A 5 GHz novel 0.18-/spl mu/m inductor-less CMOS sub-harmonic mixer

A novel CMOS low voltage inductor-less sub-harmonic mixer for 5 GHz industrial scientific medical (ISM) band direct conversion receiver in an 0.18-/spl mu/m SiGe Bi-CMOS process is presented. Simulated with 0.5% g/sub m/ mismatch, 0.5% load mismatch and 2/spl deg/ LO I/Q phase error the mixer is able to achieve high IIP/sub 2/ of 43.6 dBm, IIP/sub 3/ of 0 dBm, and voltage conversion gain of 8.05 dB while consuming less than 2.6 mA from a single 1.8 V supply.