Device comprising a passive, 180 degree phase-shifting coupling circuit

摘要

The device includes a passive coupler circuit with localised elements which couple a first alternating signal of given central frequency (f-0) present on a first primary port (P1) with two second alternating signals, phase shifted by 180 degrees, present on two secondary ports (P3,P4). First and second elementary dephaser circuits (B,B') are also included, with each having a differential input pole (1,1') and a summing input pole (2,2'), and first and second output poles (3,4,3'4'). The elementary circuits are connected together so the differential input pole of the first circuit provides the first primary port (P1). The differential input pole of the second circuit provides a second primary port (P'1) connected to earth by an impedance (Zo). The output poles of the first and second circuits are coupled respectively in cross formation and provide the secondary output ports. The summing input poles are short-circuited.