Patent ID: 7324796

Claim:
A mixer comprising: a) a first and second coupled line, the first coupled line connected to a local oscillator port for receiving a local oscillator signal; b) a third and fourth coupled line, the third coupled line having one end connected to the first coupled line and the other end connected to ground; c) a fifth and sixth coupled line, the sixth coupled line having one end connected to the second coupled line and the other end connected to ground; d) a seventh inductor line having one end connected to ground and the other end connected to a first node, one end of the fourth and fifth coupled lines connected to the first node; e) a first capacitor connected between the first node and ground; f) four diodes connected together, the cathode of one diode connected to the anode of another diode; g) the other end of the fourth and fifth coupled lines connected to the diodes; h) an eighth inductor line having one end connected to the diodes and another end connected to an intermediate frequency port; i) a second capacitor connected between the eighth line and a radio frequency port; and j) a third capacitor connected between the intermediate frequency port and ground.