Opening Session, 1982 IEEE MTT-S International Microwave Symposium

V-band directional tandem coupler of monolithic uniplanar structure

“…(1), where P isol and P coup are the powers measured at an isolation port and a coupled port, respectively. The df is degraded with a decrease of coupling or an increase of mismatch between the even-and the odd-mode phase velocities [8].…”