摘要
提出一种依据Smith圆图和CAD软件设计低噪声放大器的新方法。为了设计匹配电路的需要,首先给出了稳定性判别条件及其圆方程、噪声系数及其圆方程和资用功率增益及其圆方程,用图解的方法将三种参量标注在同一源反射平面内。然后利用圆图和CAD软件分别按照最佳噪声和输入匹配原理,设计了输入匹配电路;按照共轭匹配原理设计了输出匹配电路。最后利用CAD软件对所设计的电路进行了仿真并制作了实际电路。仿真结果和测试结果表明,利用图解和CAD相结合的方法能够方便、有效地进行电路设计,提高设计效率。
A kind of novel method is presented to design Low Noise Amplifier based on Smith Chart and CAD software. In order to satisfy the design demand, above all, stability condition with it＂ s circle equation, noise figure with it＂ s circle equation, and available gain with it＂ s circle equation arc given out. In succession, input matching circuit is designed based on simultaneous optimum noise and input matching principle and output matching circuit is designed as well based on conjugate matching principle respectively by using Smith chart and CAD method.Lastly,the designed circuit is simulated by utilizing CAD software and practical circuit is also made up.The simulation and test results show that the hybrid method of Graphic and CAD is able to design circuit efficiently and easily, save development time and enhance design efficiency.
出处
《微计算机信息》
北大核心
2007年第02Z期302-304,共3页
Control & Automation
基金
国家863项目(NO.W2210)
作者简介
麻来宣：硕士研究生.麻来宣（1980-）：男，河南平舆人，硕士研究生．研究方向：微波电路与系统，E—mail：mars982133@163．com；通讯地址：（713800 陕西三原市25#研究生三队）麻来宣
张晨新（1969～）：男，河南修武人，博士，副教授，硕士研究生导师，主要从事电磁辐射与散射，微波电路与系统等领域研究工作。
