共查询到20条相似文献,搜索用时 140 毫秒
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微屏蔽传输线的分析与计算 总被引:1,自引:0,他引:1
微屏蔽线(MSL)是一种新型的平面传输线,其超高的频率响应和极低的色散特性,可望广泛地应用于各种毫米波电路中,本文把用于鳍线、微带线的谱域导抗法推广到这种半封闭的传输线中,分析、计算了两种微屏蔽传输线的色散特性。计算结果与有关的实验相吻合,为这种半封闭的新型毫米波传输线提供了一种有效的计算方法。 相似文献
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曲兰欣 《固体电子学研究与进展》1995,(2)
用共面波导技术制成的V波段和W波段商用高性能MMIC据(lEE1994Microwave&Millimeter-waveMonolithicCircuitSymp.)报道,欧洲邮政总代理处(CEPT)已将两个频段划归交通控制部门专用。63~64GHZ... 相似文献
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本文在直线法分析共面波导传输线的基础上,针对直线法的特点,利用麦克斯韦方程组中的欧姆定律以及超导体复电导率的概念,将二流体模型引入到分析中。从而计算出具有一定厚度超导薄膜的共面波导传输线的色散特性和衰减特性。由于直线法是一种半解析半数值的方法,和其他复杂的场分析相比节省了大量的计算时间,同时保证了计算精度,避免了常用的利用表面阻抗引入超导体复电导率的准静态分析方法。并且对于导带是理想导体、有耗普通 相似文献
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航空应用的IPS模式26cm TFT-LCD具有±70°宽视角,400nits的高亮度和-30℃-70℃的宽工作温度范围。为实现以上性能采用了新的LC的材料,像素电极和公共电极处于顶层的新型共面开关TFT矩阵结构及新的黑底结构。 相似文献
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基于SDLC环的高速同步通信及其实现唐文运同步数据链路协议(SDLC)是IBM的所提出的计算机通信网中数据链路层的同步通信规程,它已由国际标准化组织认可,成为高级数据链路协议(HDLC)。在此基础上产生的环模式(SDLCLOOP),原用于IBM的36... 相似文献
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Naichang Yuan Chengli Ruan Weigan Lin 《Microwave Theory and Techniques》1994,42(5):855-859
Several new types of monolithic coplanar transmission lines, v, elliptic, and circular-shaped microshield coplanar waveguide, have been proposed. The characteristic impedance expressions for those transmission lines have been derived using the conformal mapping method (CMM) under the assumption of the pure-TEM propagation and zero dispersion. In the analyses of the elliptic and the circular-shaped microshield coplanar lines, the methods using the graphical approximation and taking the geometric mean value of the upper and the lower bounds to the size of the line are put forward to calculate the characteristic impedance of this two kinds of microshield coplanar lines. The numerical results show the effects of the different shaped microshield walls on characteristic impedances 相似文献
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光激发LT—GaAs共面微带传输线THz色散与衰减特性 总被引:2,自引:0,他引:2
彩和半经验色散公式分析了LT-GaAs衬底共面微带传输线的THz模式色散与切伦柯夫辐射损耗特性,同时计算了导体欧姆损耗和衬底介电损耗,结果表明,较小的横向尺寸有利于改善LT-GaAs共面微带传输线模式色散和辐射损耗特性。较大的横向尺寸比可降低导体欧姆损耗。 相似文献
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K. Guney C. Yildiz S. Kaya M. Turkmen 《Journal of Infrared, Millimeter and Terahertz Waves》2006,27(9):1241-1255
This article presents a new approach based on multilayered perceptron neural networks (MLPNNs) to calculate the odd-and even-mode characteristic impedances and effective permittivities of the broadside-coupled V-shaped microshield coplanar waveguides (BC-VSMCPWs). Six learning algorithms, bayesian regulation (BR), Levenberg-Marquardt (LM), quasi-Newton (QN), scaled conjugate gradient (SCG), resilient propagation (RP), and conjugate gradient of Fletcher-Powell (CGF), are used to train the MLPNNs. The neural results are in very good agreement with the results reported elsewhere. When the performances of neural models are compared with each other, the best and worst results are obtained from the MLPNNs trained by the BR and CGF algorithms, respectively. 相似文献
