Antenna device
US6753815B2 · kind B2 · utility
18Cited by
2References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 16, 2003 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Jan 16, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention is an antenna apparatus attached to an electronic device and includes an antenna section (11) having an antenna element (18) provided with two or more power supply points (19) and two or more earth points (20); and an earth point switch (21) which is provided correspondingly to each earth point (20) and connects or disconnects the earth point (20) from a ground. Selectively turning on or off the earth point switch (21) selects the earth point to adjust the resonance frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.