Patent ID: 7167698

Claim:
A wide band mixer for mixing signals having different frequencies, the mixer comprising: a power splitter that receives a radio frequency (RF) input signal and generates a first intermediate RF signal and a second intermediate RF signal in phase with the RF input signal and having a power level about one-half the power level of the RF input signal; a phase splitter that receives a local oscillator (LO) input signal and generates a first intermediate LO signal and a second intermediate LO signal, the second intermediate signal is 180° out of phase with the first intermediate LO signal and the LO input signal; and a first anti-parallel diode pair that mixes the first intermediate RF signal with the first intermediate LO signal both first intermediate signals being received at a first end of the first anti-parallel diode pair and a second anti-parallel diode pair that mixes the second intermediate RF signal with the second intermediate LO signal both second intermediate signals being received at a first end of the second anti-parallel diode pair, the first and second anti-parallel diode pairs each having second ends as outputs coupled to a common node, the IF signal being provided at the common node.