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一种毫米波宽带电磁偶极子天线研究
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作者 王兵 王志愿 +1 位作者 何彦琦 赵雪志 《空军预警学院学报》 2021年第1期13-15,19,共4页
为满足毫米波无线通信系统的需求,研制了一种宽带毫米波电磁偶极子天线.该天线采用基片集成波导缝隙耦合馈电,抑制了表面波辐射,降低了传输损耗.采用电磁仿真软件HFSS进行建模仿真,分析了辐射贴片尺寸、馈电缝隙宽度和金属通孔半径对天... 为满足毫米波无线通信系统的需求,研制了一种宽带毫米波电磁偶极子天线.该天线采用基片集成波导缝隙耦合馈电,抑制了表面波辐射,降低了传输损耗.采用电磁仿真软件HFSS进行建模仿真,分析了辐射贴片尺寸、馈电缝隙宽度和金属通孔半径对天线反射系数和辐射特性的影响,仿真给出了天线在28 GHz和32 GHz的E面和H面主极化和交叉极化方向图特性.仿真结果表明,天线的-10 dB阻抗带宽为25.0~33.4 GHz,且工作频带内增益平稳,方向图稳定,E面和H面辐射方向图具有低交叉极化特性.该天线的宽带和易集成特性使其在毫米波无线通信系统中具有很好的应用前景. 展开更多
关键词 基片集成波导 毫米波 宽带天线 电磁偶极子
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一种紧凑型双极化电磁偶极子天线设计 被引量:9
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作者 余文胜 张忠祥 +1 位作者 吴先良 张奥运 《电子元件与材料》 CAS CSCD 北大核心 2018年第4期79-83,共5页
文章提出了一种紧凑型双极化电磁偶极子天线。通过改变天线平面偶极子辐射表面的形状,延长表面辐射电流路径,从而实现了天线的小型化。利用两个线性渐变的Γ型馈线对天线进行耦合馈电,可以有效地展宽天线的阻抗带宽。实测结果表明,天线... 文章提出了一种紧凑型双极化电磁偶极子天线。通过改变天线平面偶极子辐射表面的形状,延长表面辐射电流路径,从而实现了天线的小型化。利用两个线性渐变的Γ型馈线对天线进行耦合馈电,可以有效地展宽天线的阻抗带宽。实测结果表明,天线在1.63~2.78 GHz频带内回波损耗小于–15 dB,天线端口隔离度在对应频带内低于–25 dB,并且获得了稳定的增益。所设计天线具有良好的单向辐射特性。与传统天线相比具有结构简单、紧凑、尺寸小等特点,能够应用于无线通信系统中,也可以作为基站天线的一个单元来使用。 展开更多
关键词 宽带 小型化 双极化 单向辐射 Γ型馈线 电磁偶极子天线
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一款面向5G微基站的双频双极化电磁偶极子天线的设计与分析 被引量:2
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作者 忻伶怡 周雪芳 +3 位作者 胡淼 毕美华 杨国伟 王天枢 《电波科学学报》 CSCD 北大核心 2021年第5期715-720,729,共7页
小型化是进行5G微基站天线设计的重要考虑因素,文中设计了一款适用于5G微基站的电磁偶极子天线.天线由一对正交放置的单极化电磁偶极子、一对交叉放置的渐变式Γ形馈电线、一个圆形寄生贴片和一块正方形反射板组成,工作频段为2.50~3.62 ... 小型化是进行5G微基站天线设计的重要考虑因素,文中设计了一款适用于5G微基站的电磁偶极子天线.天线由一对正交放置的单极化电磁偶极子、一对交叉放置的渐变式Γ形馈电线、一个圆形寄生贴片和一块正方形反射板组成,工作频段为2.50~3.62 GHz和4.8~5.0 GHz,能够覆盖工信部规定的5G的全部中频段.在工作频带内,天线的输入回波损耗小于-10 dB;端口隔离度在低频段小于-25 dB,在高频段小于-42 dB;仿真平均增益在高、低频部分分别为5.57 dBi和9.84 dBi.该天线能够实现双频段和双极化,可以作为小型化微基站天线设计的参考,同时为5G天线的商用化提供参考. 展开更多
