基于ADS的平衡式低噪声放大器设计.pdf

38 2 ( 148) V ol. 38 No. 2( Seri e 148) 2009 6 Fire Control R adarT echnology June 2009 : 1008-8652( 2009) 02-068-04 ADS 赵 霞 ( 北方民族大学 银川 750021) =平衡放大技术有着驻波特性好, 增益高易级联的优点本文 平衡放大技术应用到低噪 声放大器的设计中, 在保证低噪声和功率增益的同时, 用以提高低噪声放大器的驻波比和增益平 坦度ADS仿真结果表明, 在 513~ 613 GHz的频带范围内, 低噪声放大器绝对稳定, 噪声系数[ 11182 dB, 功率增益达到 10 dB, 并且通过采用平衡放大技术, 输入输出驻波比[ 113B 1, 带内波动 [ 1dB, 提高了低噪声放大器的有效工作带宽 : 平衡放大技术; 低噪声放大器; 驻波比; 带内波动 : TN 722. 3 : A D esign of a B alanced L ow N oise Am p lifier B a sed on AD S Zhao X ia (N orth N ationality Un iversity, Yinchuan 75002 1) Abs tract: B eing po e ed the advan tage uch a good voltage tand ing w ave ratio ( VSWR ), high gain and ea ily to be ca caded, the balanced am p lify ing technique i app lied in low no i e am plif ier ( LNA ) de ign in thi paper to mi prove VSWR and gain flatne of LNA wh ile en uring the low no i e and pow er gain. The mi u lation re u lt by u- ing ADS how that the LNA i ab olutely table w ith in the band range of 213 ~ 613GHz, and the no i e figure[ 11182dB, and pow er gain reache 10dB. By utilizing balanced am plify ing techn ique, the input and outputVSW R [ 113B1, and in-band ripp le[ 1dB, the effective operation bandw idth of the LNA i mi proved. K eyword s: balanced am p lification technique; LNA; VSW R; in-band ripple 1 , , , , , , , , , 2 , , , : ,