手机基本原理: ETACS、GSM蜂窝手机是一个工作在双工状态下的收发信机。一部移动电话包括无线接收机(Receiver)、发射机(Transmitter)、控制模块(Controller)及人机界面部分(Interface)和电源(Power Supply)。-The basic principles of mobile phones: ETACS, GSM cellular phone is a work in the duplex state of the transceiver. A mobile phone, including wireless receiver (Receiver), the transmitter (Transmitter), control module (Controller) and the part of man-machine interface (Interface) and power (Power Supply).