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设计了一种新型的基于非对称共面波导(ACPW)馈电复合左右手传输线(CLRH-TL)的四频段混合小型化天线。天线由非对称共面波导接地面加载互补开口谐振环缝隙、单极子天线终端加载复合左右手传输线单元组成,将常规单极子天线与超材料结构的零阶谐振器天线双模式混合。实测结果表明:天线回波损耗大于10 dB的阻抗带宽分别为1.55~1.65 GHz,2.4~3.7 GHz,5.15~5.36 GHz,5.71~5.89 GHz,通带内具有良好的辐射特性。天线结构简单紧凑,易于集成,可应用于GPS,WLAN和WiMAX无线通信系统中。 相似文献
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针对环境混合能量收集(天线)的小型化设计目标,设计一种基于聚偏氟乙烯(PVDF)压电材料的双频段共面波导(CPW)天线。天线的主要辐射单元为矩形铜皮贴纸,两侧对称的L型铜皮贴纸形成共面波导馈电结构,并作为微扰单元改变天线的表面电流分布,实现双频的设计要求。天线设计并制造在PVDF压电薄膜上,由于压电材料本身所具备的压电特性和高介电常数,该天线可同时收集射频与振动2种能量,天线尺寸得到有效减小。实验结果表明:该天线可同时工作在2.4 GHz和5.8 GHz的常用工业、科学与医学(ISM)频段,峰值增益分别为0.77 dB和2.47 dB。 相似文献
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提出了一种带有寄生贴片的全向印刷天线。该天线采用平行双线串馈的方式,以印刷振子作为辐射单元,通过引入寄生贴片,有效地平衡了水平面各个方向的辐射强度,使得水平面不圆度小于0.5 dB,并且改善了阻抗特性,天线VSWR≤1.5 的带宽达到6.6%。 相似文献
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刘丽珍 《固体电子学研究与进展》2023,(5):408-412
设计了一款小型化窄条形宽带柔性天线,该天线由辐射片和带有短路枝节的共面波导金属地构成,整体尺寸为24.5 mm×5.0 mm×0.1 mm。通过采用带有短路枝节的共面波导金属地、新共面波导结构、两个U型缝隙、馈线倾斜焊接等方法,有效增加了阻抗带宽,且与常规柔性天线相比尺寸减小70%。测试结果表明,天线用于超宽带定位系统中的智能手表时,工作频段覆盖3.27~4.55 GHz,带宽内增益大于2.4 dBi,不圆度小于0.95 dB。 相似文献
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高速磁浮列车毫米波车地通信系统要求其车载天线具有小型化、宽频带、圆极化和辐射扇形波束等特点。为更好地满足这些要求,设计一种中心馈电的小型化波导螺旋阵列天线。该天线馈电系统采用同轴波导中心馈电、4路矩形波导并馈的形式,通过改变馈电波导尺寸、耦合探针长度以及末端采用波导同轴转换器等形式,实现了所有单元的等幅馈电;天线单元由低剖面螺旋天线构成,采用顺序旋转技术改善天线的圆极化性能。利用全波电磁仿真软件设计了一款中心频率为38 GHz的28单元波导螺旋阵列天线,并进行了实验测试。测试结果表明:在37~39 GHz频带范围内,天线驻波比小于1.41,增益大于21.7 dB,轴比小于3.6 dB,俯仰面波瓣宽度为4.5°~4.7°,方位面波瓣宽度为29°~29.7°,满足毫米波车地通信系统车载天线的设计需求。 相似文献
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设计了一种满足WLAN和WiMAX工作所需的小型共面波导馈电的三频带印刷单极子天线单元。该单极子天线的设计采用了在倒锥形单极天线表面开缝和在底层加载枝节的结构,使其获得了小型化和三频带的性能。采用基于共面波导的馈电方式,使天线单元具备宽带匹配、结构简单、制作方便和易与其它无线通信设备集成等优点。仿真和实测结果表明,设计的天线单元在WLAN和WiAMX应用的频段上10dB阻抗带宽分别约为610MHz(2.10~2.71GHz,约25.4%),310MHz(3.48~3.79GHz,约8.9%)和360MHz(4.96~5.32GHz,约7%),增益也都在2dB以上,而且在相应工作频点上辐射方向图全向性较好。该天线能满足WLAN和WiMAX的应用所需,具有较高的工程应用价值。 相似文献
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乔纯鑫汪敏刘贵铭杨孝荣吴文 《微波学报》2023,(1):37-40
本文设计了一种毫米波空馈径向线缝隙阵列(RLSA)天线。首先采用空气波导取代介质波导以降低天线的馈电损耗,接着分析加载辐射缝隙对造成径向线波导的慢波传输效应,以及不同长度的缝隙对引起的不同辐射相位滞后,然后修正各辐射单元之间的径向距离,以使口径面上所有缝隙对单元能够等幅同相地辐射。这一修正避免了栅瓣的产生,在35GHz工作频率和直径为10个波长的圆口径上实现了53.3%的口径效率。之后,放松各单元等相位辐射的要求,进一步减小单元径向间距Sρ,优化口径效率。最终研制出左旋圆极化RLSA天线,峰值增益达到27.71dBic,口径效率为59.8%,3dB增益带宽为8.37%;实测增益为27.51dBic,轴比0.46dB。 相似文献
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The configuration of a back-to-back rectangular-patch antenna fed by a coplanar waveguide (CPW) is proposed. The characteristics of the proposed antenna element were clarified by experiments. The radiation patterns and input impedances were measured as parameters of the widths of the rectangular patch and the substrate. Experimental results for an array antenna using the proposed back-to-back rectangular-patch antenna element are described. Good omnidirectional radiation patterns and input impedance characteristics were obtained. The proposed array antenna is suitable for microcellular, wireless LAN, and indoor radio systems 相似文献
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A brick wall antenna fed by a coplanar waveguide is introduced. This antenna can be considered as an eleven element array of reduced size. Analysis is carried out both theoretically and experimentally. The proposed antenna is designed to work in the X-band ~9.5 GHz. The return loss, radiation pattern, and antenna gain of the proposed antenna are presented and briefly discussed. The antenna has several advantages, such as ease of fabrication, good control of input impedance, small cross polarisation level, and high directivity 相似文献
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Circularly polarised printed antenna fed by coplanar waveguide 总被引:1,自引:0,他引:1
