| 摘要 |
PURPOSE: An antenna switch is provided to mount a capacitor and an inductor operating as low pass filters of switches on the highest layer of many layers, and to change characteristics of individual elements such as the capacitor and the inductor, thereby efficiently controlling characteristics of the antenna switch. CONSTITUTION: Many layers(L1-L10) form strip lines. Electrodes are formed on the highest layer(L0) of the layers(L1-L10). The highest layer(L0) mounts as follows. Many ground electrodes(GND) and an antenna electrode(ANT) are mounted thereon. Control signal input electrodes(VC1,VC2) input control signals. Transceiving electrodes(GSM(Global System for Mobile Communications)-Tx,GSM-Rx,DCS(Digital Communication Service)-Tx,DCS-Rx) connected to signal transceiving systems are formed through the antenna electrode(ANT). Individual elements such as a capacitor(C) and an inductor(L) are mounted.
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