本文選題：低噪聲放大器 + 寬帶阻抗匹配　； 參考：《安徽大學(xué)》2015年碩士論文

【摘要】：在當(dāng)今的信息社會(huì)里,無處不在的通信網(wǎng)絡(luò)就像空氣一樣存在于我們周圍,成為了現(xiàn)代生活中不可或缺的重要組成部分。而在蓬勃發(fā)展的通信技術(shù)中,寬帶/超寬帶通信技術(shù)以其大容量、高速率的優(yōu)點(diǎn)而為人們所重視。在寬帶/超寬帶通信接收機(jī)中,低噪聲放大器(Low Noise Amplifier, LNA)是一個(gè)關(guān)鍵的組成部件,LNA位于接收機(jī)的前端,其性能好壞直接決定了系統(tǒng)的接收靈敏度和整機(jī)的噪聲系數(shù),因此對寬帶/超寬帶低噪聲放大器的研究是寬帶通信技術(shù)研究領(lǐng)域中的重要研究內(nèi)容。本論文的主要內(nèi)容是設(shè)計(jì)和實(shí)現(xiàn)微波寬帶/超寬帶低噪聲放大器。文章首先闡述和分析了微波寬帶低噪聲放大器的基礎(chǔ)理論和設(shè)計(jì)方法,理論部分主要涉及了傳輸線理論、二端口網(wǎng)絡(luò)的噪聲分析以及晶體管的噪聲特性等,而在設(shè)計(jì)方法上,則重點(diǎn)闡述了基于噪聲最優(yōu)源阻抗匹配的放大器選取方法、基于柵漏寄生電容負(fù)反饋的寬帶阻抗匹配設(shè)計(jì)方法等內(nèi)容,為后續(xù)的微波寬帶低噪聲放大器的設(shè)計(jì)提供了理論和方法支撐。本文的第三章針對超寬帶(UWB)通信系統(tǒng),設(shè)計(jì)了一款3.1-10.6GHz的寬帶低噪聲放大器,該放大器采用臺(tái)灣穩(wěn)懋商用0.15um pHEMT工藝設(shè)計(jì),在設(shè)計(jì)方法上充分利用了晶體管的本征柵漏寄生電容來拓展LNA的工作帶寬,最終該LNA在仿真上實(shí)現(xiàn)了大于15dB的增益和小于1.8dB的噪聲系數(shù)以及較好的輸入輸出回波損耗性能,充分證明了該設(shè)計(jì)方法的有效性。本文的第四章針對ISM多頻段通信系統(tǒng)的要求,設(shè)計(jì)和實(shí)現(xiàn)了一款50MHz-1.8GHz的HMIC超寬帶低噪聲放大器,該放大器利用了分立的商用ATF放大晶體管在PCB板上設(shè)計(jì)實(shí)現(xiàn),在設(shè)計(jì)上采用了一種改進(jìn)了的Kukielka放大器結(jié)構(gòu),測試結(jié)果表明該放大器在工作頻段內(nèi)具有大于26dB的增益和小于1.4dB的噪聲系數(shù),達(dá)到了設(shè)計(jì)目標(biāo),同時(shí)也驗(yàn)證了該LNA在設(shè)計(jì)理念和方法上的正確性。本論文針對UWB通信系統(tǒng)和ISM多頻段通信設(shè)計(jì)和實(shí)現(xiàn)了兩款微波寬帶低噪聲放大器,兩款低噪聲放大器均采用了新穎的設(shè)計(jì)理念和方法,性能則達(dá)到了預(yù)期的設(shè)計(jì)指標(biāo),其設(shè)計(jì)實(shí)現(xiàn)過程和結(jié)果對寬帶低噪聲放大器的研究具有借鑒和參考意義。
[Abstract]:In today's information society, ubiquitous communication networks exist around us like air and become an indispensable part of modern life. In the flourishing communication technology, broadband / UWB communication technology is valued for its large capacity and high speed. In broadband / UWB communication, broadband / UWB communication has been paid more attention to. In the receiver, Low Noise Amplifier (LNA) is a key component. LNA is located at the front end of the receiver. Its performance directly determines the receiving sensitivity of the system and the noise factor of the whole machine. Therefore, the research on broadband / ultra wideband low noise amplifier is an important research in the research field of broadband communication technology. The main content of this paper is to design and implement microwave broadband / ultra wideband low noise amplifier. Firstly, the basic theory and design method of microwave broadband low noise amplifier are expounded and analyzed. The theoretical part mainly involves the transmission line theory, the noise analysis of two port networks and the noise characteristics of the transistors. In the method, the selection method of the amplifier based on the optimal source impedance of the noise, the design method of the broadband impedance matching based on the negative feedback of the gate leakage parasitic capacitance, and so on, provide the theoretical and method support for the subsequent design of the microwave broadband low noise amplifier. The third chapter of this paper is aimed at the ultra wideband (UWB) communication system, A 3.1-10.6GHz broadband low noise amplifier is designed. The amplifier uses the commercial 0.15um pHEMT process design of Taiwan maw. In the design method, the intrinsic gate leakage parasitic capacitance of the transistor is fully utilized to expand the working bandwidth of the LNA. Finally, the LNA has achieved a larger than 15dB gain and a noise coefficient of less than 1.8dB in the simulation. The fourth chapter of this paper designs and implements a 50MHz-1.8GHz HMIC ultra wideband low noise amplifier for the requirements of the ISM multiband communication system. The amplifier uses a discrete commercial ATF amplifier to design and implement the PCB board on the PCB board. A modified Kukielka amplifier structure is adopted. The test results show that the amplifier has a gain of greater than 26dB in the working frequency band and the noise coefficient less than 1.4dB, and the design goal is achieved. At the same time, the correctness of the design concept and method of the LNA is verified. This paper aims at the UWB communication system and the ISM multiband communication. Two microwave broadband low noise amplifiers are designed and implemented. All two low noise amplifiers have adopted new design concepts and methods, and their performance reaches the expected design targets. The design and implementation process and results are of reference and reference significance for the research of broadband low noise amplifier.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN722.3

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