Patent ID: 6262690
Filing Date: 2001-07-17
Classification: H01Q,H04B

Abstract:
An antenna polarization control circuit, the antenna polarization control circuit receiving a transmission signal, comprising:a polarization switch for receiving the transmission signal, the polarization switch generating a first and second output signal, each first and second output signal being substantially similar to the transmission signal, the polarization switch having a first switch output and a second switch output, where the polarization switch selects whether to apply the transmission signal to the first switch output or the second switch output;a coupler, the coupler having first and second inputs respectively connected to the first and second switch outputs, the coupler having first and second coupler outputs, the coupler generating a first output signal for output on the first coupler output and a second output signal for output on the second coupler output, wherein the first and second output signals have a predetermined phase difference;a variable detector for detecting and adjusting relative amplitude and phase of the first and second output signals; andan error correction circuit for determining an adjustment to the variable detector to vary phase and amplitude of the first and second output signals in accordance with the relative amplitude and phase of the first and second output signals.