Radio
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United States of America Patent
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Dec 10, 2013
Grant Date -
Apr 7, 2011
app pub date -
Jun 16, 2009
filing date -
Jun 27, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a mobile phone, a vibrator, arranged on a substrate, has two power supply terminals. The vibrator's first and second terminals are each connected to a control unit via a first wiring, a coil and a second wiring. A capacitor is connected between the two terminals' first wirings One end of an antenna sub-element is connected to the first terminal's first wiring and one end is connected to a radio circuit unit. An antenna unit operates at frequency λ2, corresponding to a communication frequency. The control unit and the vibrator operate at frequency λ1. The coils have a self-resonant frequency of λ2 and form a short-circuit connection at frequency λ1 and an open-circuit connection at frequency λ2. The capacitors form an open-circuit connection at frequency λ1 and a short-circuit connection at frequency λ2. This reduces the number of antenna component members mounted on a radio and an antenna's size.
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