A 3.1–10.6 GHz CMOS mixer with a 1.6 GHz IF bandwidth for frequency hopping OFDM applications

A 3.1-10.6 GHz mixer for frequency hopping OFDM applications is presented. With band stop filter loads, the mixer, designed in a 0.13 μm CMOS process, achieved a 1.6 GHz IF bandwidth and a 12 dB conversion gain in the first band group. The conversion gain variation in each IF bandwidth is less than ±1.5 dB. The noise figure is 8-13 dB and input return loss is better than -10 dB in the entire RF frequency.