Reconfigurable quadrature coupler

A method of operating a reconfigurable quadrature coupler comprising a coupler structure coupled to a first port, a second port, a third port, and a fourth port of the reconfigurable quadrature coupler, the method comprising:

• determining a first switchable impedance to provide a selectable second port reflection coefficient by operating a coupled port transformer of the reconfigurable quadrature coupler, wherein the coupled port transformer is coupled to the second port comprising a coupled port transmission line connected to a first transistor of the reconfigurable quadrature coupler;
• determining a second switchable impedance to provide a selectable third port reflection coefficient by operating an isolation port transformer of the reconfigurable quadrature coupler, wherein the isolation port transformer is coupled to the third port comprising an isolation port transmission line connected to a second transistor of the reconfigurable quadrature coupler;
• determining a fourth switchable impedance to provide a selectable fourth port reflection coefficient by operating a through port transformer of the reconfigurable quadrature coupler, wherein the through port transformer is coupled to the fourth port comprising a through port transmission line connected to a third transistor;
• switching on or off selected ones of the first, second, and third transistors by operating a controller of the reconfigurable quadrature coupler based on a selected mode of operation of the reconfigurable quadrature coupler.