关键词 双频带天线 双极化 电磁偶极子天线 5G微基站 天线增益
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面向5G微基站的双频双极化电磁偶极子天线设计 被引量:5
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作者 祝聪聪 王斌 +1 位作者 廖晨阳 苏东 《电波科学学报》 EI CSCD 北大核心 2020年第5期769-775,共7页
文中提出并设计了一款应用于5G微基站的双频双极化电磁偶极子天线,工作带宽完整覆盖了长期演进(long term evolution,LTE)技术的主要频段和5G的全部中频段.该天线首先采用正交放置的渐变式Γ形馈电线对两个交叉放置的电磁偶极子馈电实... 文中提出并设计了一款应用于5G微基站的双频双极化电磁偶极子天线,工作带宽完整覆盖了长期演进(long term evolution,LTE)技术的主要频段和5G的全部中频段.该天线首先采用正交放置的渐变式Γ形馈电线对两个交叉放置的电磁偶极子馈电实现双频双极化,随后通过在电偶极子上添加H形缝隙有效扩展了低频段的带宽,最后创新性地引进具有电容性质的圆形寄生贴片将高频频点降低.此外,利用一款添加金属围栏的反射板来改善天线增益和辐射方向图的稳定性.测试结果表明:该天线S 11,22<-10 dB的阻抗带宽为58.2%(2.11~3.84 GHz)和8.9%(4.72~5.16 GHz),端口隔离度(|S 12|)高于25 dB,双频段内的平均增益分别为8.7 dBi和7.2 dBi;天线E面的半功率波瓣宽度在整个工作频带内的变化为61°±6°,交叉极化比高于20 dB.仿真与测试结果达到了良好的一致性.该天线结构简单、性能优良,可以作为LTE/5G室内基站天线的良好的候选. 展开更多
关键词 电磁偶极子天线 5G微基站 双频段 双极化 寄生贴片
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新型超宽带双极化电磁偶极子天线 被引量:2
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作者 何彬 陈星 《太赫兹科学与电子信息学报》 北大核心 2019年第6期1023-1026,共4页
设计了一款新型的超宽带双极化电磁偶极子天线。采用阶梯型馈电结构代替传统电磁偶极子的Γ形馈电结构,半椭圆电偶极子代替传统矩形电偶极子,从而获得了更宽的阻抗带宽。对该天线加工制作了天线样品并进行了测试,仿真和测试吻合良好。... 设计了一款新型的超宽带双极化电磁偶极子天线。采用阶梯型馈电结构代替传统电磁偶极子的Γ形馈电结构,半椭圆电偶极子代替传统矩形电偶极子,从而获得了更宽的阻抗带宽。对该天线加工制作了天线样品并进行了测试,仿真和测试吻合良好。该天线的2个极化馈电端口阻抗带宽(驻波比SWR<2)分别达到90.8%(2.06~5.37 GHz)和84.4%(2.08~5.12 GHz);并在整个工作频段范围内,该天线呈现良好的定向辐射特性和稳定增益,2个馈电端口增益分别为(8.6±0.8)dBi和(8.85±0.85)dBi。 展开更多
关键词 超宽带 电磁偶极子 双极化
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双极化高增益电磁偶极子天线的设计 被引量:1
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作者 肖阳 陈凯亚 《通信技术》 2020年第12期3102-3107,共6页
在基于抛物反射面的射电望远镜应用中,组成相控阵馈源阵列的单元天线应具有高增益、良好的方向图等化性以及双极化可实现等特点。通过加载八单元双层“田”字形左手材料,设计了一款工作于L波段的具有良好等化性的双极化高增益电磁偶极... 在基于抛物反射面的射电望远镜应用中,组成相控阵馈源阵列的单元天线应具有高增益、良好的方向图等化性以及双极化可实现等特点。通过加载八单元双层“田”字形左手材料,设计了一款工作于L波段的具有良好等化性的双极化高增益电磁偶极子天线。仿真结果表明,该天线增益达到10.3dB,极化隔离度优于-30dB,交叉极化比大于28dB。该天线可用于构成馈源阵列,提升射电望远镜的视场性能。 展开更多
