4-Port Crossed-Junction Waveguide Circulators

Circulator action can be obtained with a symmetrical 4-port H-plane waveguide junction containing a central composite post of ferrite and a conducting material, e.g. brass, and this paper gives some details of the experimental investigation which has led to completed devices in three frequency ranges, 3 Gc/s, 9 Gc/s and 20 Gc/s.