【经验】嵌入式射频产品,通过粘贴屏蔽材料MHLL5040-200完美解决了金属的干扰

2019-10-22 世强
屏蔽材料,MHLL5040-200,Laird 屏蔽材料,MHLL5040-200,Laird 屏蔽材料,MHLL5040-200,Laird 屏蔽材料,MHLL5040-200,Laird

对于射频类产品在使用过程中不可避免的会受到金属环境的干扰,对于干扰轻则影响识读距离,严重的话通信都会受到影响造成设备的不能正常工作。我司开发的一款嵌入式射频产品,通过粘贴铁氧体材料完美的解决了金属的干扰。关于射频机具模块功能框图如下图所示:

图1功能框图

射频工作的两个关键因素是调制和场强;场强保证能否激活射频卡片,调制则保证数据通信是否正常。在办公室环境下调试阅读机具调制系数11.92%,满足设计要求(8%~14%)机读射频卡信息没有问题。实际测试调制波形如下:

图2裸板调制系数

当把阅读机具放入嵌入式设备中,发现有些射频标签不能识读,而且识读率很差。与射频芯片厂家沟通确认后找到问题点,在设备安装是天线板距离板金比较近,由于板金对射频辐射的磁场会产生干扰,影响通信造成识读率的下降;实际测试装入机器时调制系数波形如下:

图3装机调制系数

测量调制系数:5.37%超出了标准范围(8%~14%)。因为天线板的位置和板金的位置都不能改动,与射频芯片厂家沟通,他们告知可以通过在天线板下方的金属板上贴上铁氧体屏蔽材料解决,并给推荐了一款屏蔽材料MHLL5040-200;这款屏蔽材料针对的频段也是13.56MHz,尺寸大小50*40mm。将屏蔽材料粘贴到天线板下方实际测试调制系数波形如下

调制系数:10.20%满足设计要求(8%~14%)。测试可靠性识读率也没有出现问题,通过粘贴屏蔽材料完美的解决了金属对射频的干扰。

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白皮书  -  LAIRD  - 2021/7/8 PDF 英文 下载

【选型】Laird(莱尔德) 导电橡胶选型指南

目录- ELECTROSEAL™导电橡胶压制品    矩形条导电橡胶压制品    空心矩形条导电橡胶压制品    空心D型条导电橡胶压制品    O型条管导电橡胶压制品    D型条导电橡胶压制品    通道条导电橡胶压制品    O型条导电橡胶压制品    P型条导电橡胶压制品    GEMINI™混合压成品    模制O型环    平垫圈垫片    模制波导垫片    矩形波导垫片    ElectroMet™定向线    ElectroMet™浸渍钢丝网和金属网状MIL接头垫片    MIL连接器垫圈    D型超小接头屏蔽罩    自动点胶工艺    现场制模电路板防护罩    ElectroCoat™导电橡胶    板到底盘托脚    EMI垫片的腐蚀性   

