Resonator filter with improved adjacent channel selectivity
US6894588B2 · kind B2 · utility
20Cited by
5References
27Claims
0Family size
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Inventor
Key dates
| Filing date | Feb 14, 2003 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Mar 18, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/643
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
For improving the adjacent channel selectivity of a resonator filter, reflectors of resonators are differently designed so that the minimums of the reflection functions of different reflectors of a resonator are shifted relative to one another and preferably compensate with the corresponding maximum of the respectively other reflection function. This reduces noise spikes at the low-frequency side of the pass-band of corresponding resonator filters and, thus, improves the adjacent channel selectivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.