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High performance microshield line components 总被引:3,自引:0,他引:3
Several millimeter-wave passive components have been fabricated using the microshield transmission line geometry, and their performance is presented herein. Microshield is a quasi-planar, half-shielded design which uses a thin dielectric membrane (1.5 μm) to support the conducting lines. This approach provides a nearly homogeneous, air-filled environment and thus allows extremely broad-band TEM operation. This paper examines the conductor loss and effective dielectric constant of microshield lines and presents results on transitions to conventional coplanar waveguide, right-angle bends, different stub configurations, and lowpass and bandpass filters. Experimental data is provided along with numerical results derived from an integral equation method. The microshield line is shown to be very suitable for high performance millimeter and submillimeter-wave applications 相似文献
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有限厚度衬底非对称共面线的基本参数 总被引:1,自引:0,他引:1
本文首先利用保角变换法分析了自由空间中的非对称共面线,得到了其严格解,然后给出了任意多层有限厚度衬底非对称共面线的有效介电常数、单位长度线电容、特性阻抗和导波波长的闭合形式的解析表达式。这些分析对微波毫米波集成电路的设计有意义。 相似文献
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基于TSMC0.13μmCMOS工艺,对深亚微米硅基上的共面波导特性进行了研究。在分析中引入了保角映射等数值方法,给出了有效介电常数εeff、特征阻抗Z、单位电容C等传输线指标随几何参数变化的计算公式。并设计了特征阻抗分别为50Ω和70Ω的共面波导传输线元件库。采用Short-Open-Load-Thru(SOLT)校准测试技术对片上传输线元件库进行测试。在0.1~40GHz范围内,测试结果与数值分析解吻合。这为在硅基上进行RFIC设计提供了一个合理选取传输线结构的方法。 相似文献
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对薄膜支撑空腔型微屏蔽传输线进行分析,提出微屏蔽传输线的物理结构。为了验证微屏蔽传输线在毫米波应用的优势,利用类比平行耦合微带线滤波器的方法设计了一种4阶切比雪夫三线对称结构微屏蔽线滤波器。通过对该微屏蔽腔体结构进行HFSS仿真,得到中心频率35 GHz的宽带滤波器,带宽15 GHz,带内插损小于0.5 dB,带外抑制>40 dB@53 GHz,器件尺寸8.24 mm×1.5 mm×0.65 mm。该设计为基于平面传输线的滤波器在毫米波频段的实现提供了一种可行的方法。 相似文献
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提出了一种小型超宽低通微带滤波器的新型结构,即微带与共面波导紧耦合结构。该微带滤波器由接地板上一个共面波导谐振器与基片另一面上开槽的微带结构发生耦合,得到两极点,准椭圆函数响应滤波器,通带上限频率有一个传输零点。该结构有尺寸小、通带损耗小和群时延好等特性。 相似文献
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In this work, the coplanar waveguide is fabricated on a PES (poly[ether sulfone]) substrate for application to a flexible monolithic microwave integrated circuit, and its RF characteristics were thoroughly investigated. The quality factor of the coplanar waveguide on PES is 40.3 at a resonance frequency of 46.7 GHz. A fishbone‐type transmission line (FTTL) structure is also fabricated on the PES substrate, and its RF characteristics are investigated. The wavelength of the FTTL on PES is 5.11 mm at 20 GHz, which is 55% of the conventional coplanar waveguide on PES. Using the FTTL, an impedance transformer is fabricated on PES. The size of the impedance transformer is 0.318 mm × 0.318 mm, which is 69.2% of the size of the transformer fabricated by the conventional coplanar waveguide on PES. The impedance transformer showed return loss values better than –12.9 dB from 5 GHz to 50 GHz and an insertion loss better than –1.13 dB in the same frequency range. 相似文献