Dual-band circularly polarized antenna structure
US11056789B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2019 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Dec 4, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dual-band circularly polarized antenna structure includes a microstrip line, an antenna unit and a ground. The antenna unit includes a first radiator and a second radiator. The first radiator has a feed-in portion and a first spiral pattern. The first spiral pattern spirals outwardly from a starting point close to the feed-in portion. The second radiator has a first grounding portion and a second spiral pattern. The second spiral pattern spirals outwardly from a starting point close to the first grounding portion in a manner non-overlapping with the first spiral pattern. One of the first and the second radiators has a second grounding portion. The microstrip line and the antenna unit are arranged apart. The feed-in portion of the first radiator of the antenna unit is coupled to the microstrip line. The first and the second grounding portions are coupled to the ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.