关键词 电磁偶极子天线 高增益 左手材料 双极化 交叉极化
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一种5G宽频双极化电磁偶极子天线设计
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作者 刘小琴 史红蓓 宋玉玺 《电信快报(网络与通信)》 2020年第2期36-39,共4页
提出一种用于5G(第五代移动通信系统)的宽带双极化电磁偶极子天线单元。使用电磁仿真软件HFSS进行建模仿真,分析垂直短路高度H和馈电微带线宽度W对双极化天线反射系数和隔离度性能影响,仿真给出天线3.5 GHz和4.8 GHz水平面和垂直面主极... 提出一种用于5G(第五代移动通信系统)的宽带双极化电磁偶极子天线单元。使用电磁仿真软件HFSS进行建模仿真,分析垂直短路高度H和馈电微带线宽度W对双极化天线反射系数和隔离度性能影响,仿真给出天线3.5 GHz和4.8 GHz水平面和垂直面主极化和交叉极化方向图特性。仿真标明,天线在3.2~5 GHz带宽内S参数性能和辐射特性满足要求。 展开更多
关键词 5G天线 双极化 电磁偶极子 宽频天线
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一种双频定向偶极子天线设计 被引量:1
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作者 魏倩倩 焦永昌 +1 位作者 杨磊 渠芳芳 《微波学报》 CSCD 北大核心 2016年第S1期180-183,共4页
设计了一款双频宽带定向辐射天线,该天线以最基本电磁偶极子为基本模型,采用Г型金属探针进行馈电,通过增加金属反射板实现定向辐射,并拓展低频带宽实现双频宽带。根据仿真结果,对天线模型进行了加工并测试。仿真和测试结果表明,天线在0... 设计了一款双频宽带定向辐射天线,该天线以最基本电磁偶极子为基本模型,采用Г型金属探针进行馈电,通过增加金属反射板实现定向辐射,并拓展低频带宽实现双频宽带。根据仿真结果,对天线模型进行了加工并测试。仿真和测试结果表明,天线在0.75~0.98GHz及1.6~2.77GHz频段上反射系数小于-10d B,同时在0.75~0.98GHz增益大于7d Bi,1.6~2.77GHz增益大于6d Bi。该天线具有多频带、定向辐射等优点,在无线通信系统中可以被广泛使用。 展开更多
关键词 双频带天线 定向辐射天线 电磁偶极子天线 Г型金属探针
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Lorentz力矩及其张量特性 被引量:2
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作者 李双九 聂金柱 赵纪广 《河北大学学报(自然科学版)》 CAS 2000年第3期243-247,共5页
用对偶变换求出了运动电磁偶极子承受的Lorentz力矩 ,它不仅包括电场与电矩和磁场与磁矩耦合的本征力矩 ,还包括磁场与电矩和电场与磁矩耦合的交叉力矩.该力矩的协变形式是二阶反对称张量 ,其变换性质与非张量方法和Trouton -Noble零实... 用对偶变换求出了运动电磁偶极子承受的Lorentz力矩 ,它不仅包括电场与电矩和磁场与磁矩耦合的本征力矩 ,还包括磁场与电矩和电场与磁矩耦合的交叉力矩.该力矩的协变形式是二阶反对称张量 ,其变换性质与非张量方法和Trouton -Noble零实验的结果完全相符. 展开更多
关键词 狭义相对论 电磁 Lorentz力矩 电磁偶极子
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介质极化和磁化的八元数理论 被引量:3
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作者 王洪吉 《商丘师范学院学报》 CAS 2003年第2期25-27,共3页
利用八元数方法研究介质的极化和磁化,给出了一些新的极化和磁化方程,揭示了极化和磁化的关 系.