型号- 8408-0227-XX,8863-0150,8569-0131-XX,8516-0132-XX,8516-0155-XX,8560-0099-XX,8560-0110-XX,8563-0167-XX,8516-0201-XX,8860-0100-300-XX,8563-0098-XX,8866-0100,8863-0140,8863-0145,8866-0103,8866-0105,8563-0315-XX,8516-0109-XX,8867-0166,8867-0165,8563-0108-XX,8516-0120-XX,8563-0076-XX,8563-0326-XX,8563-0213-XX,8863-0130,8866-0110,SIL35-HXP,8866-0111,8863-0135,8866-0116,8563-0339-XX,8408-0215-XX,8516-0108-XX,8516-0167-XX,8408-0251-XX,8866-0120,8560-0144-XX,8863-0120,8866-0125,8860-0020-150-XX,8866-0126,8866-0127,8563-0122-XX,8516-0156-XX,8866-0129,8560-0098-XX,8516-0131-XX,8863-0125,8563-0131-XX,8516-0145-XX,8860-0125-100-XX,8563-0248-XX,8863-0196,8863-0197,8560-0108-XX,8560-0143-XX,8863-0199,8408-0203-XX,8563-0077-XX,8516-0119-XX,8516-0157-XX,8863-0180,8563-0281-XX,8860-0045-324-XX,8863-0183,8863-0184,8516-0211-XX,8863-0189,8516-0405-XX,8408-0126-XX,8516-0168-XX,8563-0166-XX,SNC70-RXP,8868-0085,8560-0330-XX,8516-0118-XX,8863-0170,8868-0084,8863-0175,8868-0081,8516-0130-XX,8563-0089-XX,8860-0093-100-XX,8516-0146-XX,8516-0169-XX,8563-0165-XX,8408-0230-XX,8863-0160,8408-0213-XX,8516-0212-XX,8863-0165,8516-0107-XX,8563-0143-XX,8516-0141-XX,8516-0164-XX,8563-0106-XX,8563-0078-XX,8516-0135-XX,8860-0093-324-XX,8416-0320-22,8516-0404-XX,8563-0090-XX,8408-0127-XX,8563-0129-XX,8416-0120-23,8516-0123-XX,8563-0130-XX,8408-0242-XX,8860-0045-300-XX,8416-0320-21,8563-0187-XX,8516-0204-XX,8563-0279-XX,8408-0254-XX,8408-0116-XX,8408-0212-XX,8516-0153-XX,8563-0255-XX,8563-0232-XX,8560-0158-XX,8516-0111-XX,8560-0331-XX,8867-0105,8563-0079-XX,8860-0093-300-XX,8516-0403-XX,8563-0280-XX,8867-0100,8563-0164-XX,8867-0102,8867-0101,8560-0113-XX,8867-0136,8416-0120-57,8563-0068-XX,8563-0139-XX,8563-0211-XX,8516-0122-XX,8563-0080-XX,8560-0100-XX,8563-0140-XX,8563-0234-XX,8408-0140-XX,8862-0105,8563-0257-XX,SNN60-RXP,8862-0100,8867-0130,8516-0165-XX,8860-0032-324-XX,8867-0126,8867-0125,8867-0128,8860-0062-100-XX,8867-0127,SNL25-RXP,8860-0032-150-XX,8860-0125-324-XX,8563-0091-XX,8408-0200-XX,8563-0128-XX,8867-0158,SNL60-RXP,8560-0145-XX,8560-0097-XX,8516-0203-XX,8860-0045-100-XX,8563-0327-XX,8867-0147,8563-0069-XX,8863-01200,8408-0117-XX,8516-0121-XX,8862-0114,8867-0144,8862-0113,8408-0128-XX,8516-0110-XX,8563-0185-XX,8862-0112,8867-0141,8864-2618,8408-0118-XX,8868-0100,8861-0130,8861-0131,8861-0135,8861-0136,8864-3824,8563-0253-XX,8560-0104-XX,8563-0196-XX,8408-0130-XX,8868-0105,8860-0100-100-XX,8516-0161-XX,8861-0120,8861-0121,8861-0125,8864-3714,8864-3715,8860-0093-150-XX,8408-0221-XX,SNC70-HXP,8516-0126-XX,8563-0070-XX,8560-0116-XX,8865-0144,8516-0137-XX,8516-0162-XX,8516-0114-XX,8865-0140,8860-0125-150-XX,8861-0110,8861-0115,8860-0125-300-XX,SNN65-HXP,8860-0062-324-XX,8408-0245-XX,8563-0127-XX,8865-0145,8563-0161-XX,8596-0096-XX,8861-0105,8563-0241-XX,8864-0105,8864-0104,8864-0103,8864-0102,8563-0218-XX,8864-0101,8408-0209-XX,8864-0100,8516-0173-XX,8861-0100,8560-0299-XX,8861-0103,8563-0334-XX,8865-0120,8560-0114-XX,8408-0120-XX,8563-0116-XX,8516-0102-XX,8516-0125-XX,8516-0151-XX,8864-0110,8864-0231,8516-0205-XX,8560-0435-XX,8416-0330-21,8563-0071-XX,8416-0330-22,8865-0125,8865-0130,8864-0127,8864-0125,8408-0257-XX,8563-0243-XX,8563-0094-XX,8516-0136-XX,8864-3515,8563-0159-XX,8563-0254-XX,8864-0120,8516-0185-XX,8865-0135,8864-0139,8864-0137,8865-0100,8563-0072-XX,8864-0136,8864-0135,8563-0095-XX,8560-0231-XX,8860-0032-300-XX,8516-0101-XX,8865-0105,SNK55-RXP,8865-0110,8864-0147,8516-0163-XX,8864-0144,8516-0124-XX,8516-0152-XX,8864-0143,8865-0116,8560-0505-XX,8864-0142,8563-0126-XX,8864-0141,8569-0127-XX,8860-0062-300-XX,8865-0115,8563-0324-XX,8864-0159,8864-0156,8868-0067,8516-0170-XX,8866-0050,8516-0158-XX,8516-0209-XX,8516-0106-XX,8864-0153,8868-0055,8563-0073-XX,8864-0168,8864-0167,8868-0056,8864-0166,8563-0342-XX,8563-0285-XX,8408-0133-XX,8563-0250-XX,8408-0218-XX,8516-0147-XX,8864-0163,8864-0162,8864-0161,8408-0294-XX,8864-0160,8408-0206-XX,8408-0248-XX,8860-0100-150-XX,8516-0210-XX,8563-0062-XX,8861-0192,8861-0193,8563-0226-XX,8560-0234-XX,8864-0055,8864-0053,8864-0173,8864-0172,8864-0050,8864-0171,8563-0274-XX,8864-010462,8864-0170,ELECTROCOAT,8563-0323-XX,8860-0032-100-XX,8563-0096-XX,8861-0188,8560-0444-XX,8516-0159-XX,8861-0189,8560-0107-XX,8563-0249-XX,8408-0110-XX,8861-0181,8861-0182,8861-0183,8861-0184,8864-0060,8864-0180,8563-0074-XX,8560-0200-XX,8563-0263-XX,8860-0020-300-XX,8563-0097-XX,8516-0160-XX,8861-0174,8563-0343-XX,8861-0175,8866-0130,8866-0131,8861-0179,8866-0134,8866-0135,8866-0136,8866-0137,8863-0110,8866-0139,8861-0172,8861-0173,8863-0115,8408-0111-XX,8516-0148-XX,8516-0408-XX,8563-0180-XX,8563-0216-XX,8408-0123-XX,8860-0045-150-XX,8516-0171-XX,8563-0113-XX,8861-0167,8861-0169,8860-0020-100-XX,8516-0105-XX,8866-0148,8863-0100,8560-0453-XX,8560-0105-XX,8863-0105,8861-0160,8516-0208-XX,8860-0100-324-XX,8868-0120,8563-0322-XX,8868-0125,8516-0172-XX,8861-0155,8866-0155,8864-0091,8516-0104-XX,8864-0090,8560-0106-XX,8563-0123-XX,8563-0251-XX,8861-0150,8860-0062-150-XX,8864-0095,8563-0075-XX,8516-0138-XX,8563-0344-XX,8

