Patent ID: 9293812
Filing Date: 2016-03-22
CPC Classification: G01S,H01Q

Claim Text:
1. A radar antenna assembly suitable to be located behind a window of a vehicle to detect an object through the window and in an area about the vehicle, said assembly comprising: a microstrip patch configured to emit a radar signal through the window and into the area, wherein the radar signal is characterized by a transmitted polarization of the radar signal, wherein the transmitted polarization is influenced by a first transmit signal received at a first port of the microstrip patch and a second transmit signal received at a second port of the microstrip patch; a hybrid coupler configured to orthogonally combine a first input signal and a second input signal to output the first transmit signal and the second transmit signal, wherein the first transmit signal is based on a relative combination of the first input signal with a negatively phase shifted second input signal, and the second transmit signal is based on a relative combination of the second input signal with a negatively phase shifted first input signal; a phase shifter operable to vary the phase of the second input signal relative to the first input signal in accordance with a control signal; and a power divider configured to divide a source signal such that an amplitude of the first input signal, is substantially equal to an amplitude of the second input signal.