Dielectric rod antenna
US5936589A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1997 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Oct 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dielectric rod antenna has a dielectric rod and a waveguide which receives one end of the dielectric rod to excite the dielectric rod. The dielectric rod is divided along its length into at least two sections including a hollow tubular dielectric sleeve and a dielectric internal rod telescopically received and secured in the hollow of the dielectric sleeve. One end of the dielectric internal rod makes a releasable-fit engagement with the adjacent end of the dielectric sleeve so that the overall length of the antenna can be fixed against change during the use. The overall radius and the hollow radius of the dielectric sleeve and the overall radius of the dielectric internal rod are determined such that the propagation constant in the dielectric sleeve and the propagation constant in the dielectric internal rod are equalized to each other. The end of the dielectric internal rod adjacent to the dielectric sleeve is tapered so as to converge towards the end extremity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.