Abstract

Two novel passive balun structures for use in MMICs (microwave monolithic integrated circuits) are described. They are especially relevant to wideband push-pull power amplifiers, being capable of handling several watts of power. They operate over bandwidths of up to 3:1 and can provide large impedance level transformations. Exact network synthesis procedures are used to generate prototypes and a three-dimensional field simulator is used to verify the corresponding physical circuits. A family of designs for 6-18 GHz and 6.15-13.5 GHz bands has been established. >

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