| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a tunable filter device that can adjust the center frequency of a passband stably in a wide range, while suppressing disturbance of a waveform in filter characteristics.SOLUTION: A tunable filter device according to an embodiment includes a dielectric substrate, a resonator pattern, a characteristic adjustment member, and a drive mechanism. The dielectric substrate has a surface that has been virtually divided into a first area and a second area. The resonator pattern is formed of conductive material in the first area of the surface. The characteristic adjustment member has an opposing surface arranged opposite to the surface and formed of a dielectric substance or a magnetic substance or conductive material. The drive mechanism drives the characteristic adjustment member, so as to define the volume of a space held between the opposing surface and a projection surface obtained by projecting the characteristic adjustment member on the surface, as the spatial volume, and adjust a spatial volume ratio between the spatial volume of the first area and the spatial volume of the second area.</p> |
