A Duplexing Ferrite Adjustable-Phase Power Divider

A rotatable ferrite nonreciprocal quarter-wave plate is coupled at each end to the square waveguide ports of two septum polarizers. The four-port junction that is created has the properties that: (a) transmit and receive signals appear at different ports of the input septum polarizer; (b) equal-amplitude power division of the transmit signal is performed with arbitrary phase difference between the two output ports; and (c) equal-amplitude signals entering the output ports with the same phase difference will be summed and coupled to the receive port of the input septum polarizer. Measured data are presented for an experimental structure