高性能多通道射频前端的设计与研制

发布时间：2018-03-28 12:15

本文选题：瞬时测频　切入点：射频前端　出处：《电子科技大学》2015年硕士论文

【摘要】：瞬时测频技术作为一项重要的能够应用于现代电子战中的技术,在经过很多年的发展之后逐渐成熟。在现代电子战和复杂的电磁环境下,如果能够从敌方发出的信号中提取出各种雷达的复杂参数,并掌握这些信息就有可能在战争中占据优势。测频方法有很多,干涉仪比相法瞬时测频是经典的方法之一,它的核心思想是对信号进行频率、相位和幅度的变换,也就是说由测量到的幅度值反过来推出它的频率值。基于干涉仪比相法的瞬时测频技术具有良好的瞬时性,所以能够在工程实际中得到广泛的应用。本文的研究重点是多通道的射频前端,在设计过程中实现了三路输出的宽带接收前端,频率范围为1~2000 MHz,该方案能较好的实现射频前端性能的要求,整个电路由带通滤波器、带阻滤波器、梳状线带通滤波器、宽带威尔金森功分器、平衡放大器、均衡器、反馈放大器等部件组成。模块性能的好坏取决于其整体的性能,所以首先需要对射频前端的各项指标进行分解设计,选取能够达到指标的高性能元件,然后将元件的指标带入仿真电路的软件中,验证所选的元件是不是符合指标要求。详尽的说明了验证方式和元件的选取依据。对于该模块的关键部件我们进行了设计和仿真,各项指标均能达到要求,性能良好。对于测频测向技术来说,幅度相位一致性和幅度一致性是重要的设计指标,这也是在测试和调试过程中遇到的问题之一,经过反复调试最终圆满解决了问题。
[Abstract]:As an important technology that can be used in modern electronic warfare, instantaneous frequency measurement technology has matured gradually after many years of development. In modern electronic warfare and complex electromagnetic environment, If the complex parameters of various radars can be extracted from the signals sent by the enemy, and the information can be grasped, it will be possible to occupy an advantage in the war. There are many methods for frequency measurement, and the interferometer phase comparison method is one of the classical methods for instantaneous frequency measurement. Its core idea is to transform the frequency, phase and amplitude of the signal, that is, to deduce its frequency value from the measured amplitude. So it can be widely used in engineering practice. The research focus of this paper is the multi-channel RF front-end. In the design process, the three-way output broadband receiver front-end is realized. The frequency range is 1 ~ 2 000 MHz. This scheme can meet the requirements of RF front-end performance. The whole circuit consists of band-pass filter, band-stop filter, comb line-band-pass filter, wideband Wilkinson power divider, balance amplifier, equalizer, etc. The performance of the module depends on its overall performance, so it is necessary to decompose each index of the RF front end and select the high performance component that can reach the target. Then the index of the component is introduced into the software of the simulation circuit to verify whether the selected component meets the requirements of the index. The verification method and the selection basis of the component are explained in detail. The key components of the module are designed and simulated. For frequency direction finding technology, amplitude phase consistency and amplitude consistency are important design indexes, which are also one of the problems encountered in the process of testing and debugging. After repeated debugging, the problem was solved satisfactorily.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM935.1

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