| 摘要 |
PURPOSE: A variable resonator and variable filter are provided to inexpensively produce a variable resonator and a variable filter using a parallel resonance circuit. CONSTITUTION: A railroad track unit(1) is formed on a dielectric substrate and is conductive. At least two parallel resonance circuits(4) resonate in parallel at a desired frequency. At least three variable reactance devices(2) are able to be set by the same reactance value respectively. The variable reactance devices are connected to a ring-shaped track. A variable filter comprises a variable resonator and a transmission track(5). |
