文档介绍：毕业设计论文
摘要
随着现代无线通信的发展,微波功率放大器已成为微波通信设备的重要部件,它的性能优劣在很大程度上影响着通信质量。因而,对微波功率放大器的研究和设计也越来越受关注。
本文分析了微波功率放大器的非线性特性,介绍了其阻抗匹配电路的方法,并根据指标要求对晶体管的输入输出网络进行阻抗匹配,用微带线实现匹配电路。用ADS软件进行优化仿真,最后设计出大信号微波功率放大器。通过多次调试、测试实验,。
关键字:微波功率放大器大信号优化设计 CAD
Abstract
With the development of munication,microwave power amplifier has been an ponent in munication, its capability effects the quality of munication in a large extent. So it has been paid more and more attention in the research and design of microwave power amplifier.
In this paper, firstly the nonlinear characteristics of the microwave power amplifier have been analyzed, and several impedance matching circuits for the power amplifier have been introduced. Then according to the required features, the input and output impedance works have been respectively designed for a given transistor, using microstrip line model to solve this problem. And after having used the ADS software to make S-parameter simulation and optimization, a large signal microwave power amplifier is finally designed. With a series of rigorous experiments and tests, the maximum gain of the designed power amplifier can be up to 7dB .
Key word: microwave, power amplifier, large signal, optimization design, CAD
目录
第一章引言……………………………………………………(1)
第二章微波功率放大器的非线性特性…………………………(2)
单级功率放大器的非线性特性……………………………(2)
级联功率放大器的非线性特性 …………………………(6)
微波功率放大器线性化技术…………………………(7)
第三章微波功率放大器的设计原理……………………………(9)
功率放大器的稳定性………………………………………(9)
功率放大器的匹配设计……………………………………(11)
功率放大器的实现方法……………………………………(14)
功率放大器的偏置电路设计………………………………(17)
第四章功率放大器的电路仿真与实验研究……………………(19)
……………………(19)
GaAs场效应功率晶体管………………………………(20)
……………………………(23)
……………………………(32)
第五章结束语………………………………………………………(33)
参考文献……………………………………………………………(34)
致谢………………………………………………………………(36)
第一章引言
在现代微波无线通信系统中,信息传输正朝着多载波、大容量、高速度方向迅猛发展。微波功率放大器是微波通信设备的重要部件,它的性能在很大程度上影响通信的质量。比如,微波功率放大器增益减小,输出功率下降,则会引起信噪比降低,或是通信距离减小;三阶互调