| 摘要 |
PURPOSE:To attain stabilization of tuning operation and remote control of a tuning frequency by providing a tuning section, an impedance element connected to the tuning section and a transmission line having length nearly equal to an odd number multiple of lambda/4 electric length of the tuning frequency and inserted and connected between the tuning section and the impedance element. CONSTITUTION:The reactance element is connected to the tuning section via the transmission line having length nearly equal to an odd number multiple of lambda/4 electric length in the tuning frequency. The impedance converting function is realized by the combination of the transmission line and the reactance element and the converted reactance having a property opposite to that of the reactance of the reactance element to be converted realized in this way is acted on the tuning section equivalently in parallel or series. For example, an impedance converter 18 comprising the connection of a capacitor 17 to be converted to the tuning section 15 via a coaxial cable 16 of lambda/4 electric length is connected and installed. |
