Antenna duplexer
US6891449B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2002 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Jan 31, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/19
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An antenna duplexer has a power durability to a signal input from an antenna terminal and has stable characteristics. The antenna duplexer includes an input terminal, a transmission filter including a surface acoustic wave (SAW) filter having an input port connected to the input terminal, a phase shifter having an input port connected to an output port of the transmission filter, a reception filter having an input port connected to an output port of the phase shifter, an output terminal connected to the output port of the reception filter, and an antenna terminal connected between the transmission filter and the phase shifter. The transmission filter has a power durability at the output port of the filter, being equal to or larger than a power durability at the input port of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.