BDL滤波器规格书
滤波器规格书(SFSL6.5MCB)(2)
9 Vibration (振动)
The measured value shall meet Table 1(测量值满 足表 1 要求)
10
Temperature characteristics (温度特性)
≤±100ppm/℃ Reference temp. （参考温度）: +20℃
7.
Table 1(表 1) Item Limit Value (项目) (限定值) 3 dB Bandwidth ±20kHz max （3dB 带宽） 20dB Bandwidth ±30kHz max （20dB 带宽） Insertion Loss ±2.0 dB max （插入损耗） ※ Note: The limits in the above table are referenced to the initial measurements. （上表中的限定值参照初始测量值） NOTICE （注意） 1． Do not use this product with bend. The component may be damaged if excess Mechanical stress is applied to it mounted on the printed circuit board.（本产品不能折弯使用，在电路板安装时使用过 大的机械压力可能造成产品损坏。 ） 2．This specification limits the quality of the component as a single Unit Please make sure that the component is evaluated and confirmed the drawing When it is mounted to your product. （本规格书只 规定了部件本身的品质，应用于您的产品时请确认图纸该产品是否适用。 ）
直流滤波器产品手册
直流滤波器产品手册一、引言本手册旨在介绍直流滤波器产品的基本原理、特性、应用场景以及使用方法等相关信息。
通过对直流滤波器的全面讨论，读者可以深入了解直流滤波器，在实际应用中正确选择和使用该产品。
二、直流滤波器的原理2.1 直流滤波器的基本概念直流滤波器又称为低通滤波器，用于将输入信号中的直流成分滤除，只保留交流成分。
其原理是基于电容或电感的特性，通过合理的电路设计实现对直流信号的滤除。
2.2 电容滤波器1.电容滤波器的工作原理–通过电容的充电和放电过程，来滤除直流成分。
–电容滤波器的主要构成部分为电容和负载电阻。
2.电容滤波器的优点–简单、成本低。
–适用于大电流载荷。
–过载能力强。
3.电容滤波器的应用场景–直流电源滤波。
–电子设备的稳压滤波。
2.3 电感滤波器1.电感滤波器的工作原理–通过电感的感应作用，滤除直流成分。
–电感滤波器的主要构成部分为电感和负载电阻。
2.电感滤波器的优点–适用于小电流载荷。
–擅长滤除较高频率的噪声。
3.电感滤波器的应用场景–通信电源滤波。
–高频放大器的滤波。
三、直流滤波器产品的特性3.1 通频带直流滤波器的频率响应决定了其通频带范围。
产品手册中应详细标明直流滤波器的工作范围，包括最小截止频率和最大截止频率。
3.2 截止频率截止频率是指在该频率以下，直流滤波器对输入信号的衰减达到指定的范围。
产品手册中应明确指出直流滤波器的截止频率，并可以提供曲线图或表格来展示频率响应。
3.3 插入损耗插入损耗指的是直流滤波器对通过的信号造成的衰减。
产品手册中应提供插入损耗的指标，以便用户合理选择适合的直流滤波器。
3.4 阻抗特性直流滤波器的输入和输出阻抗对于其在实际应用中的匹配十分重要。
产品手册中应列明直流滤波器的输入和输出阻抗范围，并可以提供阻抗匹配的建议。
四、直流滤波器的选择与使用4.1 选择合适的直流滤波器在选择直流滤波器时，需考虑具体应用场景、所需滤波效果以及产品的特性等因素。
滤波器主要参数与特性指标
滤波器的主要参数（Definitions）：中心频率（Center Frequency）：滤波器通带的频率f0，一般取f0=（f1+f2）/2，f1、f2为带通或带阻滤波器左、右相对下降1dB或3dB边频点。
窄带滤波器常以插损最小点为中心频率计算通带带宽。
截止频率（Cutoff Frequency）：指低通滤波器的通带右边频点及高通滤波器的通带左边频点。
通常以1dB或3dB相对损耗点来标准定义。
相对损耗的参考基准为：低通以DC处插损为基准，高通则以未出现寄生阻带的足够高通带频率处插损为基准。
通带带宽（BWxdB）：指需要通过的频谱宽度，BWxdB=（f2-f1）。
f1、f2为以中心频率f0处插入损耗为基准，下降X（dB）处对应的左、右边频点。
通常用X=3、1、0.5 即BW3dB、BW1dB、BW0.5dB 表征滤波器通带带宽参数。
分数带宽（fractional bandwidth）=BW3dB/f0×100[%]，也常用来表征滤波器通带带宽。
插入损耗（Insertion Loss）：由于滤波器的引入对电路中原有信号带来的衰耗，以中心或截止频率处损耗表征，如要求全带内插损需强调。
纹波（Ripple）：指1dB或3dB带宽（截止频率）范围内，插损随频率在损耗均值曲线基础上波动的峰-峰值。
带内波动（Passband Riplpe）：通带内插入损耗随频率的变化量。
1dB带宽内的带内波动是1dB。
带内驻波比（VSWR）：衡量滤波器通带内信号是否良好匹配传输的一项重要指标。
理想匹配VSWR=1：1，失配时VSWR<1。
对于一个实际的滤波器而言，满足VSWR<1 BWdBBWdBdiv>在入射波和反射波相位相同的地方，电压振幅相加为最大电压振幅Vmax ，形成波腹；在入射波和反射波相位相反的地方电压振幅相减为最小电压振幅Vmin ，形成波节。
其它各点的振幅值则介于波腹与波节之间。
Skyworks Solutions Inc. 高性能陶瓷带通滤波器数据手册说明书
Introduction and Applications for Ceramic Band Pass FiltersDATA SHEETFeaturesGHigh Q ceramic G RuggedG Temperature compensated G Custom designsBenefitsGLow insertion loss G Small compact design G Frequency stability G MechanicalstabilityIntroductionTrans-Tech Inc.,a wholly-owned subsidiary of Skyworks Solutions Inc.,is a world-class supplier of high performance ceramic band pass filters.Specializing in band pass,notch and diplexing applications,Trans-Tech can cover a frequency range from 300MHz to 6000MHz with surface mount or connectorized