An MMAC C-band FET feedback power amplifier

A feedback power amplifier using miniaturized microwave active circuit (MMAC) technology was developed for satellite C-band applications. This design demonstrates that a strong negative feedback can be implemented in the microwave frequencies to improve amplifier linearity and output power over a 75...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 1990-04, Vol.38 (4), p.350-357
Main Authors: Ezzeddine, A.K., Hung, H.-L.A., Huang, H.C.
Format: Article
Language:English
Subjects:
Active circuits
Amplifiers
Applied sciences
Bandwidth
Circuit properties
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Linearity
Microwave amplifiers
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwave frequencies
Microwave technology
Negative feedback
Power amplifiers
Power generation
Satellites
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Summary:A feedback power amplifier using miniaturized microwave active circuit (MMAC) technology was developed for satellite C-band applications. This design demonstrates that a strong negative feedback can be implemented in the microwave frequencies to improve amplifier linearity and output power over a 750 MHz bandwidth. The amplifier provides a third-order intermodulation distortion improvement of 7 to 9 dB across the band at backoff, compared to results obtained using the conventional approach without feedback. The theory, proof-of-concept experiment, design, and MMAC implementation of the feedback amplifier are presented.< >
ISSN:0018-9480
1557-9670
DOI:10.1109/22.52574