| GPS低噪声放大器的设计与制作 |
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| 引用本文： | 刘坤,金秀梅,李民权.GPS低噪声放大器的设计与制作[J].工业控制计算机,2010,23(3):106-108. |
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| 作者姓名： | 刘坤 金秀梅 李民权 |
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| 作者单位： | 安徽大学计算智能与信号处理教育部重点实验室,安徽,合肥,230039 |
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| 摘 要： | 利用仿真软件ADS，设计仿真了一个GPS的1575MHz频段的低噪声放大器，选用ATF-34143FET作为两级级联结构电路的放大器件，用微带线作为传输线，应用于GPS的天线接收系统中。首先设计稳定电路解决场效应管的稳定问题，然后重点进行匹配电路的设计，最后包括电源电路在内构成一个完整的低噪声放大器电路。制作实物，并进行调试，最后测试结果：增益30．5dB，噪声系数0．7dB，输入输出驻波比优于1．4，增益平坦度带内每5MHz小于0．2dB，1dB压缩点11dBm。
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| 关 键 词： | LNA ADS 驻波比 增益 噪声系数 |
Design and Manufacture of GPS's Low Noise Amplifier |
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| Abstract: | A low noise amplifier is simulated and designed by the simulation software ADS in 1575MHz＇s frequency band of GPS. ATF-34143FET is selected as the amplier of two levels stacked circuit,as the transmission line with microstrip line,it is mainly uesd in GPS-antenna systems.At first,a stability of the circuit is designed to solve the stability of FET,and then focus on the design of matching circuit and finally included the power supply circuit,composed a complete low-noise amplifier circuit, make physical and debugging,final test results：the gain is 30.5dB and noise figure is 0.7dB.Input and output VSWR〈1.4,Gain flatness is less than 0.2dB each 5MHz in band,ldB compression is 11dBm. |
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| Keywords: | LNA ADS |
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