一种宽频带缝隙型手机天线设计

针对超薄多频带手机的需要,提出一款新型印刷缝隙型手机天线。天线印刷在0.8 mm厚FR-4电路板上,地面开有2个缝隙,其中1个为矩形,另外1个为矩形与圆形组合形式。馈电结构采用50 Ω微带线与一圆形贴片、一矩形带线组合构成倒L状。馈电线的弯折部分在地上的投影落于缝隙的内部,天线在电路板上占用的区域仅限于缝隙内部,保持了天线的小型化。此结构缝隙天线能够达到宽带匹配,测试的-6 dB带宽为0.695~0.805 GHz,1.5~3.2 GHz,4~15 GHz,能够覆盖LTE700,DCS1800,PCS1900,UMTS,LTE2300,LTE2500,全球定位系统(GPS),无线局域网(WLAN)以及超宽带通信(UWB)的高频段。     

自构天线

本文介绍了一种称为自构天线(SSA)的新型天线。SSA能够根据环境的变化而改变其电气形状。这一特性使其适用于许多传统天线比较困难的场合。文中介绍了SSA的基本工作原理。着重介绍了许多潜在的应用，还提供了一种简单天线模型的设计细节。本文还对能够分析SSA的一些计算机工其作了说明，并给出了SSA的数值分析和实验结果。     

改进型vivaldi天线

常规vivaldi天线存在后向辐射大,主辐射方向增益低的缺点.通过优化常规vivaldi天线贴片形式的方法,改变天线表面的电流分布,得到其改进形式-兔耳形vivaldi天线.对改进型vivaldi天线的电性能进行了分析,设计并制作了一付工作在6～18 GHz的改进型vivaldi天线,与常规vivaldi天线相比,天线增益在整个频带内均有显著的提高.     

相控阵天线单元研究

文章研究了一种新型的、带有高阻抗环检测天线的印刷偶极子相控阵天线单元。其特点是可利用检测天线与单元天线之间的传输关系，准确反映单元天线的动态特性。这种天线的应用对研究相控阵天线的实时检测问题十分有用     

用于天线RCS减缩的分形微带贴片天线

本文给出一种分形微带天线在天线雷达散射截面(RCS)减缩中应用的示例.分形结构具有独特的空间填充性能,利用该性能可以探索分形天线在天线RCS减缩中的应用.设计出的分形天线与常规天线的辐射性能进行了比较,可以看出分形天线基本保持了原辐射性能.同时比较了两者的散射性能,可以看出分形天线有一定的RCS减缩效果.本文的内容对天线隐身有一定的借鉴作用.     

软件天线——智能天线的新发展

具有良好的开放性、可扩展性,能够实现灵活配置的软件天线是智能天线未来发展的目标,在第三代移动通信系统中将占有重要地位。     

矩形微带贴片天线的谐振频率

本文采用有限元法对有短路销钉的可调频薄基片矩形贴片微带天线的谐振频率进行计算,其计算结果与实验结果相当一致,该方法原则上适合于多个短路销钉置于任意位置的情形,可能是处理带短路销钉微带贴片天线的最有效的方法。     

Design of CPW-fed asymmetric slot UWB antenna for wireless application

A compact Ultra-WideBand(UWB) slot antenna is presented in this paper. The slot is modified rectangular in shape and asymmetrically cut in the ground plane. A hexagonal patch with two stepped CoPlanar Waveguide(CPW) feed is used to excite the slot. Wider impedance bandwidth is achieved due to the extra inductive reactance created by the asymmetric slot which neutralizes the capacitive reactance of the hexagonal patch. The measured impedance bandwidth of the proposed antenna is 11.85 GHz(2.9–14.75 GHz). The radiation patterns of the proposed antenna are obtained and found to be omni-directional in H-plane and bi-directional in E-plane.     

人体中心网络微带缝隙天线设计和研究

设计了一款小型微带缝隙天线.通过电磁仿真软件CST的参数优化功能,对微带缝隙天线缝隙的长度、宽度、馈电点等参数进行优化,得到了工作频率为2.45GHz,带宽100 MHz、阻抗匹配良好、辐射效率较高的用于人体中心网络的微带缝隙小型天线,根据仿真设计,制作了天线,测试结果和仿真结果吻合较好.     

