共查询到19条相似文献,搜索用时 109 毫秒
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通过研究时域天线设计的思路和注意事项,提出了由小型微带天线入手进行小型超宽带天线设计的想法,通过扩展微带天线的带宽实现超宽带天线的设计。在具体操作前先对影响天线带看的因素进行了分析,提出天线长宽比对带宽的影响,然后通过对不同长宽比的天线进行计算机仿真分析和总结,证明了结论,最后根据结论初步设计出一个具有良好带宽、方向性和增益的小型超宽带天线,并对其进行了性能仿真。 相似文献
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一种基于微带槽天线的带阻性UWB天线的研究 总被引:1,自引:1,他引:0
提出了一种新颖的小型平面超宽带天线。该天线由微带槽天线的基本结构变形而来,为获得超宽带的频率特性,设计时馈电微带采用了圆弧形调谐枝节,金属底板的开槽设计成对称多边形之后通过数值计算获得最佳的天线几何尺寸。通过HFSS仿真和测试设计了一种频率覆盖3.1~10.6 GHz的超宽带UWB天线,其对包含在超宽带频段范围内的民用频率范围有一定的滤除作用,结构简单并且驻波特性良好,方向图具有准全向性。 相似文献
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随着对超宽带平面天线的研究和广泛应用,在超宽带天线中实现对其他无线通信设备特别是WLAN设备的干扰抑制成为近年来的研究热点。介绍了陷波特性超宽带天线的技术背景,对近几年国内外关于陷波超宽带天线的最新研究成果进行了分析总结,研究成果对超宽带天线的设计和频带的抑制具有一定的指导作用。最后对无线通信中超宽带天线的发展趋势进行了展望。 相似文献
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张勇 《电子信息对抗技术》2017,32(1)
提出了一种小型超宽带(UWB)平面天线阵列并进行了优化.首先设计了两个不同的UWB天线单元方案:印刷天线-Vivaldi天线、平板天线-平面螺旋天线,并通过对比选择螺旋天线单元作为组阵单元.对该天线阵列的回波损耗、3D辐射图、方向图进行了仿真计算和设计.结果该天线阵列在6 ~ 10GHz内具有较好的定向辐射特性,增益达到15dB.进一步优化单元空间分布结构,使天线在相应频段内具有更佳的方向性.通过调整各个馈源的相位差,在不失去增益的同时,可以控制波束的偏转. 相似文献
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首先提出了一种小型平面超宽带天线的设计。天线采用FR4印刷电路板制作,由共面
的叉形辐射单元和多边形缝隙构成,整体尺寸为30 mm×28 mm×0.8 mm。采用
HFSS软件对天线进行了优化设计和参数分析。然后,通过在叉形辐射单元增加微带开路枝节
并且在地板开一对倒L形细裂缝的办法,设计了组合陷波结构的超宽带天线。实验表明:组
合陷波结构天线在51~5.9 GHz阻带内,回波损耗的最大值达-1.5 dB,与常规的
单陷波结构超宽带平面天线相比较,其回波损耗频率曲线更为陡峭,从而能更有效地提高
超宽带通信系统抑制无线局域网设备所带来干扰的能力。 相似文献
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为了适应超宽带通信应用的需求,设计了一种新型的超宽带天线.该天线以平面正方形单极微带天线为原型,通过数值计算获得天线的最佳几何尺寸,并对制作的实际样品进行了天线的反射特性、多天线间的互耦特性测试.研究结果表明该天线具有良好的超宽带特性,适合超宽带通信产品的应用. 相似文献
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设计了一种小型三陷波平面超宽带天线,通过在天线的辐射贴片上加载U形缝隙、在接地板上开一对对称的L形缝隙和引入寄生条带,使得天线在3.2~3.6GHz、3.7~4.3GHz和5.3~6GHz频段内实现频率阻断。利用仿真软件研究了U形缝隙、L形缝隙和寄生条带对陷波特性的影响,并对所设计的超宽带天线进行了制作和测量。结果显示,该天线在工作频段2.8~10.6GHz内具有良好的辐射方向特性,能广泛应用于超宽带系统。 相似文献
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V.A. ShameenaS. Mridula Anju PradeepSarah Jacob A.O. LindoP. Mohanan 《AEUE-International Journal of Electronics and Communications》2012,66(3):189-194
A printed compact coplanar waveguide fed triangular slot antenna for ultra wide band (UWB) communication systems is presented. The antenna comprises of a triangular slot loaded ground plane with a T shaped strip radiator to enhance the bandwidth and radiation. This compact antenna has a dimension of 26 mm × 26 mm when printed on a substrate of dielectric constant 4.4 and thickness 1.6 mm. Design equations are implemented and validated for different substrates. The pulse distortion is insignificant and is verified by the measured antenna performance with high signal fidelity and virtually steady group delay. The simulation and experiment reveal that the proposed antenna exhibits good impedance match, stable radiation patterns and constant gain and group delay over the entire operating band. 相似文献
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对陷波特性超宽带(UWB)天线的研究现状进行了分析总结.介绍了陷波特性超宽带天线的技术背景,分别对近年来陷波功能超宽带天线的设计进行了详细的评论,最后展望了陷波特性超宽带天线的未来发展方向. 相似文献
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K. Siakavara 《International Journal of Electronics》2013,100(3):277-283
The multi-band frequency operation is a property that antennas, utilized in several communication systems, have to exhibit. In this paper, a compact printed antenna for Global Positioning System (GPS) and terrestrial radio services is presented. It is composed via the union of four inverse Koch fractal patches. The antenna operates in three frequency ranges (GPS, Digital Cellular System-DCS1800 and 2.7?GHz). It is driven by two feed probes, directly matched to the radiating element without any matching network to be necessary. At GPS, the antenna is capable of generating a circularly polarized field, with maximum strength at the broadside direction. At the other two frequencies, the field is linearly polarized and the maximum of radiation appears apart from the broadside. Two pins, embedded in the structure, are activated at DCS and at 2.7?GHz in order to enhance the performance of the antenna. 相似文献
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Soheil Radiom Majid Baghaei-Nejad Hadi Aliakbarian Li-Rong Zheng Guy A. E. Vandenbosch George Gielen 《Wireless Personal Communications》2013,71(4):2913-2935
In this paper, a co-design methodology and the effect of antenna miniaturization in an impulse UWB system/transceiver is presented. Modified small-size printed tapered monopole antennas (PTMA) are designed in different scaling sizes. In order to evaluate the performance and functionality of these antennas, the effect of each antenna is studied in a given impulse UWB system. The UWB system includes an impulse UWB transmitter and two kinds of UWB receivers are considered, one based on correlation detection and one on energy detection schemes. A tunable low-power Impulse UWB transmitter is designed and the benefit of co-designing it with the PTMA antenna is investigated for the 3.1–10.6 GHz band. A comparison is given between a 50 $\Omega $ design and a co-designed version. Our antenna/transceiver co-design methodology shows improvement in both transmitter efficiency and whole system performance. The simulation results show that the PTMA antenna and its miniaturized geometries are suitable for UWB applications. 相似文献