Double helical antenna
US10923826B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2018 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Jul 11, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A double helical coil antenna includes a low frequency helical coil configured to operate in axial mode emitting a beam of radio waves with circular polarization in a preselected direction, wherein one end of the low frequency helical coil terminating on a ground plate. It further includes a higher frequency helical coil configured to operate in axial mode emitting a beam of radio waves with circular polarization in a preselected direction, wherein the higher frequency helical coil concentrically mounted within the low frequency helical coil and with one end terminating onto the same ground plate, wherein the higher frequency helical coil selected to have opposite polarization to the low frequency coil. Preferably the antenna further includes a beam reflector cup mounted onto the ground plate having a cup bottom and a cup wall wherein the diameter is dimensioned to fit in between the low frequency helical coil and the higher frequency helical coil thereby increasing the gain of the higher frequency helical coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.