On the design of active GaAs multipliers

This paper is concerned with the design of high performance analogue multipliers using GaAs MESFET technology which use compact entirely active circuits and avoid the need for off-chip transformers or large on-chip baluns using coupled structures. A study by theory and simulation is made of various interface stages which drive the push-pull output FETs and some complete multipliers using various input signal splitters are compared. The need is identified for an improved signal splitter which can be realised in compact MMIC form.