关键词 电磁 介质极化 介质磁化 八元数理论 八元数方法 极化磁化波 电磁偶极子
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一种生命探测装备的超宽带天线设计
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作者 杨传法 刘晴晴 +3 位作者 张献生 刘陵玉 孙中琳 常天英 《山东科学》 CAS 2017年第3期98-102,109,共6页
通过Ansoft HFSS电磁软件对天线模型参数进行仿真和优化,设计了一款新型电磁偶极子宽带天线。该天线阻抗带宽2~4GHz、前后比达10 d B,体积小。测试结果表明其性能指标满足设计需求,并已应用到生命探测装备中。
关键词 超宽带 探测定位 电磁偶极子
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用于5G通信系统的28 GHz全向圆极化天线 被引量:2
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作者 邢海龙 周玉洁 陈婷婷 《固体电子学研究与进展》 CAS 北大核心 2019年第6期425-430,462,共7页
提出了一种用于5G通信系统的全向圆极化(Omnidirectional circular polarization,OCP)天线。通过将电偶极子元件系统地集成为紧凑的圆角长方体结构来实现全向圆极化辐射,电偶极子元件以平行的方式并且以适当的相位差辐射。天线设计并制... 提出了一种用于5G通信系统的全向圆极化(Omnidirectional circular polarization,OCP)天线。通过将电偶极子元件系统地集成为紧凑的圆角长方体结构来实现全向圆极化辐射,电偶极子元件以平行的方式并且以适当的相位差辐射。天线设计并制造在Rogers 5880基板上,中心频率为28.2GHz,工作频段为27.3~30.6GHz,3dB轴比带宽覆盖工作频段。天线能够实现良好的OCP辐射模式,测得的峰值增益为1.8dBi左右。 展开更多
关键词 全向圆极化天线 5G应用 电磁偶极子
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Comparison of the time-domain electromagnetic field from an infinitesimal point charge and dipole source 被引量:3
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作者 周楠楠 薛国强 王贺元 《Applied Geophysics》 SCIE CSCD 2013年第3期349-356,359,共9页
An electromagnetic field is generated through the accelerating movement of two equal but opposite charges of a single dipole. An electromagnetic field can also be generated by a time-varying infinitesimal point charge... An electromagnetic field is generated through the accelerating movement of two equal but opposite charges of a single dipole. An electromagnetic field can also be generated by a time-varying infinitesimal point charge. In this study, a comparison between the electromagnetic fields of an infinitesimal point charge and a dipole has been presented. First, the time-domain potential function of a point source in a 3D conductive medium is derived. Then the electric and magnetic fields in a 3D homogeneous lossless space are derived via the relation between the potential and field. The field differences between the infinitesimal point charge and the dipole in the step-off time, far-source, and near-source zones are analyzed, and the accuracy of the solutions from these sources is investigated. It is also shown that the field of the infinitesimal point charge in the near-source zone is different from that of the dipole, whereas the far-source zone fields of these two sources are identical. The comparison of real and simulated data shows that the infinitesimal point charge represents the real source better than the divole source. 展开更多
关键词 Infinitesimal point charge dipole source TIME-DOMAIN electromagnetic response near-source zone.
