Odd order elliptic function narrow band-pass microwave filter
US4246555A · kind A · utility
26Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1978 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Jul 19, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/208
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Multiple coupled high Q cavities are used to generate odd order elliptic function band-pass filters using a minimum number of cavities connected by simple and resonant coupling elements. A specific embodiment of a 3-pole, 20 MHz band-pass wave guide cavity filter centered at 3890 MHz is disclosed. Couplings between cavities may be either on the end walls or the side walls. The simple coupling elements may be simple coupling holes, and the resonant coupling elements may be a non-shorting screw in a window between cavities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.