Filter circuit
US7167065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2004 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Jun 30, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2053
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A filter circuit has a complex block and exciting portions. The complex block has: a first block end resonator; a first resonator that is coupled to the first block end resonator; a second resonator that is coupled to the first resonator; a third resonator that is coupled to the second resonator; a fourth resonator that is coupled to the third resonator; and a second block end resonator that is coupled to the fourth resonator. Couplings between the first block end resonator and the second block end resonator, between the first resonator and the fourth resonator, and between the second resonator and the third resonator are in phase. The complex block and the exciting portions are single-path-coupled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.