Passive MESFET Limiters For Wireless Applications

Passive MESFET Limiters For Wireless Applications

The ability to sharply limit power level while maintaining a negligible change in phase is important in many wireless communications systems. This paper investigates the use of a passive MESFET device as a power limiter for the UHF and lower microwave frequency range. The S-parameters of a commercia...

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Bibliographic Details
Published in:IEEE Princeton Section Sarnoff Symposium pp. 0_53 - 0_56
Main Authors: Buchinsky, C.E., Katz, A.
Format: Conference Proceeding
Language:English
Published: IEEE 1995
Subjects:
Circuit testing
Educational institutions
FETs
Gallium arsenide
MESFETs
Nonlinear distortion
Power measurement
Power system modeling
Production
Wireless communication
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Summary:The ability to sharply limit power level while maintaining a negligible change in phase is important in many wireless communications systems. This paper investigates the use of a passive MESFET device as a power limiter for the UHF and lower microwave frequency range. The S-parameters of a commercial grade GaAs FET were measured as a function of power level and used to develop a model. From the model a limiter circuit was designed, fabricated and tested. The resulting limiter employed two FETs in cascade, and produced a near ideal transfer characteristic over more than a two decade power range with less than a 15 degree change in phase.
DOI:10.1109/SARNOF.1995.636702