Abstract
For pt.I see ibid., vol.38, no.9, p.1210-17 (1990). Applications of line-unified FETs (LUFETs) to RF signal processing elements such as multiport combiner/dividers, mixers, balanced modulators, signal path switches, and circulators are proposed and demonstrated. A 2*1 combiner monolithic microwave integrated circuit (MMIC) using an in-phase combiner LUFET and an N*N combiner/divider based on the 2*1 combiner topology are presented. A single-end mixer and a balanced mixer implemented by combining divider and combiner LUFETs are presented, and a balanced mixer LUFET is proposed. A balanced modulator which is realized by slightly changing the phase inverter LUFET configuration is presented. This modulator is also a LUFET. A signal path switch with a configuration of symmetrically combined magic T LUFETs is presented. A circulator which is a combination of in-phase and out-of-phase divider and combiner LUFETs is presented. The areas of the fabricated LUFETs and LUFET MMICs are between 0.1 and 1.5 mm/sup 2/, the average being about 0.5 mm/sup 2/. >
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