Miniature 180 degree hybrid coupler
US7746193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2008 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Feb 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A 180° hybrid coupler (100) includes a first transmission line transformer (101) and a second transmission line transformer (102). Each of the first and second transmission line transformers is comprised of a coplanar stripline structure disposed in a spiral configuration. Each of the coplanar stripline structures has a first characteristic impedance and is configured to function as a balun. A common input feed (202) is coupled to each of the first and second transmission line transformers. A third transmission line transformer (103) and a fourth transmission line transformer (104) are also provided. Each of the third and fourth transmission line transformers is also configured to function as a balun and is coupled to the first and second transmission line transformers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.