合肥博仑微波器件有限公司北大核心CSCD

合肥博仑微波器件有限公司是一家民营高科技企业,成立于1997年。专业设计和制造微波滤波器、频率源部件等系列产品。目前,博仑公司设计生产的滤波器品种,按功能分类有:低通滤波器、高通滤波器、带通滤波器、带阻滤波器等;按结构分类有:LC滤波器、腔体滤波器、介质滤波器、波导滤波器、管状滤波器、螺旋滤波器等。     

合肥博仑微波器件有限公司

合肥博仑微波器件有限公司是一家民营高科技企业,成立于1997年。专业设计和制造微波滤波器、频率源部件等系列产品。目前,博仑公司设计生产的滤波器品种,按功能分类有:低通滤波器、高通滤波器、带通滤波器、带阻滤波器等;按结构分类有:LC滤波器、腔体滤波器、介质滤波器、波导滤波器、管状滤波器、螺旋滤波器等。其它无源产品有     

滤波器的发展与展望

文章对各类滤波器的产生和发展过程作了介绍，内容涉及模拟滤波器、数字滤波器、无源滤波器、有源滤波器、线性滤波器、非线性滤波器和卡尔曼滤波器以及开关电容滤波器，对这些滤波器的应用特点进行了比较。     

电调微波带通滤波器的研究进展

电调滤波器是当前微波滤波器的研究热点,它们取代滤波器组可减小整机体积和降低设计复杂度。本文从电调滤波器的分类着手,分别综述变容管电调滤波器、铁电薄膜电调滤波器、微机电系统(MEMS)电调滤波器和压电换能器电调滤波器的结构和性能,并分析各自的特点。最后,提出电调滤波器的发展趋势。     

一种类正余弦CIC滤波器

传统CIC滤波器由于其实现不需要乘法器和存储器,因此已在各种变采样率系统中得到了广泛的应用。但是传统CIC滤波器的通带失真较大,阻带衰减较小,而且其积分器工作在高采样率端,这很大程度限制了它在对性能要求较高的变采样率系统中的应用。而后来提出的各种CIC滤波器,如锐化CIC滤波器、ISOP-CIC滤波器和CIC-Cosine滤波器等,或者只改善通带特性,或者只改善阻带特性,或者积分器运行在高采样率端。本文在分析对比了传统的CIC滤波器、锐化CIC滤波器、ISOP-CIC滤波器和CIC-Cosine滤波器的频率特性的基础上,引入一种类余弦预滤波器和一种类正弦预滤波器,再加上多级级联的传统CIC滤波器,构成一种多级结构的类正余弦CIC滤波器。所引入的类正弦预滤波器和类余弦预滤波器分别用于减小CIC滤波器的通带失真和增大其阻带衰减。仿真结果表明,所提出的类正余弦CIC滤波器比传统的CIC滤波器、ISOP-CIC滤波器、CIC-Cosine滤波器都具有更小的通带失真和更大的阻带衰减。同时所引入的两级预滤波器工作在低采样率端,并且通过使用多相分解技术同样可使多级级联的CIC滤波器工作于低采样率端。      

一种UHF带通滤波器的设计

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。     

基于Matlab的巴特沃斯滤波器设计

为了得到较纯净的真实信号,对巴特沃斯模拟滤波器的幅频特性、设计方法及设计步骤进行了研究,利用Matlab程序,设计了巴特沃斯模拟滤波器,给出了Matlab设计程序,并分析了巴特沃斯模拟滤波器的幅频特性.利用Matlab程序绘制了巴特沃斯模拟滤波器的幅频特性曲线,并利用Matlab实现了模拟滤波器原型到模拟低通、高通、带通、带阻滤波器的转换.由模拟滤波器原型设计模拟高通滤波器的实例说明了滤波器频率转换效果.     

电源线滤波器与电磁干扰

文章主要从电源线滤波器的基本原理阐述了电源线滤波器对电磁干扰的抑制作用.并且详细阐述了使用电源线滤波器时应考虑的主要参数、体积大小的影响因素、实际滤波器与理想滤波器的区别,以及电源线滤波器的正确安装.     

