Microstrip filter including resonators having ends at different coupling distances
US7742793B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Mar 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/20336
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus to provide appropriate coupling between resonators in an HTS microstrip filter are disclosed. Primary and secondary couplings between a pair of resonators are utilized. With a given spacing, the primary coupling is fixed, while the secondary coupling can have different magnitude. In addition, the secondary coupling can have the same phase or opposite phase as the primary coupling. With different combinations, large or small bandwidth filters can be made without very small or very large spacing between resonators. The same cross coupling layout configuration may be designed to achieve either positive or negative results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.