小型宽带天线在电磁辐射检测系统中的应用与研究

发布时间：2018-07-11 17:38

本文选题：电磁辐射测量 + 小型化　；参考：《南京邮电大学》2017年硕士论文

【摘要】：随着现代科技的快速进步,生活中的各种电子产品的使用越发普及,这些电子设备在方便我们工作生活的同时,也带来了不可忽视的电磁辐射。研究表明,当电磁辐射强度达到一定程度时会对人类的健康造成影响。因此,避免电磁辐射的危害也逐渐引起了人们的关注。本文在对辐射测量的基本原理和方法研究的前提下,讨论了一种设计便携式的辐射测量计的方案。该方案将辐射测量系统划分为三个模块:天线探头、频率估计模块以及后端信息处理模块。天线探头作为检测信号的输入端,接收信号的输入功率。频率估计模块主要功能为区分输入信号频率和检测天线接收的功率。后端信息处理模块将采集到的信息传输到智能终端上进行分析和计算。天线探头部分采用了本文基于传统对拓Vivaldi天线改进的小型化超宽带天线,为了解决后期测量中对天线特性的补偿,提出了频率估计的理论设想。在对辐射测量计前端信号检测模块的设计与仿真的基础上,加工了超宽带天线和频率估计模块。在实际测试结果表明,改进的超宽带天线能够满足辐射测量计对信号检测的要求,另外,通过对频率估计模块的测试和数据分析,表明了该频率估计理论设想的可行性。在整合了A/D转化电路、串口/USB电路作为辐射测量计后端信息处理模块。给出了便携式辐射计在测量过程中的具体过程。
[Abstract]:With the rapid progress of modern science and technology, the use of various electronic products in life is becoming more and more popular. These electronic devices not only facilitate our work and life, but also bring electromagnetic radiation that can not be ignored. Studies have shown that when the electromagnetic radiation intensity reaches a certain level, it will have an impact on human health. Therefore, to avoid the harm of electromagnetic radiation has gradually attracted people's attention. Based on the research of the basic principle and method of radiation measurement, a scheme of designing portable radiometer is discussed in this paper. The radiation measurement system is divided into three modules: antenna probe, frequency estimation module and back-end information processing module. The antenna probe acts as the input of the detection signal and receives the input power of the signal. The main function of the frequency estimation module is to distinguish the input signal frequency from the power received by the antenna. The back-end information processing module transmits the collected information to the intelligent terminal for analysis and calculation. In the part of antenna probe, the miniaturized ultra-wideband antenna based on the traditional Vivaldi antenna is used in this paper. In order to compensate the antenna characteristics in the later measurement, a theoretical assumption of frequency estimation is put forward. Based on the design and simulation of the front-end signal detection module of radiometer, the ultra-wideband antenna and frequency estimation module are fabricated. The experimental results show that the improved UWB antenna can meet the signal detection requirements of the radiometer. In addition, the feasibility of the proposed frequency estimation theory is demonstrated by testing the frequency estimation module and analyzing the data. In the integration of the A / D conversion circuit, serial port / USB circuit as a radiometer back-end information processing module. The specific process of portable radiometer in the measurement process is given.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822.8

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