共查询到18条相似文献,搜索用时 93 毫秒
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根据静磁表面波的基本理论建立了静磁表面波带通滤波器的设计模型 ,以实用化的静磁表面波带通滤波器为目标 ,重点考虑了静磁表面波带通滤波器的中心频率与带宽控制问题 .依据模型对滤波器进行了设计、制作和测试 .实际制作的滤波器性能指标为 :中心频率调谐范围为 4 .2~ 5 .2GHz、3dB带宽 180MHz± 6MHz、插损 11dB左右、带外抑制大于 30dB ,与理论设计结果基本一致 ,从而得到了实用化静磁表面波静磁波带通滤波器的原形 .进一步提高器件的中心调谐频率 ,在毫米波段将有广阔的发展前景 . 相似文献
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提出用REMEZ交换算法①设计声表面波滤波器,以获得最佳的的设计结果,该方法可以设计高性能声表面波滤波器.给出了理论分析,设计过程及设计公式.作为举例,设计了中心频率70 MHz,1 dB带宽为10.2 MHz,矩形系数小于1.14,波动小于±0.4 dB的高性能残余边带滤波器,其性能完全满足使用要求,证明这种设计方法是正确可靠的,是设计高性能声表面波滤波器的一种有效方法. 相似文献
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电调谐电流加权静磁波带通滤波器研究 总被引:2,自引:1,他引:1
一种新型的采用电流加权结构的静磁表面波电调谐带通滤波器已经实现,其指标为:三分贝频带宽度约40MHz(S波段),带外抑制比约35dB,电调谐范围1GHz。该器件可望在信号处理系统中得到应用。 相似文献
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本文主要介绍了一种工作于2~6GHz,3dB带宽大于200MHz的磁调谐带通滤波器的设计原理及方法,这种宽带宽的磁调谐带通滤波器利用多晶铁氧体材料制作,采用了新的耦合结构,为实现宽频带调谐,采用了与传统YIG滤波器磁路结构不同,具有不同磁场梯度的新型磁路结构设计.并通过实验验证了设计的正确性,实验结果表明该种结构设计的磁调谐带通滤波器,不仅工作频段宽,与一般的YIG带通滤波器相比具有3dB带宽,调谐方便的优点,拓展了磁调谐带通滤波器的应用. 相似文献
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使用Remez交换算法优化设计带有MSC的声表面波带通滤波器 总被引:1,自引:0,他引:1
介绍了将线性相移FIR数字滤波器的优化设计方法-Remez交换算法应用到带有多条耦合器的声表面波带通滤波器的设计中。该方法可以兼顾矩形系数、阻带抑制和带内波纹等多种因素,实现最优设计。还将两个变迹叉指换能器的同步中心选择到了带外,因而可以采用单指结构,降低了工艺要求。最后给出了一个70MHz的中频声表面波滤波器设计实例。 相似文献
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声表面波滤波器的综合设计 总被引:3,自引:0,他引:3
对常规插入损耗的声表面波滤波器的设计进行分析和综合 ,提出此类滤波器的常规设计方法 ,并对容易产生的问题进行分析 ,并提出相应的对策。给出了几种典型滤波器的设计及其结果 ,证明这些设计方法是正确可靠的 ,是设计高性能声表面波滤波器的一种有效方法。 相似文献
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In this paper, we present the design, simulation, fabrication and characterization of a terahertz(THz) filter based on metamaterial consisting of the periodical double symmetric splits ring resonator(DS-SRR) array. We can observe that the metamaterial-based filter possesses a band-pass transmission when the electrical field is along y direction, and it possesses a low-pass transmission when the electrical field is along x direction. Our results demonstrate that the proposed filter can realize the switching between band-pass effect and low-pass effect by only changing the polarization direction of the incident electromagnetic wave. Moreover, the calculated surface current distributions are also used to analyze the switchable mechanism of the THz metamatrial filter. Therefore, the proposed THz wave filter has a potential application in THz wave communication systems. 相似文献
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A systematical procedure for multilayer dielectric filter design is introduced here based on the transmission line model (TLMBCAD). By this procedure, low-pass, high-pass, and band-pass filters can be designed in the same way. The transmission line model works well and is time efficient not only for normal incidence of linearly polarized wave but also for oblique incidence wave with circular polarization. Design examples are given for low-pass and band-pass filters. Simulation results show that the method developed in this paper is valuable for the engineering design of multilayer dielectric filters. 相似文献
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A. G. Yushchenko V. V. Chizhov 《Journal of Infrared, Millimeter and Terahertz Waves》1993,14(6):1353-1366
The narrow and wide band-pass filters with high electrical parameters both in the centimeter and millimeter wave band developed in the Microwave laboratory are built on the basis of H- and E-plane inserts made of a high Q dielectric monocrystal leukosapphire (tg δ ? 6*10?6 in centimeter wave band). The filters based on the E-plane inserts have a rare spectrum of parasitic modes (up to doubled working frequency and higher) and those based on the H-plane inserts have lower insertion loss in the bandwidth. Fig.1 shows the design of a band-pass filter in which the resonators of both the first and second types are used to improve stability of amplitude-frequency characteristic in response to influence of production process and climatic factors. The electrodynamic calculation of such a filter electrical parameters is carried out according to the technique analogous to the one described in [1]. The prooedure of the band-pass filter manufacture envisages the operation of determining whether a specific dielectric element fits for pasting into the filter body. The most expedient testing method for filter elements is the electromagnetic resonance method. However, since the monocrystal leukosapphire is an anisotropic, opticallytransparent material [2], there exists a possibility of using not only the traditional SHF (Super High Frequency) method but also the method of optical testing of the quality of the dielectric element by the shape of conoscopic figures that enables to increase the output of suitable products with reduction of expenditure. A new approach to the nondestructive testing of optically-transparent filter elements using both methods and their mutual dependence in technological process, has been suggested. 相似文献
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基于Matlab GUI的模拟带通滤波器的设计 总被引:1,自引:0,他引:1
在传统的模拟带通滤波器设计过程中需要大量繁琐的数值计算,若手工计算则费时费力。在分析模拟带通滤波器设计理论和基于Matlab的图形用户界面(GUI)设计方法的基础上,利用Matlab GUI工具设计了具有通用性交互式切比雪夫模拟带通滤波器分析设计软件,并对软件中各控件回调函数的设计给出了详细的设计方法。用户只需要输入设计滤波器所需参数,然后选择相应的功能菜单,就可以得到滤波器的特性参数,并进行滤波器的性能分析。该设计解决了滤波器设计过程中大量繁琐的数值计算问题,为切比雪夫模拟带通滤波器的研究设计提供了有效的辅助工具。 相似文献
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本文设计了LGS声表面波滤波器(SAWF),介绍其结构,计算了声表面波滤波器的频率响应特性,与石英进行比较。发现LGS声表面波滤波器比石英声表面波滤波器的插入损耗要小很多,是应用于小型化中频带宽滤波器的优选材料之一。 相似文献
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Transimpedance filter is a filter which realises a transimpedance transfer function. In this article, the design methods for the transimpedance band-pass filter are presented. The circuit topologies and parameter calculation formulas of three bi-quadratic transimpedance band-pass filter topologies with low-, medium- and high-Q values are proposed, respectively. A high-order transimpedance filter can be obtained by realising a bi-quadratic transimpedance filter first and then cascaded with voltage-mode bi-quads. A high-order transimpedance filter design example is given; the simulation and the measured results verify the effectiveness of the proposed transimpedance filter design method. 相似文献