基于PSO的高线性四次分谐波下变频混频器设计  

Design of a High Linearity Down-conversion Mixer for Four Sub-harmonic Based on Particle Swarm Optimization Algorithm

作　　者：张银胜[1] 单慧琳[1] 周杰[1] 

机构地区：[1]南京信息工程大学,江苏南京210044

出　　处：《仪表技术与传感器》2012年第12期109-112,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(41075025);公益性行业(气象)科研专项(200906053);2011年江苏省研究生科研创新计划项目0782002072(CXZZ110618)

摘　　要：在介绍分谐波混频器的原理基础上,提出一种以粒子群算法作为全局搜索算法,以性能参数作为评估的混频器电路优化方法,利用ADS软件设计出一种本振为23 GHz,射频为92～94 GHz下的变频器电路,应用CST软件优化脊波导微带过渡结构,实现了W波段的信号到混频器射频端的引导。优化算法可以快速得到优化结果,仿真结果表明该下变频器的变频差损小于15dB,1dB压缩点较高,具有良好的线性度。This paper presents principles of a down-converted mixer for four sub-harmonic and proposes a particle swarm opti- mization algorithm as a global search algorithm, and the performance parameters is used as the assessment of the mixer circuit opti- mization method. The mixer circuit is designed by ADS software ,the LO and RF frequencies are 23 GHz ,92 -94 GHz respectively. The structure of ridge waveguide to microstrip transitions is optimized by simulation software CST, and W-band signals are directed to mixer RF side. The optimization algorithm can quickly get optimal results. The simulation results show that this mixer achieves higher 1 dB compression point,loss of frequency conversion which is less than 15 dB and good linearity.

关 键 词：分谐波混频器 下变频器 粒子群算法 脊波导微带过渡 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]