基于MEMS技术的微波滤波器研究进展

基于MEMS技术的滤波器是现行RF结构中一个关键的MEMS器件。与传统的采用金属矩形或圆柱波导以及半导体元件制作的滤波器相比,MEMS滤波器具有低损耗、高隔离度、线性好、体积小、易于集成等优点。对利用MEMS技术制作的滤波器做了分类总结,综述了近几年MEMS滤波器的研究进展,包括硅体微加工滤波器、LIGA传输线型滤波器和基于MEMS开关/电容实现的可调滤波器。指出可调滤波器的开发适应微波、毫米波波段的多频段、宽带无线通信系统的迫切需要,具有重要的现实意义。     

基于Matlab的无失真模拟滤波器设计

介绍用Matlab设计出一个由低通、带阻、相移滤波器构成的无失真模拟滤波器方法.分别给出各个滤波器的设计过程、仿真结果、实际电路图,并在最后给出了经过无失真滤波器后输出信号的眼图.眼图结果表明,无失真滤波器的幅频、相频特性良好.说明用Matlab设计模拟滤波器简单、方便、有效,是一个在滤波器设计方面很有力的工具.     

体声波滤波器自动布局工具的设计开发

为了实现体声波（BAW）滤波器版图的自动排布和构建滤波器的三维模型,开发了一款体声波滤波器自动布局工具。根据文献提出的BAW梯形滤波器布局设计流程,基于.NET平台,使用C#语言,创建生成滤波器版图的功能界面。根据输入的薄膜体声波谐振器(FBAR)个数和面积大小生成对应的多边形外接圆,通过FBARs的串并联连接情况,生成放置外接圆的位置,并生成多边形。生成多边形后,用户只需对其进行微调(拖动、旋转等),即可在保证滤波器性能的情况下,得到面积尽可能小的版图。在所完成的滤波器版图基础上,根据滤波器的结构参数和建模方式, 在AutoCAD中导入写好的动态链接库,创建生成滤波器三维模型的功能界面。输入FBAR膜层厚度等参数后,软件自动生成滤波器的三维模型。并自动保存为可导入电磁仿真软件的dwg文件或sat文件,方便滤波器的电磁仿真。设计开发过程中所用滤波器的结构参数等即为该文验证所设计软件的案例。证明了所开发软件的可行性。即软件在保证滤波器性能的情况下,最大限度地缩小版图面积,提高滤波器在晶圆上的面积利用率,且节省了滤波器设计人员的时间和精力。     

Low sensitivity complex image rejection filter for GNSS receivers

In this paper, a new approach for the design of a low sensitivity complex-filter is proposed. The approach is based on realising the filter using low sensitivity allpass sections. The complex filter obtained can be used as image-reject filter in low-IF GNSS receivers. The filter configuration is modular, i.e. is composed of the same subcircuits which simplifies the design of the circuit. A Chebyshev type OTA-C image-reject filter obtained by cascading two third-order allpass-based complex filters is presented. Post layout simulation results of the filter using SPECTRE in CADENCE design tool verifying its proper operation are provided.     

Ka频段陶瓷基板微带带通滤波器设计分析

为满足微波电路小型化的发展要求,基于陶瓷基板设计了一款Ka频段的微带带通滤波器。分析了滤波器的电路设计原理及工艺设计方案,采用电路优化和三维全波仿真结合的方法对电路进行仿真。在优化后的版图基础上,通过改善膜层附着力、提高加工精度等方式对滤波器的加工进行控制。测试结果满足使用要求,证明了电路及工艺设计方案的正确性。     

Standard cell layout with regular contact placement

The practicability and methodology of applying regularly placed contacts on layout design of standard cells are studied. The regular placement enables more effective use of resolution enhancement technologies, which in turn allows for a reduction of critical dimensions. Although placing contacts on a grid adds restrictions during cell layout, overall circuit area can be made smaller by a careful selection of the grid pitch, allowing slight contact offset, applying double exposure, and shrinking the minimum size and pitch. The contact level of 250 nm standard cells was shrunk by 10%, resulting in an area change ranging from -20% to +25% with an average decrease of 5% for the 84 cells studied. The areas of two circuits, a finite-impulse-response (FIR) filter and an add-compare-select (ACS) unit in the Viterbi decoder, decrease by 4% and 2%, respectively.     

