| 摘要 |
The present invention relates to a balun circuit that includes means for transforming a balanced input signal to an unbalanced signal and impedance changing means. The means for transforming the balun input signal to an unbalanced output signal is a lambd/2-waveguide (30). A first side of the lambd/2-waveguide (30) is connected to a second port (P2) of the balun circuit, while a second side of said lambd/2-waveguide (30) is connected to a third port (P3) of the balun circuit. The impedance changing means is a lambd/4-waveguide (40) of which a first side is connected to a second side of the lambd/2-waveguide (30) and a second side is connected to the first port (P1) of the balun circuit. |
