【作者】 李建新；

【导师】 陈晓龙； 董士伟；

【作者基本信息】 西安电子科技大学 ， 仪器仪表工程， 2014， 硕士

【摘要】 近年来,新能源开发是各国迫切需要解决的一个问题,而太阳能空间站则成为了一个重要的研究方向,因此微波无线能量传输技术(MPT:Microwave Power Transmission)也成为了当今的研究热点。微波信号具有频率高、容量大、能远距离且低损耗地在大气中传播的优点。于是本文在前人的研究基础上设计了一种微波整流电路,能够接收5.8GHz的微波信号并转换为直流输出。微波整流电路包括三个主要的模块,输入低通滤波器、肖特基整流二极管和输出滤波器。首先,根据提出的设计指标,本文运用阶跃阻抗法设计了能够滤除5.8GHz以上的高频信号的低通滤波器,再对其优化,最终设计完成的滤波器在11.6GHz处的衰减幅度达到-25.939dB,在17.4GHz处的衰减幅度达到-17.899dB。接着选择了HSMS-286B型的整流二极管,对二极管的进行了详细的理论分析,建立了仿真模型并完成了阻抗匹配。再用一段1/4波长微带线和100pF的电容组成输出滤波器。将各个模块组合起来进行整体仿真,最终实现了在输入功率为11.3dBm时,在300欧姆的负载上70.49%的整流效率,验证了方案的可行性。更多还原

【Abstract】 The development of new energy sources is a problem that need to be solved urgently in all countries, and the solar power station would become an important research direction. Therefore microwave power transmission (MPT) has become a research focus today. Microwave signals have the advantages of high frequency, large capacity, long distance and low loss in transmission in the atmosphere. Then on the basis of predecessors’ research, this article designs a kind of microwave rectifier circuit, which could receive 5.8 GHz microwave signal and convert it to dc output.Microwave rectifier circuit consists of three major modules, the input low-pass filter, the Schottky diode and the output filter. First, according to the proposed design index, this article uses the step impedance method to design a low-pass filter to filter out the high frequency signal more than 5.8 GHz. After ptimization, the attenuation rate of filter reachs 25.939 dB at 11.6GHz and 17.899 dB at 17.4GHz. This article selects the HSMS-286B rectifier diode, analyses the diode, sets up the simulation model and completes the mpedance matching. The output filter has a quarter wavelength microstrip line and a 100pF capacitor. All modules are combined to carry out the whole simulation. Finally, the efficiency of rectification reaches 70.49% on 300 ohm load, when the input power is 11.3dBm.更多还原