目录摘要......................................................1Abstract..................................................2第一章前言...............................................31.1选题背景及研究意义.................................31.2国内外研究现状.....................................31.3设计内容及指标.....................................41.4论文结构...........................................4第二章混频器性能参数及原理...............................52.1性能参数...........................................52.1.1变频增益......................................52.2.2线性度........................................62.2.3噪声系数......................................72.2.4隔离度........................................72.2混频器工作原理分析.................................82.2.1平方律电路....................................82.2.2MOS管开关电路................................9第三章吉尔伯特单元混频器设计............................143.1LC选频网络......................................143.1.1LC选频网络的工作原理........................143.1.2设计中LC参数的选取..........................153.2吉尔伯特单元混频器................................163.3混频器仿真结果....................................18第四章改进后的正交输入上混频器..........................224.1上混频器结构......................................224.2仿真结果..........................................23第五章仿真结果及版图绘制................................275.1版图设计..........................................275.2版图检查..........................................295.2.1DRC检查.....................................295.2.2LVS检查.....................................31第六章总结与展望........................................326.1总结..............................................326.2展望..............................................33参考文献.................................................34致谢.....................................................36摘要混频器是WSN收发系统中的关键一环，其主要目的是为了实现对通讯系统中传输的信号按要求进行频率的搬移，从而能够发送或接受。本文设计的了一个基于0.18umCMOS工艺的针对特定频率信号的上混频器。设计要求为，输入信号为一个5MHZ的中频信号，输出射频频率为2.4GHZ—2.4835GHZ，混频器工作在1.8V电压下，总电流小于5mA，电压转换增益大于5dB，输入1dB压缩点大于-20dBm，噪声系数小于15dB，要求有较良好的线性度，端口隔离度。本混频器设计以吉尔伯特单元为主体，该拓扑结构有着较好的线性度和隔离度，以及较简单的转换增益，因而是普遍被选择的结构。输出由LC选频网络完成，LC并联结构作输出负载在直流中几乎不占用电压，因此提高了电源效率，在交流中可看作负载引导输出，同时控制增益，且其选频特性可以降低输出信号中的噪声。通过仿真分析，本文中设计的混频器在1.8V电源电压下工作，总电流为4mA，有近22dB的增益，噪声系数在要求输出的频段上为14.33dB，输入1dB压缩点为-13dBm。关键词：上混频器吉尔伯特单元LC选频网络AbstractMixerisakeypartinWSNtransceiversystem,Itsmainpurposeistorealizethefrequencyshiftofthesignalstransmittedinthecommunicationsystem,soastotransmitorreceivethesignals.Thispaperdesignsanup-converterforaspecificfrequencysignalbasedon0.18umCMOStechnology.Thedesignrequirementsarethattheinputsignalisanintermediatefrequencysignalof5MHz,andtheoutputRFfrequencyis2.4GHZ-2.4835GHZ,Themixeroperatesat1.8Vvoltage,thetotalcurrentislessthan5mA,thevoltageconversiongainismorethan5dB,theinput1dBcompressionpointisgreaterthan-20dBm,thenoisecoefficientisle...
