Duplexer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jun 30, 2015
Grant Date -
Jan 3, 2013
app pub date -
Sep 11, 2012
filing date -
Apr 20, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A duplexer includes: a reception filter connected between a reception terminal and an antenna terminal; a transmission filter connected between a transmission terminal and the antenna terminal; and a wiring substrate including the reception filter and the transmission filter on an upper surface, the reception terminal, the transmission terminal and the antenna terminal being formed on a lower surface, and a reception electrode electrically connected to the reception terminal, a transmission electrode electrically connected to the transmission terminal, an antenna electrode electrically connected to the antenna terminal, and a circular metal layer surrounding the reception, transmission and antenna electrodes, and electrically connected to a ground being formed on an upper surface, wherein a shortest distance between a side of the circular metal layer closest to the reception and transmission terminals and the reception electrode is larger than a width of the side of the circular metal layer.
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