A new structure of the circularly polarised printed antenna fed by coplanar waveguide (CPW) is proposed. FDTD analysis predicts the radiation of the circularly polarised wave from the antenna. The validity of this analysis is established by comparing with experimental results 相似文献
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基于FR4环氧板,设计了一种可用于体域网的非对称共面波导馈电的超宽带天线。该天线由Y型贴片、梯形地板和三叉戟共面馈线组成。Y型贴片、圆形贴片、三角形贴片实现4~5 GHz的中低频处带宽小于-10 d B的效果,梯形地板和三叉戟共面馈线实现7~14 GHz的高频处带宽小于-10 d B的效果。该天线采用非对称共面波导的馈电方式,具有良好的共面性与高度的集成性,使得天线的总体尺寸更小,辐射贴片的面积为22 mm×21 mm。与以往的小型化超宽带天线相比,该天线具有尺寸更小、带宽更宽的优势。经网络矢量分析仪测试结果表明,该天线在2. 14~11. 32 GHz的超宽带频段内回波损耗小于-10 d B(相对带宽为136. 4%),可适用于2. 4/5. 2/5. 8 GHz无线局域网、3. 5/5. 5 GHz WiMAX、LTE频段38和LTE频段40。同时,该天线距离人体大于5 mm时的比吸收率(SAR)小于2 W/kg,满足国际标准。 相似文献
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Tzyh-Ghuang Ma Chao-Hsiung Tseng 《Antennas and Propagation, IEEE Transactions on》2006,54(4):1105-1110
In this paper, we present a new coplanar waveguide-fed tapered ring slot antenna for ultrawideband (UWB) applications. This antenna consists of a 50 /spl Omega/ coplanar waveguide feeding line, wideband coplanar waveguide-to-slotline transition, and a pair of curved radiating slots. The impedance bandwidth with VSWR<2 is from 3.1 GHz to more than 12 GHz. The actual operating bandwidth is, however, limited by the distortion of radiation patterns. Such pattern distortion can be attributed to the antenna mode transition and is investigated in this paper with the help of the radiation patterns in the traditional sense as well as a dimensionless normalized antenna transfer function. By suitably allocating such mode-transition phenomenon to the notched band in a UWB radio, we demonstrate that antennas with desirable radiation characteristics in both UWB low and high bands can be readily achieved. The system responses of a transceiving antenna system in free space are addressed as well. 相似文献
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文中通过加载超表面(Metasurface,MTS)的方式设计了一款超表面的宽带微带天线,将传统的矩形辐射贴片替换成超表面结构,提高了微带天线的电性能。天线通过共面波导的阶梯型孔径馈电。超表面印刷在介质板顶面,而介质板底面为共面波导馈电电路,从而增加了超表面与底层馈电孔径之间的耦合。超表面和阶梯型的孔径共同作用,使天线获得了较宽的阻抗带宽。文中设计的天线结构简单,外形紧凑。该天线的-10 dB相对阻抗带宽约为56.4%(7~12.5 GHz),覆盖整个X波段,主辐射方向偏离法向30°。实验测试结果与仿真结果吻合较好,为军事领域中的侦查和探测以及超宽带短距离室内定位中的天线设计提供了思路。 相似文献
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A novel optically transparent ultra-wideband (UWB) disc monopole antenna is proposed. The antenna is fed by a 50 Ω coplanar waveguide and its operational bandwidth is measured from 1 to 8.5 GHz. Gain and radiation patterns are also presented. The antenna exhibits omnidirectional and monopole-like radiation patterns at low frequencies for the H-plane and E-plane, respectively. The proposed antenna uses the highly conductive AgHT-4 transparent film, which makes the antenna suitable for inter-vehicle communication. 相似文献
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Tanyer-Tigrek F.M. Tran D.P. Lager I.E. Ligthart L.P. 《Antennas and Propagation Magazine, IEEE》2009,51(2):61-70
An optimized coplanar waveguide fed quasimagnetic printed antenna for ultra wideband applications is described. A parameter study, motivated by a design procedure, allowed a substantial increase in the return-loss operational bandwidth. The numerically predicted performance was validated by means of physical measurements of fabricated samples. The measured radiation patterns of the antenna demonstrated its adequate radiation characteristics. The feed radiation was also investigated by means of physical measurements. 相似文献
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Microstrip antennas aperture coupled to a grounded coplanar waveguide (GCPW) have been fabricated on a single layer substrate and studied experimentally and theoretically. Through-plated via holes are used to suppress spurious parallel plate modes. Measurements demonstrate that this antenna element has good performance for both bandwidth and radiation patterns. Calculations using a commercial CAD package are in reasonable agreement with measured data 相似文献