| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a portable electronic apparatus having an enhanced antenna radiation efficiency for eliminating the cause of antenna radiation efficiency degradation because of heat loss occurred in any part of an emitter consisting of an antenna and a battery when the portable electronic apparatus battery causes resonance. <P>SOLUTION: A portable electronic apparatus of FIG.1 is provided to settle the above problem. The portable electronic apparatus of FIG.1 includes: an antenna; a power supply circuit for supplying operation voltage to the antenna; and a battery for supplying electric power to a power supply circuit. In addition, a resonance circuit synchronizing with a communication frequency of the antenna is inserted within a connection part of any one of a first connection part between a battery positive electrode and a power supply circuit or a second connection part between a battery negative electrode and a circuit ground. Even if the battery causes unnecessary resonance, the resonance circuit cuts off the high-frequency current. At the same time, the flow of high-frequency current into a battery generated by the antenna operation is also cut off, to inhibit the heat loss of battery itself. <P>COPYRIGHT: (C)2012,JPO&INPIT |
