Stripline filter having internal ground electrodes
US5374909A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Feb 26, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/20345
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A compact stripline filter for use in a high frequency circuit for a portable telephone, for example, including an internal ground electrode. The filter includes a first resonator having a first main surface, a first ground electrode disposed in an opposed facing relationship to the entire surface of the first main surface of the first resonator, a first dielectric layer interposed between the first main surface of the first resonator and the first ground electrode, and a first internal ground electrode formed in the first dielectric layer and disposed in an opposed facing relationship to a portion of the first main surface of the first resonator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.