The design and evaluation of a generic method for generating mosaicked multispectral filter arrays.

The technology of color filter arrays (CFA) has been widely used in the digital camera industry since it provides several advantages like low cost, exact registration, and strong robustness. The same motivations also drive the design of multispectral filter arrays (MSFA), in which more than three spectral bands are used. Although considerable research has been reported to optimally reconstruct the full-color image using various demosaicking algorithms, studies on the intrinsic properties of these filter arrays as well as the underlying design principles have been very limited. Given a set of representative spectral bands, the design of an MSFA involves two issues: the selection of tessellation mechanisms and the arrangement/layout of different spectral bands. We develop a generic MSFA generation method starting from a checkerboard pattern. We show, through case studies, that most of the CFAs currently used by the industry can be derived as special cases of MSFAs generated using the generic algorithm. The performance of different MSFAs are evaluated based on their intrinsic properties, namely, the spatial uniformity and the spectral consistency. We design two metrics, static coefficient and consistency coefficient, to measure these two parameters, respectively. The experimental results demonstrate that the generic algorithm can generate optimal or near-optimal MSFAs in both the rectangular and the hexagonal domains.     

A Method of Synthesizing Microwave Bandpass Filters Constructed With Symmetrical or Asymmetrical Compact Microstrip Resonators

This paper presents a method of synthesizing microwave filters consisting of compact microstrip resonators (CMRs). The synthesizing method is based on the conventional insertion-loss design method and can be applied to the design of filters consisting of symmetrical and asymmetrical CMRs. The synthesizing method can help the designer to determine the appropriate layout according to the specified passband and stopband characteristics of the filter. A new type of CMR layout is proposed to suppress the spurious passband response and is applied to the implementation of a Ku-band filter. The measurement of the prototype shows approximately 1.5-dB insertion loss in the passband and a rejection greater than 40 dB at the specified frequencies. Besides, an asymmetrical CMRs filter operated at Ku-band was also designed and fabricated. The measurement result is also close to the computer simulation result. This demonstrates the effectiveness of the proposed design concept     

Millimeter-wave Micromachined Filter Design by Artificial Neural Network Modeling Technique

This paper presents a design approach for a 34 GHz λ/2 resonator micormachined bandpass filter by using the artificial neural network (ANN) modeling technique. Three important dimensions of the filter layout are used to capture critical input-output relationships in the ANN model. Once fully developed, the ANN model has been shown to be as accurate as an EM simulator and much more efficient computationally in the design optimization of the filter.     

基于ADS的平行耦合微带线带通滤波器的设计及优化

介绍一种借助ADS(Advanced Design System)软件进行设计和优化平行耦合微带线带通滤波器的方法,给出了清晰的设计步骤,最后结合设计方法利用ADS给出一个中心频率为2.6 GHz,带宽为200 MHz的微带带通滤波器的设计及优化实例和仿真结果,并进一步给出电路版图Momentum仿真结果.仿真结果表明:这种方法是可行的,满足设计的要求.     

Optimal components selection for active filter design with average differential evolution algorithm

Component selection in electronic circuit design is an important issue to achieve a targeted performance and quality level. Particularly in filter circuits, changes in gain and phase response of the circuit are directly dependent on the component values of the filter. Therefore, the selection of component values must be done carefully. In this article, a differential evolution (DE) algorithm with a new mutation strategy, named as average DE (ADE), is introduced for analog active filter design. The ADE algorithm minimizes the total design error of the state variable filter (SVF) for the optimal selection of component values. Simulation results indicate that the proposed algorithm reduces the design error when compared to other methods.     

基于平衡技术的微带低通滤波器版图优化设计

微带线结构的不连续性,使反射损耗和插入损耗较大,影响滤波器性能。利用平衡法提升滤波器并联分支中较低的特性阻抗,达到降低微带线宽度的目的,从而均衡整个滤波器的宽度,使版图仿真优化。以一个5阶切比雪夫微带低通滤波器设计为例,仿真结果表明,滤波器通带内反射损耗从-9.566dB降低到-15.837dB,插入损耗从0.679dB降低到0.322dB,与直接采用Richards变换和Kuroda规则设计微带低通滤波器相比,该方法能缩短滤波器设计周期,获得满意的滤波器性能。