【摘要】 报道了一种可直接应用于无线接收系统前端的具有较低噪声系数和较高相关增益的MMIC低噪声放大器,该低噪声放大器采用0.50μm GaAs PHEMT工艺技术制作.电路设计采用两级级联结构,为减小电路面积采用集总参数元件匹配电路,并用ADS软件仿真无源元件寄生效应.电路测试结果表明:在2.8～3.5GHz频段内噪声系数低于1.4dB,同时相关增益大于25dB,增益平坦度小于0.5dB,输入输出反射损耗小于-10dB.更多还原

【Abstract】 The paper presents a MMIC low noise amplifier with low noise figure and high associate gain which can be used in wireless receiver end directly.The amplifier was fabricated using a standard 0.50 μm GaAs PHEMT technology.The two stage monolithic circuit employs lumped elements for the matching circuit to reduce the chip size.To consider parasitic effects,the circuit simulation is achieved by using ADS software.The test results demonstrated a maximum noise figure of 1.4 dB,an associated gain of more than 25 dB and gain flatness less than 0.5 dB from 2.8 to3.5 GHz.更多还原