Filter device and radio-frequency front-end circuit including the same
US12278609B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 2023 |
| Grant date | Apr 15, 2025 |
| Priority date | — |
| Expiry date | Oct 6, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2001/0085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A filter device includes a body, a ground terminal, and resonators in the body and coupled to each other by electromagnetic field coupling. The resonators include a first resonator coupled to an input terminal, a second resonator coupled to an output terminal, and third and fourth resonators. The second resonator is adjacent to the first resonator in a first direction. The third resonator is adjacent to the first resonator in a second direction perpendicular to the first direction. The fourth resonator is adjacent to the third resonator in the first direction. The third and fourth resonators partially share a path to the ground terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.