GaAs pHEMT broadband low-noise amplifier for millimeter-wave radiometer
✍ Scribed by B. Aja; M. L. de la Fuente; J. P. Pascual; M. Detratti; E. Artal
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 186 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
This paper describes a GaAs pHEMT low‐noise amplifier (LNA) in the 38–48 GHz frequency band, which has been developed for the radiometers of the ESA Planck mission. It demonstrates a stable LNA design using a potentially unstable device. The three‐stage amplifier with 0.15‐μm AlGaAs/InGaAs pHEMTs, exhibits more than 16‐dB gain and 1.8‐dB average noise figure over the entire frequency band. The minimum measured noise figure was 1.6 dB with an associated gain of 17.5 dB at 43 GHz. These results show the best noise performance demonstrated among all those reported for a broadband GaAs‐based LNA at these frequencies. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 39: 475–479, 2003