the development model of the Herschel Heterodyne Instrument. The average noise temperature obtained in the 4-8 GHz band is 3.5 K, with a gain of 27 ±1.1 dB at an ambient temperature of 15 K and keeping the total power dissipation below the allowed 4 mW. Normalized gain fluctuations were carefully measured, being lower than 1.5·10^-4 Hz^-1/2 @ 1 Hz. Space qualification of the design is in progress.

Citation Download Citation

Isaac Lopez-Fernandez, Juan Daniel Gallego-Puyol, Carmen Diez, Alberto Barcia, and Jesus Martin-Pintado "Wideband ultra-low noise cryogenic InP IF amplifiers for the Herschel mission radiometers", Proc. SPIE 4855, Millimeter and Submillimeter Detectors for Astronomy, (17 February 2003); https://doi.org/10.1117/12.459177

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