ADAPTIVE TRANSMIT ARRAY FOR BEAM-STEERING

摘要

A method includes receiving a remote transmitter signal at an antenna array including a number of antenna elements, mixing the received signal with in-phase and quadrature-phase Local Oscillator (LO) signals from Voltage Controlled Oscillators (VCOs) of a coupled VCO array, and configuring each Phase Locked Loop (PLL) of a number of PLLs to receive an in-phase output of the mixing corresponding to a VCO and a quadrature-phase output of the mixing corresponding to another VCO adjacent to the VCO as inputs thereto. The method also includes feeding back an output of the each PLL to the VCO, driving the in-phase and the quadrature-phase outputs of the mixing from a transmit modulator, and transmitting, in a direction of the remote transmitter, an antenna array signal based on the driving. Further, the method includes sensing a servoed state related to LO phase relationships and holding thereof during the transmission of the signal.

主权项

1. A method comprising:
receiving a signal from a remote transmitter at an antenna array comprising a plurality of antenna elements; mixing the received signal with in-phase and quadrature-phase Local Oscillator (LO) signals from Voltage Controlled Oscillators (VCOs) of a coupled VCO array; configuring each Phase Locked Loop (PLL) of a plurality of PLLs to receive an in-phase output of the mixing corresponding to a VCO of the coupled VCO array and a quadrature-phase output of the mixing corresponding to another VCO adjacent to the VCO in the coupled VCO array as inputs thereto; feeding back an output of the each PLL to the VCO of the coupled VCO array; driving the in-phase and the quadrature-phase outputs of the mixing from in-phase and quadrature-phase outputs of a transmit modulator instead of the each PLL being driven by the in-phase and the quadrature-phase output of the mixing; transmitting, in a direction of the remote transmitter, a signal from the antenna array based on the driving of the in-phase and the quadrature-phase outputs of the mixing from the transmit modulator; and sensing a servoed state related to phase relationships between the LO signals and holding the servoed state through a sample and hold circuit coupled in a feedback path between the output of the each PLL and the VCO during the transmission of the signal in the direction of the remote transmitter.