Patent ID: 11894593
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A filter device provided between an input end and an output end and configured to attenuate a radio frequency signal in a specific frequency band, the filter device comprising:
a dielectric substrate having a multilayer structure;
a first ground electrode provided in the dielectric substrate;
a first coupling line provided in a layer different from a layer of the first ground electrode and electrically connected to the input end;
a second coupling line provided in a layer different from the layer of the first ground electrode and electrically connected to the output end; and
a stub connected to the first coupling line and the second coupling line,
wherein the first coupling line and the second coupling line are disposed in different layers of the dielectric substrate, and the first coupling line faces the second coupling line.