devices.Utilizing state of the art assembly automation,Trans-Tech provides cost-effective solutions meeting high performance specifications.Trans-Tech surface mount PCB configured filters are designed to comply with “green”manufacturing initiatives eliminating heavy metal elements.This configuration is designed to comply with pending European regulations regarding the elimination of lead in electronic assemblies.Custom assemblies can be obtained with flat pack style SMT devices,through-hole or Sn/Pb coated PCB surface mount designs.Trans-Tech assembly methodology offers a wide array of designs,from 2mm x 2pole –8mm x 10pole band pass filters and diplexers,to advanced band stop (notch)designs and high-pass or low-pass filters.For typical applications and ranges of prod-ucts,refer to the Standard Filters/Duplexers listing included in this document.Detailed specifications,both mechanical andelectrical,are maintained for many popular designs on our Web site,or by contacting your local sales representative.The nature of applications utilizing a band pass filter,duplexer or notch filter,necessitates the close interaction of the customer and Trans-Tech application engineering.Our application engi-neers employ the latest in simulation and circuit analysis software with accurately defined design rules to provide rapid turnaround on new filter designs.With our experience and design aids,Trans-Tech can provide the necessary support for your application from prototype through production.In addition to the personal attention,Trans-Tech offers a computer-aideddesign tool,CRaFT,to assist engineers designing filters (the latest version can be downloaded from our Web site,.The strength of Trans-Tech designs begin with our ability to produce our own coaxial resonators from proprietary ceramic formulations.These resonators provide a high Q element that allows us to maintain our low filter insertion loss values.With numerous design package styles,Trans-Tech offers aggressive leadtimes on both prototype and volume applications.DATA SHEET •INTRODUCTION AND APPLICATIONS FOR CERAMIC BAND PASS FILTERSCenter frequency 300MHz to 6GHzStandard filter type Ceramic band pass,duplexer,notch,LPF Number of poles 2–10Resonator sizes 2,3,4,6,8and 12Bandwidth 1.0%–10%(May vary depending on resonator size,F O &εR )Insertion loss 1–4dB typical by design Attenuation Varies by number of poles Impedance 50or 75ΩVSWR2.0:1maximum Operating temperature range -40to +85°CMechanical packaging options PCB surface mount,thru-hole,&flat pack surface mount Power handling (continuous)1W typical*Figure 1.1Standard Capabilities**Contact Skyworks application engineering for assistance with any other requirement.Standard Filters/Duplexers*This list contains Trans-Tech most popular filter and diplexer designs.A variety of footprints and configurations are available for application-specific needs.Please contact the factory or your local representative with your specifications or for more informa-tion on any of these designs.Trans-Tech maintains a list of over 700active filters and diplexers.We welcome every opportunity to