Tapered direct fed bifilar helix antenna
US8525751B1 · kind B1 · utility
4Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 29, 2011 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Apr 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q11/083
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A tapered direct fed bifilar helix antenna comprises bifilar antenna elements which helically spiral around an antenna axis to define an outer cylindrical shape of the direct fed bifilar helix antenna. The width of the bifilar antenna elements at the feed end of the antenna is sized to provide the antenna with an approximately fifty ohm characteristic impedance. The individual filar elements taper at a predetermined axial position from a maximum width at the feed end to a minimum width at the end furthest from the feed end. A fifty ohm coaxial cable directly feeds the tapered bifilar antenna elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.