Handy-phone with shielded high and low frequency circuits and planar antenna
US6031494A · kind A · utility
22Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1997 |
| Grant date | Feb 29, 2000 |
| Priority date | — |
| Expiry date | May 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/243
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved, compact, lightweight handy-phone provided with a built-in directional planar antenna is provided. The planar antenna is mounted on a portion of a high-frequency printed wiring board, and a shielding case covers the high-frequency printed wiring board with a surface of the portion exposed. A maximum linear size of the shielding case in the direction of main polarization of the planar antenna is nearly equal to half the wavelength of an electromagnetic wave to be radiated by the planar antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.