High-frequency module and communication apparatus
US7356349B2 · kind B2 · utility
9Cited by
9References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2004 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Jan 24, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/48
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A high-frequency module includes a switching circuit having a phase-shift circuit. The phase-shift circuit matches only PCS/DCS reception signals so as to be passed therethrough by setting a control-voltage input terminal to a Low level when receiving PCS/DCS signals, and attenuates PCS/DCS transmission signals to the PCS/DCS reception circuit side by setting the control-voltage input terminal to a Hi level when transmitting PCS/DCS signals. Also, another phase-shift circuit, which further attenuates the PCS transmission signal when transmitting the PCS signal, is provided in the DCS Rx terminal side of the phase-shift circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.