Structure for controlling the radiation pattern of a linear antenna
US6515634B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2000 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Dec 18, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/49
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A linear antenna capable of adjusting directivity and impedance matching comprises: a common dipole in which two cylindrical conductors each having a length of &lgr;/4 of the transmission frequency are provided linearly (thus having a total length of &lgr;/2); a plurality of linear parasitic elements that are provided at positions separated by a distance D2 from the axis of the common dipole so as to surround the common dipole; and a U-shaped parasitic element for realizing impedance matching that is arranged in proximity to one end of the common dipole. Each of the linear parasitic elements are arranged parallel to the common dipole and have a length of one half-wavelength of a desired transmission frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.