assist in the selection or creation of a filter or diplexer that will meet your specifications.Standard Filter Selection GuideTrans-Tech has a wide range of standard filters,as well as the capability to rapidly create new custom designs.Figure 1.1illus-trates our general capability for filters.If a desired requirement falls within the listed categories,Trans-Tech can easily offer a suitable design.Beyond this general list,Trans-Tech has a staff of experienced filter designers who can provide new custom and more technologically difficult filters.In addition,the CRaFT pro-gram functions as a useful tool when analyzing filter requirements.Trans-Tech welcomes the chance to review specifications and determine a design solution.Center FrequencyBandwidth Insertion LossPart Number Filter Type Size/Poles (MHz)(MHz)(dB)Package TT3P2-1068P0-3507Band Pass 3mm/2pole 1068350.7PCB SMT TT4P2-1013P2-2020Band Pass 4mm/2pole 1013202PCB SMT TT4P2-1082.5P2-0720Band Pass 4mm/2pole 1082.572PCB SMT TT4P2-1082P2-0620Band Pass 4mm/2pole 108262PCB SMT TT4P2-1090P2-0610Band Pass 4mm/2pole 109061PCB SMT TT4P3-1030P2-1535Band Pass 4mm/3pole 103015 3.5PCB SMT TT4P3-1067P2-4420Band Pass 4mm/3pole 1067442PCB SMT TT6P4-1080P4-7015Band Pass 6mm/4pole 108070 1.5PCB SMT TT6P4-1090P2-1036Band Pass6mm/4pole1090103.6PCB SMTCATVCenter FrequencyBandwidth Insertion LossPart Number Filter Type Size/Poles (MHz)(MHz)(dB)Package TT6P6-0750P0-5017Band Pass 6mm/4pole 75050 1.7PCB SMT TT6P5-0765P0-11225Band Pass 6mm/5pole 765112 2.5PCB SMT TT6P2-0770T-1215Band Pass 6mm/2pole 77012 1.5PCB SMT TT6P3-0770T-1225Band Pass 6mm/3pole 77012 2.5PCB SMT TT6P3-0770T-2020Band Pass6mm/3pole770202PCB SMTWCSDATA SHEET•INTRODUCTION AND APPLICATIONS FOR CERAMIC BAND PASS FILTERSMDSCenter Frequency Bandwidth Insertion Loss Part Number Filter Type Size/Poles(MHz)(MHz)(dB)PackageTT4P3-2120P2-6020Band Pass4mm/3pole2120602PCB SMTTT4P6-2122P0-2835Band Pass4mm/6pole212228 3.5PCB SMTTT6P4-2158P2-14220Band Pass4mm/4pole2158142PCB SMTTT6P6-2500P3-3635Band Pass6mm/6pole250036 3.5PCB SMTISMCenter Frequency Bandwidth Insertion Loss Part Number Filter Type Size/Poles(MHz)(MHz)(dB)PackageTT4P2-0915P2-2620Band Pass4mm/2pole915262PCB SMTTT6P2-0902F-2518Band Pass6mm/2pole90225 1.8PCB SMTTT6P2-0915T-2518Band Pass6mm/2pole91525 1.8PCB SMTTT6P3-0902T-2520Band Pass6mm/3pole902252PCB SMTTT6P3-0915T-2520Band Pass6mm/3pole915252PCB SMTTT6P3-0917F-1425Band Pass6mm/3pole91714 2.5PCB SMTTT3P3-2400P1-1030Band Pass3mm/3pole2400103PCB SMTTT3P3-2450P1-1445Band Pass3mm/3pole245014 4.5PCB SMTTT6P3-2467P0-3330Band Pass6mm/3pole2467333PCB SMTCellular/PCS/DCS/UMTSCenter Frequency Bandwidth Insertion Loss Part Number Filter Type Size/Poles(MHz)(MHz)(dB)PackageTT3P2-1880P0-6010Band Pass3mm/2pole1880601PCB SMTTT3P3-0881.5P2-2530Band Pass3mm/3pole881.5253PCB SMTTT3P3-1880P0-6022Band Pass3mm/3pole188060 2.2PCB SMTTT3P3-1960P0-6022Band Pass3mm/3pole196060 2.2PCB SMTTT3P3-1960P2-6030Band Pass3mm/3pole1960603PCB SMTTT3P4-0836.5P2-2525Band Pass3mm/4pole836.525 2.5PCB SMTTT3P4-0881.5P2-2525Band Pass3mm/4pole881.525 2.5PCB SMTTT3P4-1880P2-6020Band Pass3mm/4pole1880602PCB