Title :
Reduction of intermodulation distortion in microwave active bandpass filters-theory and experiments
Author :
Cheng, Kwok-Keung M. ; Chan, Siu-Chung
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong
fDate :
2/1/2000 12:00:00 AM
Abstract :
This paper examines, both theoretically and experimentally, the dependency of the third-order intermodulation (IM) distortion and power saturation upon circuit and device parameters of an active bandpass filter using negative-resistance compensation. Nonlinear analysis is performed by means of the Volterra series formulation. We show that the IM distortion can be reduced by several orders of magnitude with suitable choice of external gate-source and feedback capacitance values. Measured performances of some 900-MHz experimental MESFET bandpass filters are presented
Keywords :
MESFET integrated circuits; UHF filters; UHF integrated circuits; Volterra series; active filters; band-pass filters; circuit feedback; field effect MMIC; intermodulation distortion; microwave filters; negative resistance; nonlinear network analysis; 900 MHz; MESFET bandpass filters; Volterra series formulation; device parameters; external gate-source; feedback capacitance values; microwave active bandpass filters; negative-resistance compensation; nonlinear analysis; power saturation; third-order intermodulation distortion; Band pass filters; Capacitance; Circuits; Distortion measurement; Feedback; Intermodulation distortion; Microwave devices; Nonlinear distortion; Performance analysis; Performance evaluation;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
