Patent ID: 8180310

Claim:
A device including: a receiver having a low noise amplifier (LNA), the LNA comprising: an amplifier configured to operate in an RF domain, to receive an overall signal containing a component at a reception frequency and a component at a transmission frequency, to amplify the component at the reception frequency, and to output the amplified component at the reception frequency; a first load connected to the amplifier; a first mixer; a second reactive load connected to the first mixer, the first mixer and the second reactive load connected in parallel with the first load, the second reactive load having a reactance which when translated to an impedance by the first mixer either shorts the component at the reception frequency or presents an open circuit to the component at the transmission frequency; and a second mixer connected to the output of the amplifier and being configured to mix the amplified component and to output a resulting signal at a base band frequency; a switch, the switch being configured to isolate the first mixer from the RF amplifier when a magnitude of the component at the transmission frequency is below a selected value; and an antenna in communication with the receiver.