Enhanced antenna systems
US11005188B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2017 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Dec 25, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Antenna systems are described which provide means of mitigating the undesirable transmission line effect(s) by using fractal metamaterials in close proximity to an antenna, with both the antenna and fractal metamaterials being positioned a conductive surface, which may be inside or adjacent to a cavity. The fractal metamaterial can include an array of close spaced (e.g., less than 1/10 wavelength separation) resonant structures of a fractal shape, resonant at or near the intended frequency of use of the antenna. The fractal metamaterial can reverse the phase of the reflected wave so that the metal cavity no longer produces an out of phase current induced by the antenna. Without the cavity being out of phase to the antenna, the transmission line effect is mitigated substantially and the antenna performance can accordingly be enhanced. Further embodiments omit a cavity and locate a fractal metamaterial and antenna(s) adjacent to an underlying conductive surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.