3.4.2高增益模块设计考虑… …45 3.4.3衰减器设计考虑…50 3.4.4高增益模块的性能优化…52 第四章下变频混频器研究与设计…55 4.1前言… 55 4.2有源混频器到电流驱动型无源混频器的过渡… 55 4.3电流驱动型无源混频器的性能分析… 57 4.3.1增益和阻抗特性分析……… 58 4.3.2噪声分析… 61 4.3.3非线性分析… 67 4.4一种可变增益电流驱动型无源混频器设计… 67 4.4.1整体架构与设计指标… 67 4.4.2跨导单元与混频器开关设计考虑… 68 4.4.3混频器开关管的偏置设计考虑· …… 71 4.4.4跨阻运算放大器设计考虑… 72 第五章芯片实现与仿真测试结果… 77 5.1低噪声放大器与混频器级联仿真结果 77 5.1.1最高增益与噪声系数仿真结果…77 5.1.2线性度级联仿真结果… 78 5.2射频前端电路芯片实现 79 5.3芯片测试结果… 80 5.3.1噪声系数测试结果… 80 5.3.2线性度测试结果… …81 5.3.3衰减器增益台阶以及S11测试结果…82 5.3.4性能总结与对比 83 第六章设计总结与展望… 85 6.1设计总结… 85 6.2展望… 86 参考文献… …87 致谢… …91II 3.4.2 高增益模块设计考虑·················································45 3.4.3 衰减器设计考虑·······················································50 3.4.4 高增益模块的性能优化··············································52 第四章 下变频混频器研究与设计····················································55 4.1 前言 ···············································································55 4.2 有源混频器到电流驱动型无源混频器的过渡····························55 4.3 电流驱动型无源混频器的性能分析········································57 4.3.1 增益和阻抗特性分析·················································58 4.3.2 噪声分析································································61 4.3.3 非线性分析·····························································67 4.4 一种可变增益电流驱动型无源混频器设计·······························67 4.4.1 整体架构与设计指标·················································67 4.4.2 跨导单元与混频器开关设计考虑··································68 4.4.3 混频器开关管的偏置设计考虑·····································71 4.4.4 跨阻运算放大器设计考虑···········································72 第五章 芯片实现与仿真测试结果 ·····················································77 5.1 低噪声放大器与混频器级联仿真结果·····································77 5.1.1 最高增益与噪声系数仿真结果·····································77 5.1.2 线性度级联仿真结果·················································78 5.2 射频前端电路芯片实现·······················································79 5.3 芯片测试结果···································································80 5.3.1 噪声系数测试结果····················································80 5.3.2 线性度测试结果·······················································81 5.3.3 衰减器增益台阶以及 S11 测试结果······························82 5.3.4 性能总结与对比·······················································83 第六章 设计总结与展望 ·································································85 6.1 设计总结 ·········································································85 6.2 展望 ···············································································86 参考文献 ·····················································································87 致谢 ···························································································91