Filter device and method for manufacturing the same
US7911297B2 · kind B2 · utility
0Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2007 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Jan 17, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49016
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A filter device having a frame made of plated steel sheet generates a smaller insertion loss and is excellent in productivity. Resonant elements are shaped into a cylindrical form by bending the steel sheet, whose both sides are plated, before they are placed in a filter housing. A gap formed on a lateral face of each resonant element is brazed with solder, and an outer plated face of each resonant element is brazed with solder to an inner plated face of the frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.