Low-profile adjustable-band antenna
US6188371A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1999 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Jul 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0442
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A low-profile antenna includes a ground-plane element defining a ground plane and an elongated radiator element configured and disposed in relation to the ground plane to define a vertical loop when the ground plane is horizontally disposed. A substantial broad segment of the radiator element is parallel to the ground plane. One end of the radiator element is connected to the ground-plane element and another end of the radiator element having spaced-apart legs with feet is capacitively coupled to the ground-plane element by dielectric spacing elements that are disposed between the feet of the radiator element and the ground-plane element. A conductive-material layer contacts the feet between the feet and the dielectric spacing element. An exposed portion of the conductive-material layer that extends from beneath the feet of the radiator element includes removal tabs for enabling the capacitive coupling to be adjusted by removing at least some of the exposed tabs. The adjustable capacitive coupling and the dimensions and configuration of the radiator element are such as to enable the radiator element to resonate within an adjustable band of frequencies within a predetermined range o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.