Patent ID: 8472887

Claim:
A radio frequency integrated circuit for enhancing wireless communication and/or sensing systems comprising: a base comprising a gallium arsenide (GaAs) substrate; the base length and width being in the range of approximately 3-4 mm; binary phase shift keying modulator fabricated on the base; a power amplifier fabricated on the base and operatively associated with the binary phase shift keying modulator; the power amplifier having a first shunt operatively associated therewith; the first shunt comprising a gate-enabled circuit; a transmit/receive switch fabricated on the base comprising high electron mobility transistor switches and a plurality of isolation capacitors, the transmit/receive switch being operatively associated with the power amplifier and being alternately connectable to an antenna port adapted to be connected to an antenna; a low noise amplifier fabricated on the base; the low noise amplifier being alternately connectable to the antenna port, the low noise amplifier having a second shunt operatively associated therewith; the second shunt comprising a gate-enabled circuit for increased isolation; the low noise amplifier being operatively connected to a current mirror comprising a high electron mobility transistor to set the gate bias voltage based upon the current in the low noise amplifier, the current mirror providing stable current consumption even at low, declining voltages allowing the low noise amplifier to operate at a voltage as low as two volts; the circuit operating in a transmit stage in which the power amplifier is connected to the antenna port and in a receive stage in which the low noise amplifier is connected to the antenna port; whereby in the receive stage the power amplifier is bypassed by the first shunt to reduce current consumption and substantially isolate the receive stage from the transmit stage; and in the transmit stage the low noise amplifier is bypassed by the second shunt to reduce current consumption and to substantially isolate the transmit stage from the receive stage.