Dual-band bandpass filter with stepped-impedance resonators
US7102470B2 · kind B2 · utility
5Cited by
5References
21Claims
0Family size
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Key dates
| Filing date | Nov 2, 2004 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Nov 2, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/20381
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dual-band bandpass filter with stepped-impedance resonators uses only one circuit to generate dual-band effect. It adopts the principle of stepped-impedance resonator, which contains a connecting section and two coupling sections. The impedance and electrical length of the connecting section and coupling sections conforms to a selected condition to generate two passbands at desired frequencies. A multi-layer broadside-coupled parallel lines structure may be applied to increase coupling-amount between the parallel lines so that the dual-band bandpass filters have broader bandwidth and less loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.