本文選題：瞬時測頻　切入點：射頻前端　出處：《電子科技大學》2015年碩士論文

【摘要】：瞬時測頻技術作為一項重要的能夠應用于現(xiàn)代電子戰(zhàn)中的技術,在經(jīng)過很多年的發(fā)展之后逐漸成熟。在現(xiàn)代電子戰(zhàn)和復雜的電磁環(huán)境下,如果能夠從敵方發(fā)出的信號中提取出各種雷達的復雜參數(shù),并掌握這些信息就有可能在戰(zhàn)爭中占據(jù)優(yōu)勢。測頻方法有很多,干涉儀比相法瞬時測頻是經(jīng)典的方法之一,它的核心思想是對信號進行頻率、相位和幅度的變換,也就是說由測量到的幅度值反過來推出它的頻率值。基于干涉儀比相法的瞬時測頻技術具有良好的瞬時性,所以能夠在工程實際中得到廣泛的應用。本文的研究重點是多通道的射頻前端,在設計過程中實現(xiàn)了三路輸出的寬帶接收前端,頻率范圍為1~2000 MHz,該方案能較好的實現(xiàn)射頻前端性能的要求,整個電路由帶通濾波器、帶阻濾波器、梳狀線帶通濾波器、寬帶威爾金森功分器、平衡放大器、均衡器、反饋放大器等部件組成。模塊性能的好壞取決于其整體的性能,所以首先需要對射頻前端的各項指標進行分解設計,選取能夠達到指標的高性能元件,然后將元件的指標帶入仿真電路的軟件中,驗證所選的元件是不是符合指標要求。詳盡的說明了驗證方式和元件的選取依據(jù)。對于該模塊的關鍵部件我們進行了設計和仿真,各項指標均能達到要求,性能良好。對于測頻測向技術來說,幅度相位一致性和幅度一致性是重要的設計指標,這也是在測試和調(diào)試過程中遇到的問題之一,經(jīng)過反復調(diào)試最終圓滿解決了問題。
[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.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM935.1

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相關期刊論文 前1條

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本文編號：1676283