| 摘要 |
<p>RADIO FREQUENCY TUNER A radio frequency tuner for ultra-high frequency ranges provided with an improved fine tuning device in which a conductor plate member is movably disposed in the vicinity of a resonant line having one end connected to a variable capacity element for tuning and its other end connected to earth directly or through a capacitor, so that the characteristic impedance of a distributed constant line is varied by driving the conductor plate member towards or away from the resonant line for fine adjustments of the tuned frequency.</p> |
