| 摘要 |
PURPOSE:To decrease the cost of a UHF tuner by providing two gaps through a connecting portion at the leg of a long U-shaped plate, and attaching plate shaped electrodes at the ends of the second, third, and fourth legs which are separated by one gap. CONSTITUTION:One end of a coupling coil 18 is connected to the same ends of resonating coils 16 and 17. Metal plate is punched through and one body is formed. The adjustment of the inductance is performed by bending down the resonating coil 17 and varying the distance between the resonating coil 17 and the resonating coil 16. Since the coupling coil 18 is primarily coupled with the resonating coil 16, and therefore has few effects of the resonating coil 17, the variation in coupling is small. Since the adjustment of the inductance and the adjustment of the coupling can be performed independently, the adjustments can be performed easily. Furthermore, since one body is formed by the punching process, the dispersion of positional relations are small, the adjustment of the coupling may not be required, the number of the parts of the UHF tuner is decreased, and the cost is decreased. |
