Low-profile multi-band antenna
US5880697A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1996 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Sep 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/385
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multi-band low-profile antenna includes a conductive ground-plane element; a first radiator element mounted on the ground-plane element to define a first vertical loop; a second radiator element mounted on the ground-plane element to define a second vertical loop; and a coupling element mounted on the ground-plane element to define a vertical coupling loop, with one end portion of the coupling element being connected to a feed terminal. In at least one embodiment, the first radiator element and the second radiator element are of such dimensions and are so disposed as to be parasitically coupled to each other, to cause the first radiator element to resonate at a first predetermined VHF frequency and to cause the second radiator element to resonate at a second predetermined VHF frequency. The coupling element is of such dimensions and is so disposed in relation to the first radiator element and the second radiator element as to cause a signal at the first predetermined VHF frequency to be inductively coupled between the first radiator element and the feed terminal and to cause a signal at the second predetermined VHF frequency to be inductively coupled between the second radiator e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.