新型3.1～6GHz高增益超宽带低噪声放大器  

A Novel 3.1～6 GHz Ultra-wideband Low Noise Amplifier With High Gain

作　　者：沈珮[1] 张万荣 金冬月[1] 谢红云[1] 尤云霞[1] 孙博韬[1] 肖盈[1] 

机构地区：[1]北京工业大学电子信息与控制工程学院,北京100124

出　　处：《北京工业大学学报》2010年第9期1181-1185,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金项目(60776051;60376033);北京市自然科学基金项目(4082007);北京市教委科技发展计划项目(KM200710005015;KM200910005001);北京人才强教深化计划--服务北京创新人才培养项目(0020005412A001);北京市优秀跨世纪人才基金项目(67002013200301);北京工业大学第八届研究生科技基金

摘　　要：在传统的窄带达林顿结构放大器基础上,提出一种新型高增益超宽带达林顿结构低噪声放大器.该放大器采用高频低噪声晶体管,采用电感补偿技术和正实电阻补偿技术,保持了达林顿放大器高增益的优点,而且也取得了低噪声、良好输入输出匹配和宽带稳定性.通过优化设计,新型放大器在3.1～6 GHz内,增益S21高达21 dB,变化不超过0.3 dB,噪声系数F为1.5～2.1 dB,输入输出反射系数S11和S22都小于-14 dB,在宽带内保持稳定.A novel uhra-wideband （UWB） low noise and high gain Darlington amplifier is presented based on the traditional narrow-band Darlington amplifier. In the new amplifier, the high-frequency transistors, and the compensation techniques of inductor and positive real resistance are adopted to keep the advantage of high gain of Darlington amplifier, and to achieve low noise, good input and output match, and good wideband stability. The simulation results show that the new amplifier has high gain of 21 dB with variation less than 0.3 dB, low noise figure from 1.5 to 2. 1 dB, matched input and output reflections （S11 , S22） less than - 14 dB, and good stability in the frequency range from 3.1 to 6 GHz.

关 键 词：低噪声放大器 超宽带 达林顿对 电流增益 

分 类 号：TN722.3[电子电信—电路与系统]