Dual-mode filters using dielectric resonators with apertures
US5200721A · kind A · utility
28Cited by
5References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Nov 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2086
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dual-mode filter has a dielectric resonator in each cavity, with each resonator containing one or more apertures. The aperture or apertures are located to shift a resonance frequency of a spurious mode to a higher frequency range distance from a principal mode. The principal mode can be an HEH.sub.11 mode and the spurious mode can be an HEE.sub.11 mode or vice-versa. The dielectric resonators can be a solid block or two or more discs that are laminated to one another. Previous dual-mode filters cannot attain the results required for current satellite systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.