Resonator for coupling intermediate frequency signals from a radio frequency mixer
US5790945A · kind A · utility
4Cited by
4References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1997 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Jan 9, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/009
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dumbbell shaped resonator efficiently couples IF signals from short transmission lines to an output transmission line at a radio frequency (RF) mixer's IF output port. The RF mixer uses short transmission lines and terminating resistors to match impedances within the mixer and to minimize the mixer's distortion. The RF mixer, including the dumbbell resonator, is constructed on a printed circuit board and has a low manufacturing cost. Alternatively, the output transmission line is center-tapped to provide a pair of IF signals having opposite phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.