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    • 18. 发明授权
    • Voltage-controlled variable-passband filter and high-frequency circuit
module incorporating same
    • 压控可变带通滤波器和并入其的高频电路模块
    • US6018282A
    • 2000-01-25
    • US965229
    • 1997-11-06
    • Yoichi Tsuda
    • Yoichi Tsuda
    • H01G5/40H01G7/06H01P1/203H01P1/205H03H7/12H04B1/3822H04B1/40
    • H01P1/20345
    • The voltage-controlled variable-passband filter in accordance with the present invention is structured so that conductive patterns, R, L, and C, and other circuit elements are embedded in a ceramic substrate. Within this substrate is also embedded an insulating layer made of the same ceramic material, the capacitance of which changes in response to an electric field applied thereto. On one surface of the insulating layer is provided a control electrode, and on the other surface are provided adjacent to one another a resonator pattern, to which high-frequency signals are applied, and a ground pattern. Accordingly, two capacitors connected in series are formed between the resonator pattern and the ground pattern, and the capacitance of these series capacitors can be adjusted by an integrated circuit mounted on the ceramic substrate, thus reducing size and weight, and simplifying adjustment.
    • 根据本发明的压控可变带通滤波器被构造成使得导电图案R,L和C以及其它电路元件嵌入在陶瓷衬底中。 在该衬底内还嵌有由相同陶瓷材料制成的绝缘层,其电容随施加于其上的电场而变化。 在绝缘层的一个表面上设置有控制电极,另一个表面彼此相邻地设置有施加高频信号的谐振器图案和接地图案。 因此,在谐振器图案和接地图案之间形成串联连接的两个电容器,并且可以通过安装在陶瓷基板上的集成电路来调整这些串联电容器的电容,从而减小尺寸和重量,并且简化调整。