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高前后比低剖面轻型天线的设计
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作者 王超 《电子制作》 2018年第3期47-48,共2页
本文基于电偶极子与磁偶极子互补的原理,设计了一种高性能天线。该天线实现了43.8%的带宽(1.825GHz至2.850GHz,S11<-10d.B),8.29dBi的增益,超过29dB的辐射前后比。该天线的剖面高度仅为0.19λ_0(λ_0为天线中心频率对应的波长),天线... 本文基于电偶极子与磁偶极子互补的原理,设计了一种高性能天线。该天线实现了43.8%的带宽(1.825GHz至2.850GHz,S11<-10d.B),8.29dBi的增益,超过29dB的辐射前后比。该天线的剖面高度仅为0.19λ_0(λ_0为天线中心频率对应的波长),天线的增益在整个工作频段内具有稳定性。 展开更多
关键词 电磁偶极子 低剖面 轻型天线
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Effects of Uncertainties in the Position and Orientation of Both the Transmitter and Receivers on Marine Controlled-Source Electromagnetic Data 被引量:3
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作者 XU Zhenhuan LIU Ying LI Yuguo 《Journal of Ocean University of China》 SCIE CAS 2016年第1期83-92,共10页
Simulation and interpretation of marine controlled-source electromagnetic(CSEM) data often approximate the transmitter source as an ideal horizontal electric dipole(HED) and assume that the receivers are located on a ... Simulation and interpretation of marine controlled-source electromagnetic(CSEM) data often approximate the transmitter source as an ideal horizontal electric dipole(HED) and assume that the receivers are located on a flat seabed.Actually,however,the transmitter dipole source will be rotated,tilted and deviated from the survey profile due to ocean currents.And free-fall receivers may be also rotated to some arbitrary horizontal orientation and located on sloping seafloor.In this paper,we investigate the effects of uncertainties in the transmitter tilt,transmitter rotation and transmitter deviation from the survey profile as well as in the receiver's location and orientation on marine CSEM data.The model study shows that the uncertainties of all position and orientation parameters of both the transmitter and receivers can propagate into observed data uncertainties,but to a different extent.In interpreting marine data,field data uncertainties caused by the position and orientation uncertainties of both the transmitter and receivers need to be taken into account. 展开更多
关键词 electromagnetic uncertainty in position and orientations data certainty marine CSEM
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IMPROVEMENT OF EXPRESSION FOR EXCITATION BY AN ELECTRIC DIPOLE IN GTEM CELL
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作者 Ren Liehui Chen Zhiyu (institute of Electronics, Chinese Academy of Sciences, Beijing 100080) 《Journal of Electronics(China)》 2002年第1期94-98,共5页
On the basis of Wilson's work in which the vertical electric dipole is centrally located in GHz Transverse ElectroMagnetic (GTEM) cell, we deduce the expression for the field distribution excited by an electric di... On the basis of Wilson's work in which the vertical electric dipole is centrally located in GHz Transverse ElectroMagnetic (GTEM) cell, we deduce the expression for the field distribution excited by an electric dipole in the case that the dipole is not centrally located. It will be useful for EMC measurements using GTEM cell. 展开更多
关键词 Excitation field Electric dipole GTEM cell
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Electromagnetic fields from a horizontal electrical dipole buried in ocean 被引量:1
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作者 JIA Dingyu WENG Aihua LIU Yunhe YIN Changchun 《Global Geology》 2012年第2期176-181,共6页
Marine controlled source electromagnetic signal could be used in mineral resource exploration,reservoir appraisal and communicative technique in ocean. It's necessary to study the electromagnetic generated by MCSE... Marine controlled source electromagnetic signal could be used in mineral resource exploration,reservoir appraisal and communicative technique in ocean. It's necessary to study the electromagnetic generated by MCSEM. The propagation of the electromagnetic fields from a controlled source in the marine environment was studied with virtual interface method combined with discrete complex image method. Transmitter of finite length current source is approximated by dipole (HED) . A three-layered model is accepted,with sea water as intermediate conductive layer under air and a relatively high resistive seabed as basement,possibly containing a hydrogen layer of higher resistivity. The electromagnetic fields in whole space thus computed show that: (1) the spatial distribution of field component depends on its type; (2) inline Ex component is more sensitive to reservoir layer than that in broadside; (3) The airwave affects marine electromagnetic (MEM) exploration when sea water is relatively shallow; in the case of deep water MEM exploration,the airwave influence could be neglected; and (4) an appropriate frequency should be selected in order to balance the signal strength and electromagnetic induction effect. 展开更多
关键词 electromagnetic propagation 1 D model horizontal electrical dipole marine electromagnetic method
