Antennas for use in portable communications devices
US6034638A · kind A · utility
350Cited by
18References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1996 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Mar 14, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q19/09
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In one embodiment, an antenna has four equally spaced monopole elements mounted in a symmetric array on the outer surface of a solid cylinder structure. The cylinder has a high dielectric constant, and extends from a conductive ground plane. The monopole elements can be switched by switching elements so that one or more is active, with the others acting as parasitic directors/reflectors being connected commonly to ground or left in an open circuit condition to be effectively transparent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.