Wideband balun for wireless and RF application
US6140886A · kind A · utility
9Cited by
3References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1999 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Feb 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmission line balun transformer for providing a single ended output signal from a pair of differential input signals includes two transmission line signal couplers. The couplers are individually designed to be relatively loosely coupled devices, i.e. having a coupling factor greater than 3 dB, but are coupled together with proper phase relationships so as to achieve a relatively tighter composite coupling characteristic in the order of 3 dB, thereby resulting in an increase in bandwidth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.