Patent ID: 8620254

Claim:
A wireless communications device comprising: an antenna configured to receive an RF signal from an ambient environment, the antenna being characterized by an antenna impedance, the RF signal being characterized by a predetermined frequency; a passive mixer assembly coupled to the antenna without an RF matching network, the passive mixer assembly being characterized by a passive mixer impedance presented to the antenna, the passive mixer assembly including a plurality of baseband mixer ports, the passive mixer assembly being configured to downconvert the RF signal and provide a plurality of baseband signals, each baseband signal of the plurality of baseband signals being directed out of a corresponding port of the plurality of baseband mixer ports and characterized by a predetermined phase of a plurality of predetermined phases; a baseband low noise amplifier (baseband-LNA) assembly coupled to the passive mixer assembly, the baseband-LNA assembly including an baseband-LNA input portion configured to receive the plurality of baseband signals from the passive mixer assembly, the baseband-LNA assembly being configured to provide a plurality of amplified baseband signals from an baseband-LNA output portion; and a baseband feedback network coupled between the baseband-LNA output portion and the baseband-LNA input portion, the baseband feedback network including a plurality of first adjustable resistive components, the plurality of first adjustable resistive components being selectively adjustable such that the passive mixer impedance is substantially matched to the antenna impedance at the predetermined RF frequency.