Magnetically coupled series-tuned air coil resonators having very low C/L ratios to achieve higher QL, lower insertion loss and improved out-of-band rejection
US6538532B2 · kind B2 · utility
13Cited by
2References
4Claims
0Family size
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Key dates
| Filing date | Apr 10, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Apr 10, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/09
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A series tuned resonator circuit topology permits implementation of narrow band-pass filters having higher loaded quality factors (QL) and lower insertion loss than was previously achievable in the prior art employing such a topology. The topology employs an additional parallel capacitor for the series-tuned topology, with very low C/L ratios to achieve the combination of higher values of QL, low insertion loss and a steeper roll-off between the pass-band and the stop-band (at both lower and higher frequencies). Air coils are used to achieve the large inductor values desirable for the series-tuned topology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.