Ceramic filter with recessed shield
US5959511A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1998 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Apr 2, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2056
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A ceramic filter with recessed shield 200 is provided. Filter 200 contains a filter body with a block of dielectric material having a top surface 202, a bottom surface 204, and side surfaces 206, 208, 210 and 212 respectively. Filter 200 also has a plurality of metallized through-holes 214 extending from the top surface 202 to the bottom surface 204 defining resonators. Each of the resonators has a corresponding plurality of embedded receptacles 220, which contain an unmetallized area therein, adjacent to the plurality of metallized through-holes 214, providing a ring of isolation 222. A recessed channel 224 extends perpendicularly across each of the plurality of embedded receptacles 220 and has a groove 226 therein which is complementarily configured to receive a metallic shield 228. The metallic shield 228 is disposed in the recessed channel 224 and is connected to the metallization layer of the plurality of embedded receptacles 220. The metallic shield 228 is attached to the dielectric block with a design that reduces the size and volume of the filter 200.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.