Integrated dual band H-field shielded loop antenna and E-field antenna
US6924773B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2004 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Sep 30, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dual band antenna system that combines into a single integrated device an H-field shielded loop antenna and an E-field antenna. The system includes an unshielded section bounded on each end by first and second shielded sections, respectively. Input frequency filters are electrically connected to the first shielded section to selectively pass one of a first radio frequency signal or a second radio frequency signal through the first shielded section. Output frequency filters electrically connected to the unshielded section for switching between two paths of transmission and associated modes of operation: (i) a first mode (operating as an H-field antenna) in which an H-field transmission pattern is generated in the first and second shielded sections; and (ii) a second mode (operating as an E-field antenna) wherein an E-field is radiated via the E-field antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.