一种新型超宽带双陷波平面单极子贴片天线设计

设计一种新型双陷波超宽带单极子贴片天线,辐射贴片为酒杯型天线结构,采用对底部边缘开槽曲流的办法,实现了良好超宽带天线性能。同时对辐射贴片加载了U形和C形缝隙,分别在3.5 GHz和5.5 GHz处产生陷波。利用HFSS软件对所设计天线进行仿真验证,仿真结果与实测结果表明,该天线在超宽带范围内能有效抑制双陷波能力,并且在通带范围有良好辐射和稳定增益特性。其天线尺寸为33 mm×26 mm×0.74 mm,便于集成在电路系统中。     

一种新型超宽带双陷波平面单极子贴片天线设计

设计一种新型双陷波超宽带单极子贴片天线,辐射贴片为酒杯型天线结构,采用对底部边缘开槽曲流的办法,实现了良好超宽带天线性能。同时对辐射贴片加载了U形和C形缝隙,分别在3.5 GHz和5.5 GHz处产生陷波。利用HFSS软件对所设计天线进行仿真验证,仿真结果与实测结果表明,该天线在超宽带范围内能有效抑制双陷波能力,并且在通带范围有良好辐射和稳定增益特性。其天线尺寸为33 mmX26 mmX0.74 mm,便于集成在电路系统中。     

Analysis of W-slot loaded patch antenna for dualband operation

In the present paper W-slot loaded single and two dielectric layers microstrip patch antenna has been analysed using equivalent circuit concept. The antenna shows dual resonance. The resonance frequency of single layer patch is found to be 2.91 GHz and 3.88 GHz which increases for two layers dielectric antenna up to 4.17 GHz and 5.78 GHz respectively. The frequency ratio is found to be 1.33 for single layer patch antenna and 1.38 for two layers patch antenna. In general the frequency ratio is found to depend on slot length, slot width and slot angle. The bandwidth of single layer patch antenna is found to be 1.71% and 1.68% for lower and upper resonance frequency while it increases for two layers up to 5.28% and 2.77%. The theoretical results are compared with the simulated results obtained from IE3D and both are in close agreement.     

Shorting pin loaded dual-band compact rectangular microstrip antenna

Theoretical and experimental investigations carried out on shorted microstrip patch antenna for dual band operation. The investigations were carried out by varying the shorting-pin position from the edge to the centre of the patch; such an antenna provides a frequency tunability range from 0.88?GHz to 1.08?GHz for first resonance and from 2.20?GHz to 2.59?GHz for second resonance. A frequency ratio of about 2.91 to 2.2 for the two operating frequencies is observed. When the shorting-pin position is close to centre or at the centre of the patch, a single resonant frequency is observed. It is also observed that the resonant frequency of the antenna heavily depends upon the thickness of the substrate, dielectric constant of the substrate and radius of the shorting-pin.     

一种新型多频缝隙微带天线的设计

提出了一种新型多频缝隙微带天线,该天线的结构与一般的微带缝隙天线结构类似,通过采用电抗加载与双支节馈电,可灵活控制其多频工作特性;通过大量计算与实验,充分地研究了其输入阻抗特性、辐射与增益特性。计算与实测的数据结果表明,该天线能在2.4～2.5GHz/5.15～5.35GHz/5.725～5.825GHz频段内获得良好的输入特性和辐射特性,因而该设计方法是正确有效的。     

渐变开槽相控阵天线的FDTD分析

对UHF波段无限大开槽阵列天线进行了时域分析,应用Floquet原理对阵列的结构进行区域划分,同时采用时域有限差分法（FDTD）进行数值仿真,研究了作为相控阵天线应用时的频率和空间扫描特性,给出了数值计算结果,得到一些有参考价值的结论。     

一种小型化超宽带MIMO天线设计

提出了一种基于槽天线的小型化、高隔离度的超宽带(Ultra Wideband, UWB)多入多出(Multiple-Input Multiple-Output, MIMO)天线.该MIMO天线由两个槽天线单元构成, 为了增加天线阻抗带宽, 每个槽天线单元由末端带有圆形贴片的微带线和末端为圆形的槽线两部分耦合馈电.采用在地板上开槽和方向图分集方法, 减少地板表面波和空中电磁波影响, 达到提高天线隔离度的目的.数值仿真和实验结果表明:该天线在3.1~11 GHz频段内满足端口反射系数|S₁₁| < -10 dB, 隔离度|S₁₂|在7~11 GHz频段内小于-25 dB, 在3.1~7 GHz频段内小于-16 dB, 并根据仿真和测试S参数计算了包络相关系数.     

Broadband circularly polarised hexagonal slot antenna excited by a tapered microstrip feeder

In this article, a broadband circularly polarised slot antenna fed by a single microstrip line is implemented. The proposed antenna is composed of an unequilateral hexagonal slot to implement circular polarisation and tapered microstrip feeding line to enhance the impedance bandwidth. A conducting reflector is also employed to enhance the antenna gain. The proposed antenna, 60 mm × 60 mm × 18.12 mm in size, was fabricated and tested. The measured??10 dB reflection bandwidth and 3 dB axial ratio bandwidth were 48.9% and 17%, respectively. The measured gain of the fabricated antenna ranged from 5.4 dBi to 6 dBi within an axial ratio bandwidth of 3 dB.