| 摘要 |
PURPOSE:To achieve excellent matching by equalizing the high impedance of an antenna side to the low input impedance of a receiving set side by providing an impedance converter, composed of a transformer, to the feeding path of an antenna. CONSTITUTION:An impedance converter 10 composed of a transformer 13 is provided at a halfway point of a feeder 7 made of a coaxial cable and then connected to a receiving set 9 via a feeder cable 7b. The primary coil of the transformer 13 has inductive reactance resonating in parallel to the capacitive reactance of an antenna side, and the secondary coil has impedance matching with the characteristic impedance of the cable 7b. Consequently, even when the receiving set 9 has low-input impedance, it is equalized accurately to achieve excellent matching. |