SMTTT3P4-1880P2-6030Band Pass3mm/4pole1880603PCB SMTTT4P3-0863P0-0585Band Pass4mm/3pole86358.5PCB SMTTT4P3-2180P1-2540Band Pass4mm/3pole2180254PCB SMTTT4P4-1880P0-6216Band Pass4mm/4pole188062 1.6PCB SMTTT4P4-1960P0-6216Band Pass4mm/4pole196062 1.6PCB SMTTT4P5-2240P2-1032Band Pass4mm/5pole224010 3.2PCB SMTTT4P6-0860.5P0-1937Band Pass4mm/6pole860.519 3.7PCB SMTTT6P3-0836T-2520Band Pass6mm/3pole836252PCB SMTTT6P3-0860P3-2020Band Pass6mm/3pole860202PCB SMTTT6P3-0860T-2020Band Pass6mm/3pole860202PCB SMTTT6P3-0881F-2520Band Pass6mm/3pole881252PCB SMTTT6P5-1960P0-6025Band Pass6mm/5pole196060 2.5PCB SMTTT6P5-2280P1-7032Band Pass6mm/5pole228070 3.2PCB SMTTT6P6-1900P3-8035Band Pass6mm/6pole190080 3.5PCB SMTTT6P3-2140P2-6011Band Pass6mm/3pole214060 1.1PCB SMTTT6P10-R1950-T2140Diplexer6mm/10pole1950--PCB SMTDATA SHEET•INTRODUCTION AND APPLICATIONS FOR CERAMIC BAND PASS FILTERSGPSCenter Frequency Bandwidth Insertion Loss Part Number Filter Type Size/Poles(MHz)(MHz)(dB)Package TT4P4-R1227.6-T1575.42Diplexer6mm/3pole1227.6--PCB SMT TT4P3-1227.6P1-2030Band Pass6mm/3pole1227.6203PCB SMT TT4P3-1575.42P2-2040Band Pass6mm/3pole1575.42204PCB SMT TT3P3-1227.6P1-1030Band Pass6mm/3pole1227.6103PCB SMT TT3P3-1575.42P2-1030Band Pass6mm/3pole1575.42103PCB SMTOtherCenter Frequency Bandwidth Insertion Loss Part Number Filter Type Size/Poles(MHz)(MHz)(dB)Package TT3P4-2513P2-5055Band Pass6mm/3pole251350 5.5PCB SMT TT3P5-3687P1-7466Band Pass6mm/3pole368774 6.6PCB SMT TT4P3-3417P2-0220Band Pass6mm/3pole341722PCB SMT TT4P5-1090P0-1050Band Pass6mm/3pole1090105PCB SMT TT6P5-0810P3-5030Band Pass6mm/3pole810503PCB SMT TT6P4-0509P7-0148Band Pass6mm/3pole5091 4.8PCB SMT TT4P4-1000P2-1030Band Pass6mm/3pole1000103PCB SMT TT6P3-0826.5P3-0520Band Pass6mm/3pole826.552PCB SMT TT6P3-0827P3-0620Band Pass6mm/3pole82562PCB SMT TT6P6-1000P5-8530Band Pass6mm/3pole1000853PCB SMT TT6P6-0545P6-3022Band Pass6mm/3pole54530 2.2PCB SMT TT4P3-3500P2-10020Band Pass6mm/3pole3500102PCB SMT TT6P6-0889P3-4029Band Pass6mm/3pole88940 2.9PCB SMT TT6P4-0722P4-4817Band Pass6mm/3pole72248 1.7PCB SMT TT3P3-1088P2-9015Band Pass6mm/3pole108890 1.5PCB SMT TT6P3-0740P3-2020Band Pass6mm/3pole740202PCB SMT TT6P5-1950P3-6040Band Pass6mm/3pole1950604PCB SMT TT3P4-0917P2-4524Band Pass6mm/3pole91745 2.4PCB SMT TT6P3-1090P2-1029Band Pass6mm/3pole109010 2.9PCB SMT TT6P4-0770P0-1240Band Pass6mm/3pole770124PCB SMT TT6P3-1030P2-1029Band Pass6mm/3pole103010 2.9PCB SMT TT6P5-0881.5P0-2530Band Pass6mm/3pole881.5253PCB SMT TT6P3-0730P3-1213Band Pass6mm/3pole73012 1.3PCB SMT TT6P3-0445.25T-0145Band Pass6mm/3pole445.251 4.5PCB SMT TT4P3-2400P1-20015Band Pass6mm/3pole240020 1.5PCB SMT TT6P3-1080P2-0650Band Pass6mm/3pole108065PCB SMT TT6P3-0745.3P3-1920Band Pass6mm/3pole745.3192PCB SMT TT6P4-0435P0-3019-NS Band Pass6mm/3pole43530 1.9PCB SMT TT3P4-0895.5P2-3926Band Pass6mm/3pole895.539 2.6PCB SMTDATA SHEET •INTRODUCTION AND APPLICATIONS FOR CERAMIC BAND PASS FILTERSAvailable PackagesTrans-Tech offers filters in a number of standard packages.In addition to SMT,Trans-Tech offers a flat-pack and through-hole configuration.Mechanical drawings are provided for most