A harmonic rejection mixer robust to RF device mismatches

This paper presents a new HR mixer that has significantly reduced sensitivity to mismatches in devices operating at high frequencies. HRR for this mixer is primarily determined by resistor and capacitor matching in the low frequency IF section. Significantly improved HRR is achieved as using large resistor areas for better matching does not cause a power or bandwidth penalty in the IF section. Additionally, this active mixer rejects flicker noise and improves second-order intermodulation (IIP2) and image rejection (IR) performance.