Lumped element transmission line frequency multiplexer
US6922117B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 2002 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Jun 26, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/703
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency multiplexer is disclosed. The frequency multiplexer comprises a lumped element transmission line comprising a plurality of inductances and capacitances, and a band pass filter coupled to a node of the lumped element transmission line, where the band pass filter includes a branch port that is coupled to the lumped element transmission line at a pass band of the band pass filter, and where the band pass filter exhibits a capacitive impedance in a stop band of the band pass filter. The band pass filter may comprise a series resonant circuit and a parallel resonant circuit, where the parallel resonant circuit is parallel resonant at nominally the same frequency at which the series resonant circuit is series resonant. An additional series resonant circuit may be coupled to the lumped element transmission line, where, at a resonant frequency of the additional series resonant circuit, the additional series resonant circuit is located at an electrical length of 90 degrees away from the series resonant circuit and the parallel resonant circuit on the lumped element transmission line, where the additional series resonant circuit exhibits a capacitive impedance at off-resonant fre…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.