| 摘要 |
The invention discloses a microwave circuit (500) comprising a quadrature circuit (300) with first (1 ) and second (2) inputs, and first (3) and second outputs (4), the quadrature circuit (300) being designed to give a desired phase difference and amplitude ratio between the output signals of said output ports (3, 4) when a first input signal is applied to the first input port (1 ). The second input port (2) of the quadrature circuit (300) is connected to impedance (120, 220), and said impedance (120, 220) is chosen so that said desired phase difference between the output signals (3, 4) is obtained and maintained, and also so that said amplitude ratio between the amplitudes of the output signals is obtained and maintained. Suitably, the phase difference is ninety degrees and the amplitude ratio is equality of the amplitudes |
