15 GHz wideband CMOS Gilbert up-converter with stacked spiral-CPS phase-inverter rat-race coupler at RF port


A miniaturized phase-inverter rat-race and its wideband Gilbert up-converter is demonstrated in 0.13-μm CMOS technology. The common-mode LO leakage can be absorbed by the isolated port of the rat-race coupler while the rate-race employed at RF port to combine the mixer differential output. A phase-inverter rat-race coupler with a stacked spiral-shape… (More)


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