选型指南  -  LAIRD  - 2016年05月17日 PDF 中文 下载

【技术】解析Laird吸波材料分类和选型主要参数

Laird吸波材料的吸波能力较强,吸收频带较宽,是目前应用最为广泛的吸波材料类型。

技术探讨    发布时间 : 2017-08-10

莱尔德高性能材料现身第六届中国国际进口博览会,全方位展示在电子游戏市场中的高效抗干扰和散热支持

2023年11月5日至10日,杜邦公司(LAIRD母公司)以“迎变·创新·向未来”为主题,亮相在第六届中国国际进口博览会,全面展示其多元化的高科技材料和解决方案如何助力各行各业加速创新与可持续发展,实现面向未来的繁荣图景。展会期间,杜邦电子互连科技为您展示在AI引领,智能互连(电子科技);智领前行,驭电新生(下一代汽车);以及卓越工业,材料赋能(工业技术)三个主题方向的先进材料及创新应用。

原厂动态    发布时间 : 2023-11-25

【选型】Laird 导电橡胶材料选型参考,三种橡胶基质,七种填充材料

从选型角度考虑,导电橡胶材料比较关键的指标有屏蔽效能、体积电阻率、适用温度范围、材料的硬度和强度等,主要由金属填充材料的种类、填充比例、制作工艺和橡胶基质(密度、工艺等)决定。Laird推荐的导电橡胶基质有三种,EPDM(三元乙丙橡胶)、硅橡胶和氟硅橡胶。以填充物材料为区别,将Laird推荐的19款导电橡胶材料分为7个大类,简单介绍一下各自的特点和应用优势,可作为选型参考。

器件选型    发布时间 : 2019-03-26

【产品】ECCOSORB吸波材料的简介与应用

ECCOSORB吸波材料可用于跨越30MHz至100GHz频率范围的各种应用,在改善天线方向图上做出了突出贡献。

新产品    发布时间 : 2017-09-20

世强材料车规产品介绍

型号- N-SIL 8063G,N-SIL 8772,9238,GEL20,ETX系列,N-SIL 988LV,N-SIL 8742,N-PU 5103M,ETX,N-PU 5901,N-PU 5912,N-PU 5813,0838系列,NL系列,AW 2925,N-PU 5820,9238系列,EW 6300M4,N-PU 5801N,0838,N-PU 5812LE,0515系列,8630M,0515

商品及供应商介绍  -  SEKORM,台达,博恩,NIDEC,LAIRD,PARKER CHOMERICS,禧合,金菱通达,WEVO,德聚,富信科技,康达新材,LAIRD THERMAL SYSTEMS,英维克,II-VI MARLOW,SANYO DENKI,源阳热能,爱美达,仕来高  - 2023.02 PDF 中文 下载

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