主权项 |
1. A quadrature hybrid comprising a first and a second open waveguide which are electrically coupled to each other, with each of said open waveguides comprising a first and a second port, where one of the ports in the first open waveguide is arranged to be used as an input port for an input signal which the quadrature hybrid is arranged to use to generate I and Q output signals, with the other port in the first open waveguide being arranged to be used to output said Q signal, and one of the ports in the second waveguide is arranged to be used to output said I signal with the other of the ports in the second open waveguide being arranged to be an isolated port, the quadrature hybrid additionally comprising a first differential amplifier with a positive and a negative port, with the positive port being connected to the first open waveguide and the negative port being connected to the second open waveguide. |