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US 2008/0269062 A1Published application
Bandpass filter and forming method of the same
AssigneeFujitsu Limited
InventorsMasatoshi ISHII, Kazunori YAMANAKA, John D. BANIECKI, Akihiko AKASEGAWA
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Abstract
A bandpass filter capable of creating a dual mode with a simple configuration and stably adjusting the filter characteristics of the bandpass filter is disclosed. The bandpass filter includes a dielectric base substrate; a disk resonator formed over the dielectric base substrate; and a dielectric block disposed over a part of the dielectric base substrate and in substantially the same plane as the disk resonator.
Claims10
A bandpass filter comprising:
- a dielectric base substrate;
- a disk resonator formed over the dielectric base substrate;
- and
- a dielectric block disposed over a part of the dielectric base substrate and in substantially the same plane as the disk resonator.
1 more element
A method of forming a bandpass filter comprising:
- forming an disk resonator and input and output signal lines over a dielectric base substrate, the input and the output signal lines extending at substantially 90 degrees from each other with respect to the disk resonator;
- and
- disposing a dielectric block at a position other than a position that is opposite to the input port and the output port with respect to a center of the disk resonator and that is on an extended line passing though the center of the disk resonator and the input port or on an extended line passing though the center of the disk resonator and the output port, the dielectric block having a size to cover a part of the dielectric base substrate.
Dependencies are inferred from the claim text.