Antenna device, and method of manufacturing antenna device
US7345644B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2004 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Mar 11, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A loop antenna device includes a loop antenna having a high noise resistance performance. In a loop antenna having a shield member covering a looped conductor portion formed in a loop shape from a conductive wire, a non-covered portion where the looped conductor portion is not covered is formed in correspondence with a portion of the conductive wire including a reference position for the symmetry of two terminals for connection between the antenna device and a reception circuit. This provides a balanced shield structure. Besides, a line for connecting one end of the conductive wire to the ground potential and a line for connecting the shield member to the ground potential are individually separate from each other, whereby reception of a voltage fall due to common impedance by the antenna is suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.