【正文】 大器、混頻器和調(diào)幅與解調(diào)。所以對于課題基于 multisim 的高頻電路的建模與計算機仿真分析的研究有很大的意義，并且由于對課題的研究，讓我更深入了解了有關(guān)高頻電路的概念。 關(guān)鍵詞 ：高頻電路； 建模； 計算機仿真； 調(diào)幅收音機 寧夏大學(xué)新華學(xué)院本科學(xué)位論文 II Abstract The high frequency circuit is the actual application has a large part, and is also essential to link munications systems. so based on the issue of high frequency circuit multisim modeling and simulation study of puter analysis is of great significance and the subject of research, let me better understanding about the concept of the high frequency the concepts underlying concept of high frequency of the high frequency circuit several parts to make a thorough analysis and puter simulations, tuning of an amplifier, sinusoidal waves oscillator, high frequency of power amplifier, frequency and am and introducing the few parts of the application and principles,the use of electronic design tools Multisim power amplifier circuit of from the program selection, cell design, ponent selection and other aspects of the specific parameters of design analysis, simulation testing the circuit at the same time , the simulation results of circuit characteristics, the circuit has been further the basic concepts to understand, analyze am radio works. Keywords: High frequency circuit； Modeling； Computer simulations； Am radio. 寧夏大學(xué)新華學(xué)院本科學(xué)位論文 III 目 錄 1 緒 論 .......................................................................................................................................... 1 選題背景、目的及意義 ..................................................................................................... 1 國內(nèi)外研究綜述 ................................................................................................................. 1 預(yù)期內(nèi)容和目標(biāo) ................................................................................................................. 2 研究方法 ............................................................................................................................. 2 2 高頻電路的有關(guān)基礎(chǔ)概念 ........................................................................................................ 3 高頻電路 ............................................................................................................................. 3 建模 ..................................................................................................................................... 3 建模的概念 ................................................................................................................... 3 建模過程中的主要活動包括 ....................................................................................... 3 計算機仿真 ......................................................................................................................... 3 仿真的定義 ................................................................................................................... 3 計算機仿真 .................................................................................................................. 4 MULTISIM 10 軟件介紹 ........................................................................................................ 4 3 高頻單元電路的建模與計算機仿真分析 ................................................................................ 5 調(diào)諧放大器 ......................................................................................................................... 5 調(diào)諧放大器的工作原理 .............................................................................................. 5 計算機仿真 .................................................................................................................. 7 結(jié)果分析 .................................................................................................................... 11 正弦波振蕩器 ................................................................................................................... 12 正弦波振蕩器的工作原理 ........................................................................................ 12 計算機仿真 ................................................................................................................ 13 結(jié)果分析 .................................................................................................................... 15 高頻功率放大器 ............................................................................................................... 15 高頻功率放大器的工作原理 .................................................................................... 15 計算機仿真 ................................................................................................................ 16 結(jié)果分析 .................................................................................................................... 19 混頻器 ............................................................................................................................... 19 混頻器的工作原理 .................................................................................................... 19 計算機仿真 ................................................................................................................ 20 寧夏大學(xué)新華學(xué)院本科學(xué)位論文 IV 結(jié)果分析 .................................................................................................................... 22 調(diào)幅與解調(diào) ....................................................................................................................... 22 調(diào)幅與解調(diào)工作原理 ................................................................................................ 22 計算機仿真 ................................................................................................................ 23 結(jié)果分析 .................................................................................................................... 25