of our filters.In addition to our standard offering,Trans-Tech has the capability and experience to meet many unique footprint layouts and custom packages.For each of our 2to 6pole packages,Trans-Tech can offer pro-files ranging from 2mm to 6mm.2mm SMTTT2P2—P—TT2P3—P—TT2P4—P—TT2P5—P—TT2P6—P—SMT FilterLengthFilter Inches mm P10.43411P20.51213P30.59015P40.66917P50.74819P60.82721P70.90623P0CustomCustomDimension ‘L’will vary in length dependent upon filter’s frequency.DATA SHEET •INTRODUCTION AND APPLICATIONS FOR CERAMIC BAND PASS FILTERSTT3P2—P—3mmSMTTT3P3—P—TT3P4—P—TT3P5—P—TT3P6—P—Dimension ‘L’will vary in length dependent upon filter’s frequency.SMT Filter LengthFilter Inches mm P10.43411P20.51213P30.59015P40.66917P50.74819P60.82721P70.90623P0CustomCustomDATA SHEET •INTRODUCTION AND APPLICATIONS FOR CERAMIC BAND PASS FILTERSTT4P2—P—4mmSMTTT4P3—P—TT4P4—P—TT4P5—P—TT4P6—P—Dimension ‘L’will vary in length dependent upon filter’s frequency.SMT Filter LengthFilter Inches mm P10.43411P20.51213P30.59015P40.66917P50.74819P60.82721P70.90623P0CustomCustomDATA SHEET •INTRODUCTION AND APPLICATIONS FOR CERAMIC BAND PASS FILTERSTT6P2—P—6mmSMTTT6P3—P—TT6P4—P—TT6P5—P—TT6P6—P—Dimension ‘L’will vary in length dependent upon filter’s frequency.SMT Filter LengthFilter Inches mm P10.43411P20.51213P30.59015P40.66917P50.74819P60.82721P70.90623P0CustomCustomDATA SHEET •INTRODUCTION AND APPLICATIONS FOR CERAMIC BAND PASS FILTERS6mm Flat Pack (F)6mm Thru-Hole (T)TT6P2—FTT6P2—TTT6P3—TTT6P3—FDimension ‘L’will vary in length dependent upon filter’s frequency.DATA SHEET•INTRODUCTION AND APPLICATIONS FOR CERAMIC BAND PASS FILTERSCopyright©2006,2007,Trans-Tech Inc.,Inc.All Rights Reserved.Information in this document is provided in connection with Trans-Tech,Inc.("Trans-Tech"),a wholly-owned subsidiary of Skyworks Solutions,Inc.These materials,including the information contained herein,are provided by Trans-Tech as a service to its customers and may be used for informational purposes only by the customer.Trans-Tech assumes no responsibility for errorsor omissions in these materials or the information contained herein.Trans-Tech may change its documentation,products,services,specifications or product descriptions at any time,without notice.Trans-Tech makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts,incompatibilities,or other difficulties arising fromany future changes.No license,whether express,implied,by estoppel or otherwise,is granted to any intellectual property rights by this document.Trans-Tech assumes no liability for any materials,products or information provided hereunder,including the sale,distribution,reproduction or use of Trans-Tech products,information or materials,except as may be provided in Trans-Tech Terms and Conditions of Sale.THE MATERIALS,PRODUCTS AND INFORMATION ARE PROVIDED"AS IS"WITHOUT WARRANTY OF ANY KIND,WHETHER EXPRESS,IMPLIED,STATUTORY,OR OTHERWISE,INCLUDING FITNESS FOR A PARTICULAR PURPOSE OR USE,MERCHANTABILITY,PERFORMANCE,QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT;ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED.TRANS-TECH DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION,TEXT,GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS.TRANS-TECH SHALL NOT BE LIABLE FOR ANY DAMAGES,INCLUDING BUT NOT LIMITED TO ANY SPECIAL,INDIRECT,INCIDENTAL,STATUTORY,OR CONSEQUENTIAL DAMAGES,INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION,WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.Trans-Tech products are not intended for use in medical,lifesaving or life-sustaining applications,or other equipment in which the failure of the Trans-Tech products could lead to personal injury, death,physical or environmental damage.Trans-Tech customers using or selling Trans-Tech products for use in such applications do so at their own risk and agree to fully indemnify Trans-Tech for any damages resulting from such improper use or sale.Customers are responsible for their products and applications using Trans-Tech products,which may deviate from published specifications as a result of design defects,errors,or operation of products outside of published parameters or design specifications.Customers should include design and operating safeguards to minimize these and other risks.Trans-Tech assumes no liability for applications assistance,customer product design,or damage to any equipment resulting from the use of Trans-Tech products outside of stated published specifications or parameters.。
滤波器主要参数与特性指标
滤波器的主要参数〔Definitions〕：中心频率〔Center Frequency〕：滤波器通带的频率f0，一般取f0=〔f1+f2〕/2，f1、f2为带通或带阻滤波器左、右相对下降1dB或3dB边频点。
窄带滤波器常以插损最小点为中心频率计算通带带宽。
截止频率〔Cutoff Frequency〕：指低通滤波器的通带右边频点及高通滤波器的通带左边频点。
通常以1dB或3dB相对损耗点来标准定义。
相对损耗的参考基准为：低通以DC处插损为基准，高通那么以未出现寄生阻带的足够高通带频率处插损为基准。
通带带宽〔BWxdB〕：指需要通过的频谱宽度，BWxdB=〔f2-f1〕。
f1、f2为以中心频率f0处插入损耗为基准，下降X〔dB〕处对应的左、右边频点。
通常用X=3、1、0.5 即BW3dB、BW1dB、BW0.5dB 表征滤波器通带带宽参数。
分数带宽〔fractional bandwidth〕=BW3dB/f0×100[%]，也常用来表征滤波器通带带宽。
插入损耗〔Insertion Loss〕：由于滤波器的引入对电路中原有信号带来的衰耗，以中心或截止频率处损耗表征，如要求全带内插损需强调。
纹波〔Ripple〕：指1dB或3dB带宽〔截止频率〕范围内，插损随频率在损耗均值曲线根底上波动的峰-峰值。
带内波动〔Passband Riplpe〕：通带内插入损耗随频率的变化量。
1dB带宽内的带内波动是1dB。
带内驻波比〔VSWR〕：衡量滤波器通带内信号是否良好匹配传输的一项重要指标。
理想匹配VSWR=1：1，失配时VSWR<1。
对于一个实际的滤波器而言，满足VSWR<1 BWdBBWdBdiv>在入射波和反射波相位一样的地方，电压振幅相加为最大电压振幅Vmax ，形成波腹；在入射波和反射波相位相反的地方电压振幅相减为最小电压振幅Vmin ，形成波节。
其它各点的振幅值那么介于波腹与波节之间。
新型的EMI滤波器BDL的优势与特征
新型的EMI滤波器BDL的优势与特征
当今高科技产品之所以能迅速向高性能、小型化、复合化方向发展是建立在电子元器件先行实现高性能、小型化、复合化的基础之上的；高性能、小型化、复合化已成为当今世界高科技产品迅速发展的必然趋势。
BDL EMI滤波器是其中一个为世人注目的高科技新产品，英文名称BDL（Balanced Dual-Line EMI Filter）它从1999年问世和在美国注册专利以来，已广泛应用于通信、网络、军事、航空、航天、医疗、消费电子、连接器等的电磁兼容领域之中。
BDL优势极其明显：
有极好的差模/共模噪声抑制效果!
降低系统噪声转换情况：
共模噪声转换成差模噪声会降低系统的抗干扰能力!
差模噪声转共模噪声会增加系统往外辐射的能量价格节省将近85%!
优化PCB面积：＞70%!
器件体积平均减少73%! 满足超薄设计需求！
直接取代共模电感+2-3个滤波电容的传统L-C滤波电路！
具有更良好的温度和振动特性,直接达到125 ℃车规级。
用于DC-DC滤波优势明显。
与传统滤波电路28:1噪声幅值抑制；
频域噪声抑制最大达41dBuVZ;
可同时降低传导/辐射发射。
1BDL EMI滤波器的特色
虽然BDL的电原理图和一般的EMI滤波器区别不大，它不过是由两个Y电容和一个X 电容构成的一般EMI滤波器而已，见图1a)所示。
如果进一步观察它具有结构特征的电理图，就会发现它的与众不同之处，见图1b)。
LC带通滤波器规格书
1、技术指标及
项目
技术指标
产品型号
（要有封装代码信息）
中心频率f0
500MHz(点频)
插入损耗
≤3.0dB
带外抑制
-75dBc@400MHz及以外;-75dBc@600MHz及以外;
端口驻波
≤1.5
输入输出接口
SMA-K可拆卸,内为φ0.4针,出针长度大于4.5mm
2、工作环境
工作温度
-10℃～+50℃
存储温度
-30℃～+60℃
3、参考尺寸：30mm×12mm×7.5mm（图1），外壳材料：铝，表面镀银
安装方式：背插
数量：1只
图1
LC带通滤波器技术协议2
1、技术指标及
项目
技术指标
产品型号
