Title :
Design technique for MESFET mixers for maximum conversion gain
Author :
Joao, R.M. ; Costa, F.J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Inst. Superior Tecnico, Lisboa
fDate :
12/1/1990 12:00:00 AM
Abstract :
A design technique for MESFET mixers is described. This technique is based on a mixer analysis program (MIXAN) designed to obtain the value of conversion gain and evaluate the influence of the embedding impedances for any local oscillator power and DC bias, in order to optimized the mixer performance. The MIXAN program, which uses SPICE as a subroutine to determine large-signal current and voltage waveforms, is able to obtain the operating conditions for maximum conversion gain. The good agreement between experimental and simulation results for X-band drain and gate mixers proves the validity of the design technique
Keywords :
Schottky gate field effect transistors; circuit CAD; circuit analysis computing; mixers (circuits); nonlinear network analysis; solid-state microwave circuits; DC bias; MESFET mixers; MIXAN; SPICE subroutine; X-band; design technique; embedding impedances; large signal voltage waveforms; large-signal current; local oscillator power; maximum conversion gain; mixer analysis program; operating conditions; Circuits; Design optimization; Impedance; Local oscillators; MESFETs; Mixers; Performance gain; Radio frequency; SPICE; Topology;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
