ADS设计的0.6 ~ 5.5 ghz E-PHEMT宽带高增益LNA

Jun Tang, Zhaowen Yan, Nan Wang
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引用次数: 1

摘要

设计并仿真了一种带宽为0.6 ~ 5.5 ghz、增益大于27dB、平坦度波动在±2dB、噪声系数小于1.2dB、输入输出反射系数小于−10dB的超宽带(UWB)低噪声放大器(LNA)。该LNA利用源极的串联负反馈和漏极与栅极之间的并联负反馈来补偿高频增益的降低。与传统的漏极与栅极间电感负反馈相比,这种加阻串联电容反馈能明显改善增益平坦度,并能明显扩大带宽。此外,本设计采用两级级联技术实现高增益,采用TL29传输线实现输入输出端口的宽带匹配。仿真结果与版图图吻合良好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A 0.6–5.5GHz E-PHEMT broadband high-gain LNA designed by ADS
An ultra-wide band(UWB) low noise amplifier (LNA) of bandwidth 0.6–5.5GHz, gain more than 27dB, flatness fluctuating in ±2dB, noise-figure less than 1.2dB and the input and output reflection coefficient is less than −10dB within the range of the bandwidth is designed and simulated. This LNA utilizes both series negative-feedback in the source electrode and parallel negative-feedback between the drain electrode and the gate electrode to compensate the decrease of the high frequency gain. Comparing with traditional inductance negative-feedback between the drain electrode and the gate electrode, this adding resistance series capacitance feedback can improve gain-flatness and expand bandwidth obviously. Furthermore, this design adopt two stage cascade technology to achieve high gain and a transmission line of TL29 is used to achieve broadband match of an input and output port. Simulated in schematic and layout results are in excellent agreement.
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