Patent ID: 7369834

Claim:
An impedance-matched IQ network configured to provide substantially a ±90 degree phase shift to a received quadrature phase signal relative to a received an in-phase signal, and to provide a summation of the ±90 degree phase-shifted quadrature phase signal and the received in-phase signal, the impedance matched IQ network comprising: a phase shift circuit having an in-phase mixer port configured to receive the in-phase signal, a quadrature-phase mixer port configured to receive the quadrature-phase signal, a termination port, and an output port, the phase shift circuit configured to provide substantially a ±90 degree phase shift between the in-phase mixer and quadrature-phase mixer ports; and a back termination coupled to the termination port of the phase shift circuit, the back termination having an impedance value substantially equal to the characteristic impedance of the phase shift circuit at the termination port, wherein said termination port of the phase shift circuit couples to either the in-phase mixer port or the quadrature-phase mixer port of the phase shift circuit, wherein the in-phase or quadrature-phase mixer port to which the termination port is coupled comprises either: (i) a single-ended signal port, or (ii) one of two ports that collectively form a differential signal line.