Layered stripline filter including capacitive coupling electrodes
US5576672A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1995 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Jan 30, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/20381
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmission line filter having an improved attenuation characteristic is disclosed. The transmission line filter includes at least input-side and output-side resonators disposed in a dielectric layer which are inductively coupled with each other. Additionally, intermediate resonators may be disposed between the input-side and output-side resonators. Further, input and output electrodes are provided in another dielectric layer, at least one of which is in an opposed facing relationship to a portion of the input-side resonator and a portion of the output-side resonator, so as to overlap only those portions of the input-side and output-side resonators. Where intermediate resonators are disposed, at least one of the input and output electrodes is disposed in an opposed facing relationship to one of the input-side and output-side resonators and a respective adjacent intermediate resonator so as overlap only the above-noted input-side resonator or output-side resonator and respective adjacent intermediate resonator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.