Antenna feed for a stackable antenna, and associated methods
US11588251B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2021 |
| Grant date | Feb 21, 2023 |
| Priority date | — |
| Expiry date | Jun 18, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna feed for a stackable antenna system includes a polarization converter that continuously surrounds an omnidirectional antenna. Electromagnetic radiation emitted by the omnidirectional antenna and having an initial polarization passes through the first polarization converter, which converts the initial polarization into a non-vertical linear polarization. A feedline located outside of the first polarization converter forms a helix that wraps around the first polarization converter such that it runs perpendicularly to the non-vertical linear polarization. When the width of the feedline is sufficiently small, electrons in metal of the feedline will not be excited by the radiation, and the radiation will transmit through the feedline with minimal impact on the omnidirectional antenna's gain profile. The feedline may be used to feed a second antenna located vertically above the omnidirectional antenna. When the first polarization converter outputs horizontally polarized radiation, the feedline may form a straight vertical line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.