Flicker noise reduction using GaAs microwave feedforward amplifiers

This paper describes the analysis and design of a microwave feedforward power amplifier optimised for maximum close to carrier flicker noise suppression. Three amplifier topologies are analysed with respect to system noise figure and ease of production. Potential problems affecting error signal canc...

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Bibliographic Details
Main Authors: Broomfield, C.D., Everard, J.K.A.
Format: Conference Proceeding
Language:English
Subjects:
1f noise
FETs
Frequency
Gallium arsenide
Low-frequency noise
Microwave amplifiers
Microwave oscillators
Phase noise
Power amplifiers
Semiconductor device noise
Online Access:Request full text
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Description
Summary:This paper describes the analysis and design of a microwave feedforward power amplifier optimised for maximum close to carrier flicker noise suppression. Three amplifier topologies are analysed with respect to system noise figure and ease of production. Potential problems affecting error signal cancellation are highlighted and discussed. A feedforward 1 W power amplifier offering 20 dB flicker noise power reduction over 1-30 kHz offset from a 7.7 GHz carrier has been produced.
ISSN:1075-6787
DOI:10.1109/FREQ.2000.887411