In todays society, mobile phone has become a part of our life, people are more and more inseparable from smart phones. With the development of mobile communication technology, the exponential growth of mobile data drives the demand for more wireless spectrum. Smart phones need to support a variety of communication modes and a variety of frequency bands. The front-end module of mobile radio frequency is the core component of mobile communication system, and its functional requirements are becoming more and more complex.
        The rf front-end module of mobile phone is the only way to connect the communication transceiver chip and the antenna. Its performance directly determines the communication mode that a mobile terminal can support, as well as important performance indicators such as received signal strength, call stability and transmitted power, which directly affects the end user experience. The rf front-end of mobile phone mainly includes power amplifier, antenna switch, filter/duplexer, low-noise amplifier and other devices. The 6-channel and 8-channel output antenna switch series products developed by the company are applied in mobile phones. The series of chips have the excellent performance of low loss, high power, high isolation, high linearity, high stability and high reliability, and the performance index is no less than similar foreign products.