An antenna correlation measuring receiver

The paper presents a simple antenna correlation measuring receiver that is capable of measuring the complex cross-correlation of the signals produced by two receiving antennas connected to it. To measure complex correlation, information about the amplitude and phase of each signal is required. Synchronous phase measurement dictates that highly phase-stable oscillators and signal generators are used in both the transmitter and the receiver. The design presented however, employs common first and second oscillators in a two-branch measuring receiver. This method removes the necessity for expensive signal generators, as phase fluctuations (produced by either the transmitter or the shared receiver oscillators) are common to both branches and do not effect the complex correlation calculated between them