（要有封装代码信息）
中心频率f0
1000MHz(点频)
插入损耗
≤3.0dB
带外抑制
-75dBc@500MHz及以外;-75dBc@1500MHz及以外;
产品型号
（要有封装MHz(点频)
插入损耗
≤3.0dB
带外抑制
-75dBc@1000MHz及以外;-75dBc@2000MHz及以外;
端口驻波
≤1.5
输入输出接口
SMA-K可拆卸,内为φ0.4针,出针长度大于4.5mm
2、工作环境
工作温度
-10℃～+50℃
存储温度
-30℃～+60℃
端口驻波
≤1.5
输入输出接口
SMA-K可拆卸,内为φ0.4针,出针长度大于4.5mm
2、工作环境
工作温度
-10℃～+50℃
滤波器主要参数与特性指标-滤波器的主要性能参数
滤波器的主要参数（Definitions）：之袁州冬雪创作中心频率（Center Frequency）：滤波器通带的频率f0，一般取f0=（f1+f2）/2，f1、f2为带通或带阻滤波器左、右相对下降1dB或3dB边频点.窄带滤波器常以插损最小点为中心频率计算通带带宽.截止频率（Cutoff Frequency）：指低通滤波器的通带右边频点及高通滤波器的通带左边频点.通常以1dB或3dB相对损耗点来尺度定义.相对损耗的参考基准为：低通以DC处插损为基准，高通则以未出现寄生阻带的足够高通带频率处插损为基准.通带带宽（BWxdB）：指需要通过的频谱宽度，BWxdB=（f2-f1）.f1、f2为以中心频率f0处拔出损耗为基准，下降X（dB）处对应的左、右边频点.通常常使用X=3、1、0.5 即BW3dB、BW1dB、BW0.5dB 表征滤波器通带带宽参数.分数带宽（fractional bandwidth）=BW3dB/f0×100[%]，也常常使用来表征滤波器通带带宽.拔出损耗（Insertion Loss）：由于滤波器的引入对电路中原有信号带来的衰耗，以中心或截止频率处损耗表征，如要求全带内插损需强调.纹波（Ripple）：指1dB或3dB带宽（截止频率）范围内，插损随频率在损耗均值曲线基础上动摇的峰-峰值.带内动摇（Passband Riplpe）：通带内拔出损耗随频率的变更量.1dB带宽内的带内动摇是1dB.带内驻波比（VSWR）：衡量滤波器通带内信号是否杰出匹配传输的一项重要指标.抱负匹配VSWR=1：1，失配时VSWR<1.对于一个实际的滤波器而言，知足VSWR<1 BWdBBWdBdiv>在入射波和反射波相位相同的地方，电压振幅相加为最大电压振幅Vmax ，形成波腹；在入射波和反射波相位相反的地方电压振幅相减为最小电压振幅Vmin ，形成波节.其它各点的振幅值则介于波腹与波节之间.这种合成波称为行驻波.驻波比是驻波波腹处的电压幅值Vmax与波节处的电压幅值Vmin之比.回波损耗（Return Loss）：端口信号输入功率与反射功率之比的分贝（dB）数，也等于|20Log10ρ|，ρ为电压反射系数.输入功率被端口全部吸收时回波损耗为无穷大.回波损耗，又称为反射损耗.是电缆链路由于阻抗不匹配所发生的反射，是一对线自身的反射.从数学角度看，回波损耗为-10 lg [(反射功率)/(入射功率)].回波损耗愈大愈好，以减少反射光对光源和系统的影响.阻带抑制度：衡量滤波器选择性能好坏的重要指标.该指标越高说明对带外干扰信号抑制的越好.通常有两种提法：一种为要求对某一给定带外频率fs抑制多少dB，计算方法为fs处衰减量As-IL；另外一种为提出表征滤波器幅频响应与抱负矩形接远程度的指标——矩形系数（KxdB<1），KxdB=BWxdB/BW3dB，（X可为40dB、30dB、20dB等）.滤波器阶数越多矩形度越高——即K越接近抱负值1，制作难度当然也就越大.延迟（Td）：指信号通过滤波器所需要的时间，数值上为传输相位函数对角频率的导数，即Td=df/dv.带内相位线性度：该指标表征滤波器对通带内传输信号引入的相位失真大小.按线性相位响应函数设计的滤波器具有杰出的相位线性度.特性指标1、特征频率：1）通带截频fp=wp/（2p）为通带与过渡带鸿沟点的频率，在该点信号增益下降到一个人为规定的下限；2）阻带截频fr=wr/（2p）为阻带与过渡带鸿沟点的频率，在该点信号衰耗下降到一人为规定的下限；3）转折频率fc=wc/（2p）为信号功率衰减到1/2（约3dB）时的频率，在很多情况下，常以fc作为通带或阻带截频；4）固有频率f0=w0/（2p）为电路没有损耗时，滤波器的谐振频率，复杂电路往往有多个固有频率.2、增益与衰耗滤波器在通带内的增益并不是常数.1）对低通滤波器通带增益Kp一般指w=0时的增益；高通指w→∞时的增益；带通则指中心频率处的增益；2）对带阻滤波器，应给出阻带衰耗，衰耗定义为增益的倒数；3）通带增益变更量△Kp指通带内各点增益的最大变更量，如果△Kp以dB为单位，则指增益dB值的变更量.3、阻尼系数与品质因数阻尼系数是表征滤波器对角频率为w0信号的作用，是滤波器中暗示能量衰耗的一项指标.阻尼系数的倒数称为品质因数，是*价带通与带阻滤波器频率选择特性的一个重要指标，Q= w0/△w.式中的△w为带通或带阻滤波器的3dB带宽，w0为中心频率，在很多情况下中心频率与固有频率相等.品质因数电学和磁学的量.暗示一个储能器件（如电感线圈、电容等）、谐振电路中所储能量同每周期损耗能量之比的一种质量指标；串联谐振回路中电抗元件的Q值等于它的电抗与其等效串联电阻的比值；元件的Q值愈大，用该元件组成的电路或网络的选择性愈佳.在串联电路中，电路的品质因数Q有两种丈量方法，一是根据公式 Q=UL/U0=Uc/U0测定，Uc与UL分别为谐振时电容器C与电感线圈L上的电压；另外一种方法是通过丈量谐振曲线的通频带宽度△f=f2-f1，再根据Q=f0/(f2-f1)求出Q值.式中f0为谐振频率，f2与f1是失谐时，亦即输出电压的幅度下降到最大值的1/√2（=0.707)倍时的上、下频率点.Q值越大，曲线越尖锐，通频带越窄，电路的选择性越好.4、活络度滤波电路由许多元件构成，每一个元件参数值的变更都会影响滤波器的性能.滤波器某一性能指标y对某一元件参数x变更的活络度记作Sxy，定义为：Sxy=(dy/y)/(dx/x).该活络度与丈量仪器或电路系统活络度不是一个概念，该活络度越小，标记着电路容错才能越强，稳定性也越高.5、群时延函数当滤波器幅频特性知足设计要求时，为包管输出信号失真度不超出允许范围，对其相频特性∮(w)也应提出一定要求.在滤波器设计中，常常使用群时延函数d∮(w)/dw*价信号经滤波后相位失真程度.群时延函数d∮(w)/dw越接近常数.。
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OVERVIEW: Multilayer chip EMI Filter has balanced impedance for superior filtering of radiated and
conducted common-mode EMC noise. The terminal arrangement of this low ESL component also supports connection option for single-ended (power bypass) noise reduction applications .