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Tunable left-hand characteristics in multi-nested square-split-ring enabled metamaterials
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作者 ABDULKARIM Yadgar.I DENG Lian-wen +5 位作者 YANG Jun-liang COLAK Sule KARAASLAN Muharrem HUANG Sheng-xiang HE Long-hui LUO Heng 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第4期1235-1246,共12页
Left-hand materials have drawn increasing attention from many disciplines and found widespread application, especially in microwave engineering. A sandwiched metamaterial consisting of multi-nested square-split-ring r... Left-hand materials have drawn increasing attention from many disciplines and found widespread application, especially in microwave engineering. A sandwiched metamaterial consisting of multi-nested square-split-ring resonators on the top side and a set of wires on the back side is proposed. Scattering parameters are retrieved by high-frequency structure simulator(HFSS) software based on the finite element method. Effects of square-split-ring number on the left-hand characteristics containing negative values of permittivity, permeability, and refractive index have been intensively investigated. Simulated results show that obvious resonant left-hand characteristics could be observed within 8-18 GHz, and the resonant frequency counts are inclined to be in direct proportion to the square-split-ring number over 8-18 GHz. Besides, the proposed sandwiched metamaterial with three square-split-ring resonators and three wires presents the widest frequency band of left-hand characteristics in a range of 8-18 GHz. Further, electromagnetic field distributions demonstrated that the induced magnetic dipole dominates the resonant absorption. The multi-peak resonance characteristics of square-split-ring resonant structure are considered to be a promising candidate for selective-frequency absorption or modulation toward microwave frequency band. 展开更多
关键词 METAMATERIAL square-split-ring negative permittivity induced magnetic dipole
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Research on Distribution of Electric Dipole Field based on Applied Mathematics and Computer
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作者 Lingzhi YANG Rumin LIU Haiming LIU 《International Journal of Technology Management》 2015年第4期107-109,共3页
The paper analyze the polarization of study dielectric that produced field by dipole, medium field plays an important role in electromagnetic wave radiation. The electric field expression for electric dipole electric ... The paper analyze the polarization of study dielectric that produced field by dipole, medium field plays an important role in electromagnetic wave radiation. The electric field expression for electric dipole electric field distribution in ordinary textbooks only give a special direction, This paper introduces in detail the formula of the electric dipole in the space of an arbitrary point excitation electric field, and use computer sottware to simulate the distribution pattern of electric dipole, and gives some typical figures for reference. 展开更多
关键词 Conducting spheres Dipole moment Image dipole method Interaction force
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Spin electromagnetic field and dipole:A localized and quantized field
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作者 FENG ZhengHe 《Chinese Science Bulletin》 SCIE EI CAS 2011年第14期1461-1470,共10页
This paper investigates the structure of a spin electromagnetic (EM) field and its various physical properties.A spin EM field is an intrinsic mode of free space,which satisfies the spin equations derived from Maxwell... This paper investigates the structure of a spin electromagnetic (EM) field and its various physical properties.A spin EM field is an intrinsic mode of free space,which satisfies the spin equations derived from Maxwell equations.A spin mode has two basic properties:the spin along its axis and the localization of electromagnetic field.The source and EM structure of this electric and magnetic mode are described in detail in this paper.The distributed charge and current of a spin mode can be integrated to obtain the electric and magnetic moment,and they can be treated as the electromagnetic dipole.A spin mode possesses both wave and particle properties:a wave number,angular frequency and characteristic speed are its wave parameters;an intrinsic radius,energy and angular momentum are its dynamic parameters.The former is analogous to an EM resonant mode;the latter is similar to the behavior of a particle with intrinsic spin.There are two kinds of electric modes present,one can be expressed through a pair of charges,and the other can be expressed by a magnetic current.They both have the same electric moment,but have different divergence properties. 展开更多
关键词 旋转模式 电磁偶极子 电磁 本地化 麦克斯韦方程组 量子场 物理性质 化学性质
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