Patent ID: 7092677
Filing Date: 2006-08-15
Classification: H01P,H04B

Abstract:
1. A SPDT switch comprising: an antenna port; a transmitter section that is coupled to a transmitter port, said transmitter section including a plurality of first transistors that are coupled in series relative to each other wherein the drain of each successive first transistor is connected to the source of an adjacent transistor; and a receiver section that is coupled to a receiver port, said receiver section including a plurality of second transistors that are coupled in series relative to each other wherein the drain of each successive second transistor is connected to the source of an adjacent transistor, so that when said transmitter section transmits high power to said antenna port, the receiver section is effectively off to provide isolation to said receive port; wherein said receiver port is coupled to said receiver section using at least one first external capacitor, said at least one first external capacitor being used to improve the power handling capability and harmonic performance of the switch; said transmitter port is coupled to said transmitter section using at least one second external capacitor, said second external capacitor being used to improve the power handling capability and harmonic performance of the switch.