| 摘要 |
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 lambda2, corresponding to a communication frequency. The control unit and the vibrator operate at frequency lambda1. The coils have a self-resonant frequency of lambda2 and form a short-circuit connection at frequency lambda1 and an open-circuit connection at frequency lambda2. The capacitors form an open-circuit connection at frequency lambda1 and a short-circuit connection at frequency lambda2. This reduces the number of antenna component members mounted on a radio and an antenna's size. |
