A millimeter-wave wideband balanced amplifier using multilayer MMIC directional couplers

Abstract

This paper describes a millimeter-wave wideband balanced amplifier using novel multilayer MMIC directional couplers. The 3 dB-couplers designed for a center frequency of 50 GHz show coupling losses of 3.9 dB ± 0.3 dB. The balanced amplifier fabricated in a 1.2 mm × 2.3 mm areas, shows a gain of 10-14 dB with input and output return losses of better than 14… (More)

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