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射频积体电路 (RFIC) 晶片主要可分为功率放大器 (power amplifier)、收发器 (transceiver)、锁相回路 (phase lock loop) 三大部分。目前锁相回路与收发器已逐渐整合于系统晶片 (SoC)，剩下的功率放大器成为最后等待整合的圣杯 (Holy Grail)。功率放大器大量使用于手机、Wi-Fi无线区域网路、平板电脑、蓝芽等网通产品，如GSM手机使用1颗，GPRS使用2颗，3G使用4颗、3.5G使用6颗，而WLAN 802.11a、802.11a+g使用1～2颗， 802.11n则增至4～6 颗。随着手持无线通信装置渗透率提升，功率放大器使用量将大幅提升。

　　本书的目的系提供一功率放大器的设计平台，以帮助设计者透过简单操作步骤，循序渐进地完成设计流程，如分析最佳匹配阻抗、最大输出功率传递、稳定度、匹配网路、大讯号分析、功率增进效率等重要功率放大器设计参数。最后以四个功率放大器实例设计完成验证。

　　Power amplifier (PA) is the most important circuit in transmitter in mobile communication systems, which is used to convert a DC power into a radio-frequency (RF) signal of significant power to drive the antenna of the transmitter. The PA entails the issues of the output power at output 1-dB gain compression point (OP1dB), saturated output power (Psat), power added efficiency (PAE), output third-order intermodulation intercept points (OIP3), input/output return losses, and power gain. The objective of this book is to introduce the design flow, specifications and circuit design procedure of the commonly used PAs. The design procedure divides into two parts: device characteristics and circuit simulations. Each PA circuit is simulated by the Agilent Advanced Design SystemTM (ADS) simulator which design guide for PA design has been already built.

　　This book is used in 3 to 4-week Lab course incorporated with ADS design and PA implementation. The book provides a step-by-step design procedure for the PA design. The design flow describes the processes of circuit design. First, we will specify the specifications and make the designed PA to conform the specifications. Meanwhile, we will select the proper device and bias conditions to meet the aforementioned requirement. In the beginning of circuit design, we will check the DC, AC and load-pull analyses of the device by using Agilent ADS simulator. In the DC analysis, we will show the I-V curve to determine the bias point and classes of the PA. In the load-pull analysis, we will use one-tone load-pull simulation to calculate the maximum output power and load impedance. The simulator also shows S-parameters, stability, and Gp circles in the small signal analysis. Then, we will choose and matching networks according to frequency, bandwidth, and gain, etc. The PA should match the output and input impedances to achieve the maximum output power and PAE. Subsequently, the one-tone and two-tone simulations are performed.

　　In the large signal analysis, we will perform one-tone and two-tone simulations which estimate OP1dB, Psat, PAE, and OIP3. We will find the optimum performance for the requirements of the specifications by careful adjustment of device selection, bias conditions and matching networks. Thus, the circuit design can be completed.

　　The organization of this book text is as follows: Chapter 1 presents a general the specifications and design flow of PA. Chapter 2 presents categories of PA operation and S-parameter representation. Chapter 3 gives the stability analysis. Chapter 4 introduces Cripps loadline method. Chapter 5 presents the gain and power matching, respectively. Chapter 6 introduces large signal analysis. Chapters 7 to 10 give the design examples of single and two-stage class AB, push-pull class B and class E PA designs.

作者简介

邱焕凯 (Hwann-Kaeo Chiou)

　　毕业于国立台湾大学电机所博士班，曾担任中山科学院、明碁电通无线通讯部门研发主管，目前为国立中央大学电机工程学系教授。

　　专长与研究领域为射频积体电路 (RFIC)、单石微波积体电路 (MMIC)、微波主被动电路、微波工程与无线通信技术。

林贵城 (Kuei-Cheng Lin)

　　毕业于国立中央大学电机所硕士班，目前为国家晶片系统设计中心副研究员。

　　专长与研究领域为射频积体电路、微波积体电路。

作者序
1.    功率放大器规格、设计流程
2.    功率放大器操作类别、元件S参数跟高频特性
3.    稳定度分析
4.    克理普斯负载线法（Cripps loadline method）
5.    增益匹配、功率匹配
6.    功率放大器大讯号模拟
7.    设计实例―Class AB功率放大器
8.    设计实例―Two-stage Class AB功率放大器
9.    设计实例―Push-pull Class B功率放大器
10.    设计实例―Class E功率放大器

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ADS应用于射频功率放大器设计与模拟 电子书 下载 mobi epub pdf txt 2024

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