PART NUMBER: E18M0035B100MN
E18M 0035 B 100 M N
Size 1206 (3216)
SRF 35 MHz
TC +/- 15%
Voltage 100 VDC
Cap. Tol ± 20%
Terminal Standard
CHARACTERISTICS:
Case Size 1206 EIA (3216 Metric) SRF 35MHz
Inductance: 56pH power bypass, 212pH dual-line EMI filter Capacitance: 100nF (x 2)
Rated Voltage: 100 VDC
Temperature Coefficient: ±15% (-55 to +125C) Dissipation Factor: ≤ 2.5% (0.025)
Insulation Resistance: IR> 500 Ω•F or 10G Ω whichever is less Measurement at 25C, WVDC, time is 2 minutes max.
Dielectric Strength: 2.5XWVDC, 25C, 50mA max. Capacitance Aging: ≤ 2.5%/decade hour Test
Conditions:
1kHz±50Hz; 1.0±0.2VRMS
PHYSICAL SIZE:
SIZE IN
(mm)
L
.124 ± .010
3.15 ± .254 W .063 ± .010 1.60 ± .254 T .050 max. 1.27 max. EB .016 ± .010 .406 ± .254 CB .040 ± .005 1.016 ± .127 WB
006 ± .004
.152 ± .100
ENVIRONMENTAL
Meets Rohs & Reach directives MSL Rating: 1
EMI FILTER INSERTION LOSS
DUAL LINE CONNECTION* PWR BYPASS CONNECTION
*EMC performance is a function both insertion loss and impedance matching / low noise-mode conversion. Connection graphics are representative, not all possible options are shown.
PCB layout is critical for correct RF response. Technical support is available for new designs. SOLDER PAD RECOMMENDATIONS:
SOLDER PROCESS RECOMMENDATIONS:
SOLDER REFLOW: Recommended temperature profiles for reflow soldering are shown in Table 1 and Figure 1 from J-STD-020C
Preheat ramp: 1-3C/sec.
Preheat: 75-125C < T (max)
T (max): 210-260C
SOLDER WAVE: Caution, NOT recommended for sizes >1206
Preheat Temp.:100-120C
∆ T Pre-Heat: 150C max.
Soldering Peak Temp.:
250-260C, 5 SEC. max.
Cool Down: <2C/SEC
SOLDERING IRON:
NOT SUPPORTED for use in mass production
Not recommended for lab proto-typing, use solder reflow, hot-air tool, or conductive epoxy to avoid thermal damage and compromised test results. If Iron is used, follow below precautions:
•Preheat circuit and capacitors to within 100° C of soldering temperature
•No contact of iron tip with component
•20 watt iron output (max)
•350° C tip temperature (max)
• 1.0 mm tip diameter (max)
•Limit soldering time to 3 sec. (max)
PACKAGING SPECIFICATIONS
Specification EIA standard 481
PART SIZE 7” REEL QTY
1206 (3216) 4,000
Notice: Specifications are subject to change without notice. Contact your nearest Johanson Dielectrics, Inc. Sales Office for the latest specifications. All statements, information and data given herein are believed to be accurate and reliable, but are presented without guarantee, warranty, or responsibility of any kind, expressed or implied. Statements or suggestions concerning possible use of our products are made without representation or warranty that any such use is free of patent infringement and are not recommendations to infringe any patents. The user should not assume that all safety measures are indicated or that other measures may not be required. Specifications are typical and may not apply to all applications.。