Wideband balun using re-entrant coupled lines and ferrite material
US8638181B2 · kind B2 · utility
1Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2011 |
| Grant date | Jan 28, 2014 |
| Priority date | — |
| Expiry date | Jul 26, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49155
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A Guanella type balun with a conductive enclosure (for example, a re-entrant box) between its coupled lines and the magnetic material enclosing its coupled lines. Some embodiments use coupled strip lines. Some embodiments have dielectric material, such as printed circuit board material inside the re-entrant box along with the coupled strip lines. Preferably, the magnetic material is ferrimagnetic. Some preferred magnetic materials are non-conductive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.