Very low noise RF nMOSFETs on plastic by substrate thinning and wafer transfer

A very low minimum noise figure (NF/sub min/) of 1.2 dB and a high associated gain of 12.8 dB at 10 GHz were measured for six-finger, 0.18-/spl mu/m radio frequency (RF) metal-oxide semiconductor field-effect transistors mounted on insulating plastic following substrate-thinning (/spl sim/30 /spl mu/m) and wafer transfer. Before this process, the devices had a slightly better RF performance of 1.1-dB NF/sub min/ and a 13.7-dB associated gain. The small RF performance degradation of the active transistors transferred to plastic shows the potential of integrating electronics onto plastic.     

毫米波辐射下悬液细胞膜电压变化研究

根据有效介质理论,用Maxwell-Wagner等效公式计算细胞悬液中的平均场．然后基于时变场中单细胞膜电压第二计算模型,用场近似等效方法,建立了毫米场辐射下悬液中细胞膜电压计算模型．模型表明悬液细胞膜电压变化和毫米波的功率、频率、细胞半径、细胞排列及细胞的浓度有关。     

一种DC-DC芯片内建可测性设计

DC-DC芯片设计中有许多内部参数需要检测和控制，有限的引脚数目使得直接测试内部参数比较困难. 文中提出一种通用性很强的内建可测性设计方法，在芯片内部设计时只需要增加规模较小的测试电路，就可以在芯片外引脚上测量芯片内部众多的参数.     

杂质非完全离化对SiC n-MOSFET电特性的影响

文章研究了SiC中杂质非完全离化对器件性能的影响.通过考虑场致离化效应,分析了空间电荷区电荷密度与表面势的关系,得出在SiC MOSFET反型条件下,可近似认为杂质完全离化.在此基础上,模拟了4H-SiC MOSFET的漏电流-栅压曲线和迁移率-栅压曲线.模拟结果与实验数据非常吻合.     

STUDY ON GIS BASED PREDICTION SYSTEM FOR RADIO WAVE PROPAGATION IN UBAN REGION

In this letter, an integrated application of the prediction for radio wave propagation with the Geographic Information System (GIS) is presented and a real prediction system based on GIS is implemented.     

Ni/Cu电极耐中压MLCC的试制

Ni/Cu电极MLCC具有高可靠性、低成本的特点,但是耐中高压性能较差.本文通过下述设计与改进后的工艺制得耐中压的Ni/Cu电极MLCC:介质叠层40层,介质层厚度为55um,在高温烧结后在40PPM的O2中再氧化3小时,制作出容量为1μF,尺寸为3035规格,温度系数是X7R特性的MLCC产品,该MLCC平均耐电压达到了950V,可以满足500V工作电压的要求.     

脉冲响应函数在Monte Carlo模拟中的应用研究

MonteCarlo方法是研究复杂面光源入射条件下光在生物组织分布规律的唯一有效手段,但直接的MonteCarlo模拟存在计算量大、收敛速度慢的问题。通过引入生物组织脉冲响应函数的概念,利用卷积方法计算光在穿过组织一定深度后的分布规律,编制了相应的程序并进行了大量计算机模拟,在此基础上,提出了一种对模拟结果进行评价的方法,利用该方法分析了光源离散量与脉冲响应函数模拟量对光场分布计算结果的影响,证明基于脉冲响应函数的MonteCarlo模拟可以极大地提高计算效率和收敛速度。     

微波电路的仿真和设计

仿真软件越来越广泛地应用于微波电路设计中。介绍了微波电路与系统仿真软件Serenade8.5的功能和应用,并以微波低通滤波器的仿直和设计为例说明了它的使用。以巴特沃斯原型滤波器为基础,首先分析了它的特性,然后对其进行优化,得到满足设计目标的低通滤波器。     

Macrophage Immunomodulation Through New Polymers that Recapitulate Functional Effects of Itaconate as a Power House of Innate Immunity

Itaconate (ITA) is an emerging powerhouse of innate immunity with therapeutic potential that is limited in its ability to be administered in a soluble form. A library of polyester materials that incorporate ITA into polymer backbones resulting in materials with inherent immunoregulatory behavior is developed. Harnessing hydrolytic degradation release from polyester backbones, ITA polymers result in the mechanism specific immunoregulatory properties on macrophage polarization in vitro. In a functional assay, the polymer-released ITA inhibits bacterial growth on acetate. Translation to an in vivo model of biomaterial associated inflammation, intraperitoneal injection of ITA polymers demonstrate a rapid resolution of inflammation in comparison to a control polymer silicone, demonstrating the value of sustained biomimetic presentation of ITA.