期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
业余绘制双面印刷电路板技术
1
作者 黄培根 《电子制作》 2005年第4期27-32,共6页
在以前的《电子制作》文章中,我们介绍了业余条件下,快速绘制单面印刷电路板的实用技术。对功能强大的ProtelPCB99SE有了初步的了解,对它的制板设计规则和步骤也有了一定的认识,但这对于博大精深的Protel99SE系统软件来说,接触到... 在以前的《电子制作》文章中,我们介绍了业余条件下,快速绘制单面印刷电路板的实用技术。对功能强大的ProtelPCB99SE有了初步的了解,对它的制板设计规则和步骤也有了一定的认识,但这对于博大精深的Protel99SE系统软件来说,接触到的还仅仅是肤浅的皮毛,仅窥豹一斑。绘制简单电路的单面印刷电路板,我们走的是一条不规范的、实用主义的制板捷径,没有遵循ProtelPCB99SE的许多设计规则,目的是让初学者更快地入门,所以,我们采用了半自动甚至手工直接绘制单面印刷电路板的方法。 展开更多
关键词 双面印刷电路板技术 Protel99SE系统软件 连接头 网络标号
下载PDF
基于介质谐振器和PCB技术的SPDT滤波开关 被引量:1
2
作者 张朋飞 秦伟 +1 位作者 刘疆 陈建新 《重庆邮电大学学报(自然科学版)》 CSCD 北大核心 2022年第4期694-699,共6页
针对时分双工(time division duplex,TDD)子系统同时对滤波器和开关的需求,将二者相融合提出了一种滤波开关设计方案。介质谐振器滤波器因具有高Q值、低损耗等特点而被广泛研究,然而其不易与PIN管集成,难以实现开关功能。基于介质谐振... 针对时分双工(time division duplex,TDD)子系统同时对滤波器和开关的需求,将二者相融合提出了一种滤波开关设计方案。介质谐振器滤波器因具有高Q值、低损耗等特点而被广泛研究,然而其不易与PIN管集成,难以实现开关功能。基于介质谐振器和印刷电路板(printed circuit board,PCB)技术设计了一种低损耗、高隔离度的单刀双掷(single pole double throw,SPDT)滤波开关。设计以介质谐振器滤波器为滤波主体,同时在PCB上实现SPDT开关功能,滤波功能和开关功能可独立设计,降低了设计难度。开关电路在导通状态时等效为一段传输线,因而仅会增加很少的插入损耗。加工并测试了一个设计实例,测试结果表明,打开状态下的带内损耗为0.92 dB左右,关闭状态下的隔离度优于47 dB。与传统单纯PCB滤波开关相比,该设计具有更低的插入损耗、更高的隔离度。 展开更多
关键词 介质谐振器 印刷电路板(PCB)技术 滤波开关 单刀双掷(SPDT)
下载PDF
微型磁通门传感器研究 被引量:3
3
作者 李南 吕晓煜 岳喜展 《电测与仪表》 北大核心 2007年第2期57-59,共3页
介绍了一种新型的基于印刷电路板技术基础上制造的环形微型磁通门传感器的工作原理和结构。这种传感器由三层组成,上下两层用来制作铜板线圈,中间层用来制作25μm厚的高磁导率无定形铁磁薄芯。文中还研究了该传感器在不同的外部磁场方... 介绍了一种新型的基于印刷电路板技术基础上制造的环形微型磁通门传感器的工作原理和结构。这种传感器由三层组成,上下两层用来制作铜板线圈,中间层用来制作25μm厚的高磁导率无定形铁磁薄芯。文中还研究了该传感器在不同的外部磁场方向下环形磁通门传感器输出电压和和磁感的函数关系。 展开更多
关键词 微型磁通门传感器 印刷电路板技术 二次谐波电压 励磁电流
下载PDF
High power triboelectric nanogenerator based on printed circuit board (PCB) technology 被引量:11
4
作者 Changbao Han Chi Zhang +2 位作者 Wei Tang Xiaohui Li Zhong Lin Wang 《Nano Research》 SCIE EI CAS CSCD 2015年第3期722-730,共9页
Harvesting mechanical energy from our surroundings to acquire a steady and high power output has attracted intensive interest due to the fast development of portable electronics. In this work the disk-structured tribo... Harvesting mechanical energy from our surroundings to acquire a steady and high power output has attracted intensive interest due to the fast development of portable electronics. In this work the disk-structured triboelectric nanogenerator (TENG) was prepared based on the mature printed drcuit board (PCB) technology and the composite structure for effectively improving the utilization in space. A narrow grating of 1~ was designed to produce high output. Operated at a rotation rate of 1,000 rpm, the TENG produces a high output power density of 267 mW/cm2 (total power output of 25.7 W) at a matched load of 0.93 MfZ After introducing a transformer, the output power can be managed so that it can be directly used to charge a battery for a smart phone. With the PCB production technology, fabrication of high performance TENG at low cost and large-scale becomes feasible. 展开更多
关键词 triboelectric nanogenerator(TENG) printed circuit board (PCB) output power TRANSFORMER
原文传递
Low-field NMR micro coils based on printed circuit board technology 被引量:1
5
作者 WU WeiPing LU RongSheng +2 位作者 ZHOU XinLong ZHANG YunYi NI ZhongHua 《Science China(Technological Sciences)》 SCIE EI CAS 2014年第10期2082-2088,共7页
Radiofrequency coil is one of the most important components for a nuclear magnetic resonance(NMR)instrument.In this article,some planar micro coils with an inner diameter of 2 mm and number of turns that varied from 1... Radiofrequency coil is one of the most important components for a nuclear magnetic resonance(NMR)instrument.In this article,some planar micro coils with an inner diameter of 2 mm and number of turns that varied from 1 to 11 were investigated based on the printed circuit board(PCB)technology.The electrical characterization of micro coils show that self-resonant frequencies are larger than 200 MHz.Then,an NMR measurement platform with a static magnetic field of 0.66 T was constructed and the signal to noise ratio(SNR)values of the NMR were analyzed.It was found that the SNR is optimal when the turn number of the micro coils is six and the excitation time of a 90°pulse is 0.8?s.Finally,we used the micro coil with six turns to study the transverse relaxation rate of copper sulfate pentahydrate aqueous solution with different concentrations.It was found that the transverse relaxation rate is proportional to the solution concentration.Results from the micro coil were verified by measurements using a Bruker Minispec MQ60. 展开更多
关键词 printed circuit board planar micro coil low-field nuclear magnetic resonance signal to noise ratio transverse relaxation rate
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部