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介绍了设计Ku波段发夹型微带滤波器的基本原理,对抽头发夹线谐振器结构进行修正,并通过大量仿真计算得到其耦合系数修正曲线。描述了抽头发夹线微带滤波器的设计方法和初值计算。最后给出了Ku波段5阶发夹型带通滤波器的设计实例和测试结果。 相似文献
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根据超宽带(UWB)纳秒电磁脉冲的基本特性,采用模拟计算仿真与实验研究方法,研究了超宽带纳秒电磁脉冲信号通过微波接收机带通滤波器的时域、频域传输特性,初步认识了超宽带纳秒电磁脉冲通过带通滤波器传输特性规律,它是对传统连续波(CW)信号与脉冲调制信号通过微波带通滤波器传输特性技术的补充和完善。该研究成果为将来开发超宽带纳秒电磁脉冲在各类接收机中的应用提供技术基础。 相似文献
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将Ku波段射频信号下变频为1.25~1.75 GHz的中频信号,经26路功分器功分为26路信号,每路经过相互交叠的带通滤波器和检波器,当频率位于某个通道的滤波器内时,该通道检波器输出对应检波电压,将该检波电压与相邻通道检波电压和绝对电平进行比较,并将比较结果送入FPGA,由FPGA进行判断、编码,输出对应的频率编码、同时到达信号,准备好指示等。 相似文献
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为适应越来越密集的微波频段信号环境及小型化的发展要求,利用高低通滤波器级联的方式实现带通滤波器的设计与优化,介绍了一个2~18 GHz超宽带带通滤波器,并给出了测试结果。 相似文献
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为了掌握微波滤波器的制作原理及设计方法,实现一种UHF波段带通滤波器的设计和制作。该设计采用了既定指标确定滤波器的形式(椭圆函数LC带通滤波器),以椭圆函数为理论基础,通过软件仿真、版图制作、加工,并通过矢量网络分析仪进行调试、测试,从而制作成功满足指标的UHF波段带通滤波器。要设计一个滤波器,首先要分析滤波器的技术指标,选择合适的滤波器形式,确定滤波器的级数,分析滤波器的带外特性以及通带特性,估算滤波器中心衰减和带外抑制的大小,对滤波器进行合理的设计与计算,最后要对滤波器进行仿真优化,直至达到满意的技术指标。 相似文献
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A design of current-mode continuous-time filters for low voltage and high frequency applications using complementary bipolar current mirror pairs is presented. The proposed current-mode filters consist of simple bipolar current mirrors and capacitors and are quite suitable for monolithic integration. Since the filters are based on the integrator type of realization, the proposed method can be used for a wide range of applications. The frequency of the filters can easily be changed by the DC controlling current. A fifth-order Butterworth and a third-order leapfrog filter with tunable cutoff frequencies from 20 MHz to 100 MHz are designed as examples and simulated by SPICE using standard bipolar parameters. 相似文献
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Celestino A. Corral 《Analog Integrated Circuits and Signal Processing》2005,42(2):147-159
The inverse ultraspherical filter is derived and its properties analyzed. It is shown that the inverse ultraspherical filter has smaller transition band than the inverse Chebyshev filter under certain circumstances while still maintaining the maximally flat passband characteristic. Filter pole and zero calculations are described and typical magnitude and delay responses generated. Nomographs of inverse ultraspherical filters are also provided for determining filter order and for possible magnitude response optimization.Celestino A. Corral was born in Havana, Cuba. He earned his Bachelors, Masters and Ph.D. degrees in electrical engineering from the University of Miami, Florida, in 1985, 1987, and 1993, respectively. He completed his Ph.D. program under a Patricia Roberts Harris fellowship. From 1988 to 1990 Dr. Corral was a Member of the Technical Staff at Sandia National Laboratories, Albuquerque, New Mexico, where he was involved in the analysis, modeling, and design of custom circuits for piezoelectric sensor components. In 1994, he joined Scientific-Atlanta in Atlanta, Georgia, as an Associate Staff RF Engineer and worked on communication systems and specialized microwave software. In 1997 he was Senior Design Engineer at Origin Data Systems in Boca Raton, Florida, where he had multiple roles in system, hardware, and software development for a novel asset management/RFID system. Currently, Dr. Corral is a Distinguished Member of the Technical Staff in Motorola Labs, Plantation, Florida, and is involved in ultra-wideband, wideband, and propagation research. His interests include circuit and filter theory, communication systems, numerical analysis, signal processing, and constrained optimization. He has published over twenty-five journal and conference papers, has six patents filed, and two trade secrets.Dr. Corral was principal recipient of the Myril B. Reed Best Paper Award for the 40th Midwest Symposium on Circuits and Systems in 1997. Dr. Corral is also the principal recipient of the Ambrose Fleming Premium for IEE Proceedings on Circuits, Devices, and Systems, 2000. Dr. Corral is a Senior Member of IEEE and a member of Omicron Delta Kappa, Tau Beta Pi, and Eta Kappa Nu honor societies. 相似文献
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介绍了采用三维微波电磁场仿真软件快速提取直接耦合波导带通滤波器耦合窗口参数的方法,并提出了优化最终模型的快速扫描技术.全波仿真及实验结果表明,该方法能满足波导带通滤波器快速精确设计的要求. 相似文献
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A directional filter has a passband extending fully along a straight line passing through the origin. In its original form the transformation technique, a powerful tool for designing two-dimensional FIR filters, is not useful to design such a filter. In this communication we suggest a few analytical and optimisation-based methods to design directional filters using the transformation technique. The superiority of the proposed methods over existing techniques is demonstrated. 相似文献
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一种基于CIC滤波器的有效锐化方法研究 总被引:2,自引:0,他引:2
介绍了对积分梳状滤波器(CIC滤波器)的有效锐化。所提出的锐化滤波器的结构由两个主要部分组成:一个梳状滤波器的级联部分和一个锐化滤波器部分。所提出的方案使得滤波器中锐化部分的工作速率比输入速率大为降低,其频谱响应特性比传统的也有所改进。通过MATLAB仿真,可看出改进锐化后的滤波器性能更优。 相似文献
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Design techniques for a new class of integrated monolithic high-permittivity ceramic waveguide filters are presented. These filters enable a size reduction of 50% compared to air-filled transverse electromagnetic filters with the same unloaded Q-factor. Designs for Chebyshev and asymmetric generalised Chebyshev filter and a diplexer are presented with experimental results for an 1800 MHz Chebyshev filter and a 1700 MHz generalised Chebyshev filter showing excellent agreement with theory. 相似文献
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本文介绍了在数字下变频(DDC)中的抽取滤波器系统设计方法和具体实现方案。采用CIC滤波器、HB滤波器、FIR滤波器三级级联的方式来降低采样率。通过实际验证,证明了设计的可行性。 相似文献
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Hyun-Lark Do Byung-Woon Choi Bong-Hwan Kwon 《International Journal of Electronics》2013,100(7):385-405
Single-stage line-coupled ac/dc converter with high power factor and ripple-free input current is proposed. The proposed power factor correction circuit can achieve high power factor and ripple-free input current using a coupled inductor. Experimental results for a 400?W converter at a constant switching frequency of 100?kHz are obtained to show the performance of the proposed converter. 相似文献