發(fā)布時(shí)間：2018-06-06 10:44

  本文選題：W波段低噪放 + W波段檢波器��； 參考：《南京理工大學(xué)》2015年碩士論文

【摘要】：本文對兩種類型的W波段寬帶接收機(jī)(直檢式和外差式)的內(nèi)部關(guān)鍵部件進(jìn)行了深入研究,并且針對低噪放的寬帶低噪聲特性、檢波器的大動(dòng)態(tài)高靈敏度特性、混頻器的寬帶低變頻損耗特性分別對相關(guān)部件作了設(shè)計(jì),達(dá)到了預(yù)定的要求。首先,本文研究了低噪放的相關(guān)設(shè)計(jì)。通過對低噪放的工作原理的分析,逐一論述了低噪放設(shè)計(jì)中所要注意的技術(shù)指標(biāo),并通過對市場上流通的芯片的檢查,最后選擇了TNL4-110芯片作為低噪放單片,提高了組件的設(shè)計(jì)效率。并且,在此基礎(chǔ)上,自主設(shè)計(jì)了其偏置電路,保證了低噪放的正常工作。另外,根據(jù)需求,分別設(shè)計(jì)了適合兩種接收機(jī)(直檢式接收機(jī)和外差式接收機(jī))的低噪放方案,并實(shí)現(xiàn)了所要求的指標(biāo)。其次,本文針對直檢式接收機(jī)中的檢波器展開到了相關(guān)研究。通過對檢波器的工作原理的分析以及技術(shù)指標(biāo)的論述,本文選擇了HSCH-9161型肖特基勢壘二極管作為檢波二極管。以此為基,設(shè)計(jì)了匹配電路以及低通濾波器,完成了檢波器的設(shè)計(jì)。再次,本文針對外差式接收機(jī)中的混頻器展開到了相關(guān)研究。通過對混頻器的工作原理的分析以及技術(shù)指標(biāo)的論述,本文選擇了DMK-2790型肖特基勢壘二極管作為混頻管。在此基礎(chǔ)上,設(shè)計(jì)了一個(gè)180度環(huán)形電橋作為輸入信號的隔離部件,設(shè)計(jì)了混頻管的匹配電路,最終完成了混頻器的設(shè)計(jì)。最后,本文仿真設(shè)計(jì)了波導(dǎo)轉(zhuǎn)微帶的對脊鰭線過渡結(jié)構(gòu),為微帶線組件與波導(dǎo)接口相接提供了一個(gè)合理的手段。
[Abstract]:In this paper, the internal key components of two types of W-Band wideband receivers (direct-detection and heterodyne) are studied in depth, and the large dynamic and high sensitivity characteristics of the geophone are analyzed for the wideband and low-noise characteristics of the low-noise amplifier. The wideband low-frequency loss characteristics of mixers are designed to meet the predetermined requirements. Firstly, this paper studies the design of low noise amplifier. Based on the analysis of the working principle of low noise amplifier, this paper discusses the technical indexes that should be paid attention to in the design of low noise amplifier one by one. After checking the circulating chips in the market, TNL4-110 chip is selected as the single chip of low noise amplifier. The design efficiency of components is improved. On this basis, the bias circuit is designed independently to ensure the normal operation of low noise amplifier. In addition, according to the requirement, the low noise amplifier scheme suitable for two kinds of receivers (direct-detection receiver and heterodyne receiver) is designed, and the required index is realized. Secondly, this paper studies the geophone in direct receiver. Based on the analysis of the working principle of the geophone and the discussion of the technical specifications, the HSCH-9161 Schottky barrier diode is selected as the detector diode in this paper. Based on this, the matching circuit and low pass filter are designed, and the detector is designed. Thirdly, this paper studies the mixer in heterodyne receiver. Based on the analysis of the working principle and technical specifications of the mixer, the DMK-2790 Schottky barrier diode is selected as the mixer. On this basis, a 180 degree annular bridge is designed as the isolation part of the input signal, and the matching circuit of the mixer is designed. Finally, the mixer is designed. Finally, the transition structure of the waveguide to microstrip is simulated and designed, which provides a reasonable method for the interface between the microstrip and the waveguide.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN851

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 薛偉;W波段寬帶直接檢波接收前端研究[D];電子科技大學(xué);2013年

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本文編號：1986253