说明：  本书以移动通信系统为背景，系统介绍射频系统的各个模块的基本原理，分析其设计方法，以及射频系统的构成与设计的基本知识。本书内容主要包括：射频电路的特点与常见的移动通信系统、传输线、噪声与非线性失真、低噪声放大器、功率放大器、振荡器、锁相与频率合成技术、调幅与检波、调角与解调、数字调制与解调、收发信机的结构与设计等
(The book mobile communication system as the background, the system introduces the basic principles of the various modules of the RF system, analyze the basics of composition and design of its design methods, and RF systems. This book includes: the RF circuit and the common features of a mobile communication system, transmission lines, noise and nonlinear distortion, low noise amplifiers, power amplifiers, oscillators, PLL frequency synthesizer technology, AM and detection, and de-tune the angle and other tone, the digital modulation and demodulation, the transceiver structure and design)