Patent ID: 11874386
Assignee: COBHAM ADVANCED ELECTRONIC SOLUTIONS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for determining a polarization state of a radio frequency (RF) signal, the method comprising:
receiving, by a plurality of radio frequency (RF) antennas including a first RF antenna having a first polarization and a second RF antenna having a second polarization, an input RF signal having an input polarization, wherein the first and second polarizations are orthogonal to one another;
outputting by the first RF antenna a first antenna signal;
outputting by the second RF antenna a second antenna signal;
converting the first antenna signal to a first optical signal;
passing the first optical signal through a first optical channel to introduce a first delay;
converting the delayed first optical signal to a first RF signal;
determining an amplitude ratio and a phase difference between the first RF signal and a second RF signal associated with the second antenna signal; and
determining a polarization angle of the input RF signal received by the plurality of RF antennas based on the amplitude ratio and the phase difference.