Low-noise amplifier supporting beam-forming function and receiver including the same

A receiver for receiving a beam-forming signal via a plurality of antennas, the receiver including:

• a first amplifier circuit including a first transistor for amplifying an input signal to provide a first amplified signal, the input signal being derived from a portion of the beam-forming signal received by one of the antennas;
• a second amplifier circuit including a second transistor for amplifying the first amplified signal to generate a corresponding output signal;
• a variable capacitance circuit for selectively changing capacitance thereof to cause a corresponding phase change in the output signal and form a beam pointing in a selectable direction for receiving the beam-forming signal;
• and
• a gain fixing circuit including a third transistor for receiving the output signal, amplifying the output signal and outputting the amplified output signal.

A transceiver for supporting a beam-forming function, comprising:

• a receiver portion comprising:
• N receive signal paths respectively coupled to N antennas that collectively receive a beam-forming signal, each of the N receive signal paths including:
• a phase shift low-noise amplifier comprising:
• a first amplifier circuit comprising a first transistor for amplifying an input signal to provide a first amplified signal, the input signal being derived from a portion of the beam-forming signal received by a respective one of the N antennas;
• a second amplifier circuit comprising a second transistor for amplifying the first amplified signal to generate a corresponding output signal;
• and
• a variable capacitance circuit for selectively changing capacitance thereof to cause a corresponding phase change in the output signal;
• and
• a transmitter portion comprising N phase shift power amplifiers, each having substantially the same configuration as the phase shift low-noise amplifier.