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为满足船载测控设备海上标定、校验跟踪参数的需要, 一般采用放信标球的方式,同时为克服信标球在空中随气球旋转给跟踪带来的不利影响,信标天线必须采用组阵方式。由于信标球是一个小球体,安装位置受限,组阵信标天线在满足天线指标的情况下,必须满足小型化和良好互扰性要求。文中设计了一个小型化X频段天线,通过分析比较,最终采用短单极子结构,在垂直方向具有全向性。通过HFSS的仿真和参数参数优化,得到了结构参数和性能参数。通过单个天线性能仿真,以及天线组阵仿真的结果可知,所设计的天线指标上完全满足使用要求,具有天线结构紧凑、易于加工的优点;同时,本文所采用的建模、仿真方法、对其它相关天线设计也有一定的参考价值。 相似文献
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给出了一个新颖的三频工作的单极子天线,并可以应用于无线局域网。这个天线由对称结构和地板组成,它们分别印刷在介电常数为4.4、厚度为1.6 mm 的FR4 介质板的两面,并且采用微带线的馈电方式。这个天线有着小型化尺寸26 mm×20 mm×1.6 mm。测量结果显示,低频和高频的-10 dB 阻抗带宽分别为2.3-2.5 GHz 和4.7-6.8 GHz;这个
带宽覆盖了2.4/5.2/5.8 GHz 无线局域网工作频段。同时得到了较好的全向方向图。这个天线的低频和高频的平均增益分别为2dBi 和3.7dBi。 相似文献
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A simple and compact microstrip-fed Ultra WideBand(UWB) printed monopole antenna with band-notched characteristic is proposed in this paper.The antenna is composed of a square ring with a small strip bar,so that the antenna occupies about 7.69 GHz bandwidth covering 3.11~10.8 GHz with expected band rejection from 5.12 GHz to 5.87 GHz.A quasi-omnidirectional and quasi-sym-metrical radiation pattern is also obtained.This kind of band-notched UWB antenna requires no ex-ternal filters and thus greatly simplifie... 相似文献
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梯形弯折线单极子天线的谐振特性 总被引:1,自引:0,他引:1
基于矩量法数值方法,研究了由梯形弯折线构成的单极子天线的谐振特性。着重于分析在天线高度和宽度都有明确尺寸要求条件下,天线输入参数与梯形弯折线弯折次数的关系以及与弯折角的关系。结果表明,弯折角的改变对天线谐振特性具有很强的调节作用,恰当地选择弯折角可以有效地改变天线的谐振频率与带宽,提高天线的辐射能力和匹配性能。 相似文献
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A high gain dual-band printed antenna is proposed for LTE base stations applications. The established 60 × 60 mm2 broadband antenna structure is composed of two perpendicular U-shaped and L-shaped monopole antennas which are located vertically on ground plane printed on 1.6 mm thick FR4 substrate. A metallized wall is connected to the substrate which forms a corner reflector. A coaxial cable at the common center of the monopoles is adopted to excite the antenna. Wise implementation of the conductive elements and finely tuning of the monopoles dimensions yield the excitation of two resonances and dual band operation achievement. The presented antenna achieves bandwidths of 1.61–1.86 GHz and 2.25–2.45 GHz suitable for LTE applications. Stable radiation pattern, small size, cost effective fabrication, and high peak gain values of 10 dBi and 9.5 dBi at two operating bands are the prominent features of the proposed antenna topology. 相似文献