Planar dual mode filters and a method of construction thereof
US5990765A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Nov 20, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/20381
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A planar dual mode filter has one or more resonators with L-shaped sections that are oriented back to back to one another. The filter can be constructed by adjusting the size of a gap between the back to back sections and adjusting the offset distance between adjacent sections. Further, coupling between adjacent resonators can be controlled by adjusting a distance between the adjacent resonators. The filters can be co-planar, stripline, suspended microstripline or microstripline. The filters have a film on a substrate with a ground plane. The film can be gold, silver or copper or it can be a ceramic material that becomes superconductive at cryogenic temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.