Broadband reciprocal active balun structure
US7737786B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2008 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Dec 6, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/543
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention relates to the field of electronic devices known as baluns. It concerns an active balun which is broadband and reciprocal. Embodiments of the invention integrate an active splitter balun with an active combiner balun so as to form three transmission lines. A first active coupling is provided between the first and second transmission lines and a second active coupling is provided between the first and third transmission lines. The active couplings are provided by means of amplifier cells distributed along the transmission lines. Embodiments of the invention have configurable means for polarizing the different amplifier cells so as to create a specific coupling direction between the various transmission lines. The device according to the invention can be applied in the field of broadband mixers which are used, notably, in radio transmission and reception circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.