Design of millimetre-wave monolithic balanced diode mixer

Author

Wilson, P.G. ; Palmer, J.H.

Author_Institution

British Telecom Res. Labs., Ipswich, UK

fYear

1988

fDate

32224

Firstpage

42552

Lastpage

42555

Abstract

The authors describe the process used to design a 28 GHz single-balanced mixer. The procedure consists of two steps, diode modelling, and analysis. The design of diode mixers for minimum conversion loss and noise figure requires knowledge of the diode impedance when pumped by a local oscillator (LO), so that the optimum matching circuit can be designed. This impedance is difficult to measure, particularly at millimetre-wave frequencies, and so the alternative is to simulate the diode operation in the time domain, using a nonlinear equivalent circuit model for the diode. The impedances at the various mixing frequencies are then obtained by analysing the voltage and current waveforms in the circuit predicted by a nonlinear analysis program. The harmonic balance method is preferred and analysis software adopting this approach is discussed

Keywords

circuit CAD; circuit analysis computing; equivalent circuits; mixers (circuits); nonlinear network analysis; nonlinear network synthesis; solid-state microwave circuits; 28 GHz; CAD; MM-wave type; MMIC; SHF; diode impedance; diode modelling; harmonic balance method; microwave circuits; millimetre-wave; minimum conversion loss; minimum noise figure; monolithic balanced diode mixer; nonlinear analysis program; nonlinear equivalent circuit model; optimum matching circuit; single-balanced mixer; time domain simulation;

fLanguage

English

Publisher

iet

Conference_Titel

Microwave Devices, Fundamentals and Applications, IEE Colloquium on

Conference_Location

London

Type

conf

Filename

208990