Mobile communication device and high-frequency composite unit used in the same
US6928298B2 · kind B2 · utility
34Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2001 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | Jul 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/406
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A mobile communication device, preferably in the form of a dual-band cellular phone, includes two communications systems supporting different frequency bands, such as DCS in the 1.8 GHz band and GSM in the 900 MHz band. The mobile communication device includes an antenna, a high-frequency composite unit, DCS and GSM transmitters, and DCS and GSM receivers. The high-frequency composite unit contains a diplexer, DCS and GSM high-frequency switches, DCS and GSM high-frequency filters or notch filters, and a directional coupler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.