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Search Results: 1 - 10 of 83639 matches for " 高葆新 "
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多层结构的光子带隙特性
庞云波,
电子学报 , 2002,
Abstract: 文中提出了一种具有光子带隙特性的多层结构,由方形金属构成的周期阵列位于介质衬底的正中.此结构与传统的微带电路完全兼容,制作时无需在介质衬底中打孔,同时保持了接地地板的完整性.文中比较了阵列平面处于不同位置时的带隙特性,然后通过改变阵列形式来改善带隙特性.文章的最后说明了该结构的一种应用方式.
Device Model Parameters for 2.5-10Gb/s HEMT Modulator Driver IC
2.5—10Gb/s光发射机驱动电路HEMT IC中器件模型参数

建军,,吴德馨
半导体学报 , 2001,
Abstract: 对高速调制器驱动电路 HEMT IC中器件参数进行了研究 ,着重讨论了 HEMT器件直流参数、交流参数对外调制驱动电路特性的影响 ,给出了满足电路性能要求的器件参数范围 ;对 2 .5— 10 Gb/ s PHEMT IC光驱动电路进行了计算机仿真 ,眼图模拟结果表明满足 2 .5— 10 Gb/ s高速光纤通信系统需要
CDMA-800MHz频段低温低驻波比放大电路设计
高飞,张晓平,曹必松,
电子学报 , 2005,
Abstract: 为用HEMT晶体管设计L波段低驻波比放大电路,本文用输入无源复反射系数在输出反射平面上的共轭匹配区表达式,将驻波比约束转化为无源匹配区域的映射.同时为了计算放大电路低温下噪声,通过有损输入模型导出了噪声的温度关系式.实测CDMA-830MHz高温超导前端放大器噪声温度小于30K,输入驻波比小于1.3,输出驻波比小于1.8,增益大于17dB.
NOISE PERFORMANCE PREDICTION FOR SINGLE-MODE SEMICONDUCTOR LASER DIODE
单模半导体激光器噪声特性预测

Gao Jianjun,Gao Baoxin,Liang Chunguang,
建军
,,梁春广

电子与信息学报 , 1998,
Abstract: A noise network model of single-mode semiconductor laser diode is established based on the Harder LD small signal noise model and straightforward calculation of rate equation in the TMS software. The characteristics of frequency response and noise are analyzed by using the presented model.
EQUIVALENT CIRCUIT MODEL OF METAL-SEMICONDUCTOR-METAL PHOTODIODE
一个金属-半导体-金属光电探测器等效电路模型

Gao Jianjun,Gao Baoxin,Liang Chunguang,
建军
,,梁春广

电子与信息学报 , 1999,
Abstract: An MSM photodiode equivalent circuit model based on external microwave port characters are presented in this paper, while the parameters of DC and capacitance model preserve the physical meaning. The circuit simulation results are agree with experimental results.
MEMS Class E Amplifier
MEMSE类放大器

顾洪明,吕苗,梁春广,
半导体学报 , 2003,
Abstract: A class E amplifier can be constructed using either bipolar transistor or MEMS switch.Because of the intrinsic properties of MEMS switch,the amplifier may easily get high efficiency and high power gain.This concept is demonstrated by prototype design and measurement.The measured results show that the mechanical amplifier can act as the active amplifier,with the amplifier efficiency agrees well with the simulation result,and the amplifier power gain tested as high as 2000.
ANALYSIS OF THE SUBHARMONIC LOAD PULL CHARACTERISTIC OF THE MESFET POWER AMPLIFIER PRECISELY WITH THE VOLTERRA SERIES METHOD
用VOLTERRA 级数精确分析 MESFET 功率放大器的副谐波负载牵引特性

Wang Bo,Hong Xingnan,Gao Baoxin,Pang Yunbo,
王波
,洪兴楠,,庞云波

电子与信息学报 , 2002,
Abstract: In order to analyze the subharmonic load pull characteristic of the MESPET power amplifier driven by CDMA type wide band signal, a set of Volterra transfer funcion expressions arc deducted with the MESFET nonlinear model. With these expressions, the relation between the IM3 (third order intermodulation) and the subharmonic impedance is established, and the characteristic of the subharmonic load pull is analyzed. The expression of the optimal subharmonic load is also given with the analysis. It is proved in the paper that the reactance part of the subharmonic impedance is the main factor that leads to the difference of the two IM3. The result of the analysis agrees well with the simulation result got from ADS with harmonic balance method.
用香料抑制黄曲霉毒素的产生

食品科学 , 1981,
Abstract: ?本文研究了在米粉玉米浆(rc)培养基中的黑胡椒、肉桂、薄荷、小茴香、生姜和丁香对黄曲霉(aspergillusflavus)生长和产生黄曲霉毒素的作用。经鉴定,前5种香料能抑制黄曲霉毒素的产生,而不能抑制菌丝的生长。浓度在0.1%以上的丁香则既能完全抑制
食品防腐剂的使用及其作用原理

食品科学 , 1981,
Abstract: ?加在食品中能防止或延缓食品腐败的化学物质称为化学防腐剂。本文将简要介绍国内外常用的食品防腐剂及其作用原理。苯甲酸和苯甲酸钠苯甲酸(c6h5cooh)和苯甲酸钠(c7-h5nao2)是最早使用的化学防腐剂之一,至
节点文献食物链中残留毒物的循环

食品科学 , 1980,
Abstract: ??<正>为使城市空气更加清新和寻找更好的途径来处理各种废渣废液,美国现正进行净化江河湖泊工作。在这些方面虽然已作出一定的努力,但还存在着影响食品安全与卫生的问题。
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