Quadrature hybrid coupler network comprising three identical tandem fifteen cascaded section couplers

Claim 1

In a 0.7 to 11.0 GHz quadrature hybrid coupler network system comprising: a. three dielectric layers sandwiched between two metal ground plane backup plates, b. a first set of interconnected successive conductors in the form of flat stripline occupying a first plane and positioned on one side of the center dielectric layer of said three dielectric layers, c. a second set of interconnected successive conductors in the form of flat stripline occupying a second plane and positioned on the other side of said center dielectric layer, d. said first and second sets being shaped and positioned with respect to each other as to form three identical tandem 15 cascaded section couplers with a transition ratio of less than 2:1 from one cascade section to the next, the input or isolated port of the first coupler being the input terminal of the system and the straight-through and coupled ports of the third coupler being the output terminals of the system.