Broad band dipole element and array
US5892486A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1996 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Oct 11, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/062
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved dipole antenna array with high radiation directivity and broad bandwidth is disclosed. Each dipole antenna is driven by a balun structure composed of an unbalanced J-shaped transmission line placed over a pair of ground plane extensions that are separated by a channel. The dipole antenna arms are connected to an intermediate point on the ground plane extensions so that the balun structure extends beyond the dipole antenna. The length of the dipole arms, their position on the ground plane extensions, and the extent to which the balun extends beyond the dipole antenna can be chosen to determine the desired operating frequency range. The antennas are fabricated on ground and circuit planes separated by a dielectric material and composed of conducting material deposited on dielectric sheets. A planar array of dipole antennas is formed with the ground plane circumscribing each antenna in the array to improve directivity. An electromagnetic reflecting plane is placed parallel to the array to increase radiation efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.