Dielectrically loaded antenna
US8624795B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2010 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Nov 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q11/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dual-band dielectrically loaded multifilar antenna has a first group of helical conductive antenna elements extending from feed connection nodes to an annular linking conductor 20U, and a second group of conductive helical antenna elements extending from the feed coupling nodes in the direction of the linking conductor to substantially open-circuit ends spaced from the linking conductor. The helical elements of the first group are half-turn elements having an electrical length of approximately one half wavelength at a first operating frequency of the antenna. The helical elements of the second group are approximately quarter-turn helical elements having an electrical length in the region of one quarter wavelength and a second operating frequency of the antenna. Each group of elements is associated with a respective mode of resonance for circularly polarized radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.