| 摘要 |
Each helical coil (1, 2, 8) has a housing (5), surrounding the coil. A lug-shaped movable body (4, 18) is provided for each coil above it either closely adjacent or separately. The movable bodies of the coils have a movable metal body (18) and a movable dielectric body (4). The metal body is fitted opposite to a plate-shaped metal body (13) under the respective coil. Pref. the metal body is fitted to a coil (8), not forming the input coil (1) nor the output coil (20). There may be three coils, an input and an ouput one in an outside configuration, to which the dielectric body is associated. USE/ADVANTAGE - for attenuation of a signal, increased by a higher harmonic of the resonance frequency, with reduced faulty response, with improved operation. |
