High-performance antenna structure
US5748156A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | May 16, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q19/09
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna structure has a rotatable dipole array constituting a driven antenna element, a cup mounted around the dipole, a first conductor connected to and extending from the antenna, and a first dielectric mounted around the first conductor. A second conductor is mounted around the first dielectric, and a second dielectric is mounted around the second conductor. A third conductor is mounted around the second dielectric, and the first and second conductors form a quarter-wavelength transformer. The first dielectric maintains a uniform spacing between the first and second conductors, and the third conductor defines a radio-frequency coupling cavity. The second dielectric electrically enlarges the cavity. Thus the physical dimensions of the structure can be reduced without sacrifice of its electrical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.