0.92.5ghz寬帶cmos低噪聲放大器研究與設(shè)計_第1頁
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1、華中科技大學(xué)碩士學(xué)位論文0.9-2.5GHz寬帶CMOS低噪聲放大器研究與設(shè)計姓名:馬世璽申請學(xué)位級別:碩士專業(yè):軟件工程指導(dǎo)教師:張科峰20090525華 中 科 技 大 學(xué) 碩 士 學(xué) 位 論 文 華 中 科 技 大 學(xué) 碩 士 學(xué) 位 論 文 Abstract Now the development of the Wireless communications is forward to Multi-standard and wi

2、deband. In order to make the wireless communication systems can work in a wideband frequency, the RF front end of the wireless equipment must have the ability to wok beyond a very wide frequency rangy. The Low noise ampl

3、ifier (LNA) is the first stage of the wireless receiver, so it is very important for the whole performance of the receiver, except for the whole noise and Sensitivity. Because of CMOS is easy to integrated and the techno

4、logy is very popular, it is very important to researcher the CMOS wideband low noise amplifier. After researching the basic theories of the wideband LNA and the way of realization the wideband LNA, This paper design a w

5、ide low noise amplifier working through the 0.9GHz-2.5GHz frequency range.This thesis describes the basic theories of CMOS RF designing and the popular components and its characters. This paper also analyzes the theory a

6、nd model of the noise, and then simulates the characters of the MOS noise modle. Then from the parameters of LNA, no ideal of the LNA is discussed. This paper also designs two order butterworth filter as macth net. The d

7、ifficulties in designing a wideband LNA and get the ways of how to resolves it. After that the ways of commonly design wideband LNA is studied such as distributed amplifier and resistor feedback amplifier, and compare th

8、e advantage and disadvantage of these scheme. After that design the input match net with Butterworth filter and the other module of the wideband LNA is studied and designed. Finally, the Wideband LNA is designed under S

9、MIC 0.18um RF CMOS process. After simulation with the Cadence Specter RF, simulation results show that through the full frequency band of 0.9-2.5GHz, the NF is less than 2.7dB, and the power gain is upper than 17dB. Thro

10、ugh the whole band, the Δ gain is less than 2dB. The input and output impedance matching is good too, and is less than -10dBm. The and 11 S 22 S 1dB P 3 IIP is -5.4dBm and 1.3dBm, so this designed wideband LNA has a go

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