Compact cellular phone
US7031744B2 · kind B2 · utility
37Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2001 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Dec 22, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0805
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A compact cellular phone with a foldable configuration and two planar antennas having outward directivities are provided inside the compact cellular phone in the foldable configuration. An interval between the two planar antennas provided to a pair of housings is equal to or wider than a width of a human palm in a state in which the compact cellular phone is open. The two planar antennas are planar inverse F-type antennas or patch antennas and impedance around each of the two planar antennas is measured. Then, one of the two planar antennas, which has a preferred transmission characteristic, is selected and used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.