共查询到18条相似文献,搜索用时 671 毫秒
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提出一种新型的微带馈电准自补天线,其辐射贴片由矩形和扇形金属片构成,并在地板上刻与辐射元互补的缝,天线整体尺寸为25 mm×32 mm×1 mm,为进一步展宽带宽,在馈电点下方的地板上挖去一个矩形缺口。仿真结果表明:驻波比小于2的带宽覆盖3.04~11.00 GHz,在整个工作频段有良好的辐射方向图。通过在馈线上嵌入U型槽,实现了对WLAN频段的陷波,而通带内仍可保持稳定的增益。 相似文献
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本文给出了一款小型化多频段平面印刷单极子天线的设计和分析过程.该天线由一个矩形主辐射贴片和两个附属辐射枝节组成.主辐射贴片和两个附属枝节分别产生三个通带覆盖2.4/5.2/5.8GHz的WLAN工作频段和2.5/3.5/5.5GHz的WiMAX工作频段.天线的仿真结果表明,在WLAN频段以及WiMAX频段天线具有良好的阻抗带宽和辐射效率,天线的总尺寸为20mm×30mm×1.6 mm,结构紧凑,易于制作,适用于WLAN和WiMAX系统. 相似文献
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利用折叠法和镜像法设计了一款具有全向辐射特性的小型化超宽带单锥天线。天线辐射单元通过折叠技术实现了天线的小型化,通过镜像法和末端加载实现了天线的低剖面。在天线周围加载圆柱形套筒,通过改善天线在高频处的阻抗匹配,进一步拓展天线的带宽。在保证天线低剖面的同时,与传统的单锥天线相比,文中提出的天线金属地板尺寸较小,仅为0.236λmin,具有较好的工程应用前景。天线实现了在1~7.65 GHz的频率范围内,VSWR<2,实现了153.8%的阻抗带宽。天线在频带范围内最大增益为6 dBi,不圆度小于2 dB。天线的整体物理尺寸为30 mm×30 mm×30 mm,对应的低频电尺寸为0.1λmin×0.1λmin×0.1λmin。加工了样机进行测试,测试结果和仿真结果吻合度较好,验证了设计的可靠性和有效性。这种低剖面、超宽带的全向天线可以作为室内基站天线、无人机机载天线等,具有广泛的应用场景。 相似文献
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基于新馈电结构,设计了一款覆盖全球四大卫星导航系统的双频宽带贴片天线。采用了一种四分八馈电线路,以8个同轴馈电探针两两相连的方式将两路天线馈电信号合为一路,有效简化了馈电网络的复杂性,同时保证了天线辐射的增益、带宽和轴比性能。该双频辐射贴片单元采用正八边形层叠式结构设计,并在每个天线单元边缘对称添加两组矩形调谐单元,有效增加了天线辐射的波束带宽。该双频天线单元在高频1.482~1.617 GHz(波束带宽155 MHz)和低频1.191~1.252 GHz(波束带宽61 MHz)频段范围内,都能保证良好的辐射增益;高低频的3 dB轴比带宽为-130°~130°,具备良好的圆极化性能。经实物样机对比测试分析,实测结果与仿真结果基本吻合。 相似文献
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提出一种适合在全面屏手机终端上使用,带宽为700~960 MHz、1 710~2 170 MHz、2 500~2 700 MHz的手机天线.设计的手机仿真模型的长宽高尺寸为158 mm×77 mm×7.5 mm,手机天线的长宽高尺寸为70 mm×5 mm×4 mm,其天线效率分别为20%~35%(700~960 MHz)、20%~55%(1 710~2 170 MHz)、25%~35%(2.5~2.7 GHz).在目前全面屏天线净空区域3.5 mm的情况下,天线的辐射效率能够满足设计要求. 相似文献
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文中设计了一种应用于车载通信的多频段全向天线。该天线由印制于FR4 介质基板正反两面的金
属贴片组成,通过在主辐射贴片上端加载弯折枝节、在侧边加载边缘谐振单元、在背面加载电耦合电感电容(ELC)谐
振单元实现了其多频段特性;在主辐射贴片上蚀刻C 形槽拓宽了天线的中频带宽;天线的尺寸为58 mm×42 mm×
1. 6 mm。测试结果表明:S11≤-10 dB 的阻抗带宽为0. 82~0. 96 GHz、1. 7~2. 69 GHz、3. 34~3. 66 GHz、4. 81~4. 97 GHz,
覆盖了2G、3G、4G、5G 等频段。该天线具有小尺寸、宽频带以及全向性好等优点,可以应用于车载通信或其它移动
通信场景。 相似文献
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A novel CPW-fed wideband planar monopole antenna with a symmetrically slope ground plane is proposed. By choosing the suitable slope angle of this symmetrically slope ground plane, wideband operation can be obtained. From the experimental results, the operating mode has an impedance bandwidth of about 1162 MHz (1700-2862 MHz) that covers the DCS band (1710-1880 MHz), PCS band (1850-1990 MHz), 3G band (1920-2170 MHz), and Bluetooth band (2400-2483 MHz). The proposed antenna within these operating bands has similar monopole-like radiation patterns. It is suitable for application to wireless communication systems with its relatively low profile. 相似文献
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该文提出一种小型化超宽带印刷单极子天线,阻抗带宽为3.17~50GHz。该天线采用圆彤单板子为辐射结构,利用共而波导馈电方式.天线的尺寸为30×32×1.6mm,通过适当地调整板尺寸和阋形辐射单元的半径,可以使天线得到很好的阻抗匹配。与以往的天线相比,带宽更宽,尺寸更小,天线具有良好的辐射性能,达到了小型化的婪求.可为将来的超宽带通信应用提供良好的选择。 相似文献
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移动通信基站电磁辐射信号的监测是移动通信正常工作的重要保证,也是保障电磁环境安全的必要手段.文章针对监测设备核心部件——电场测量传感天线的需求,设计了一种新型的介质埋藏式多频段振子天线.利用多层印制电路板(printed circuit board,PCB)布板技术,将三个串馈微带印刷振子天线埋藏在介质基板中,可有效减小天线尺寸.通过仿真和优化实现电场测量传感天线的设计,并制作了天线实物,同时进行了参数测量,结果表明:天线工作的频段基本覆盖2G、3G、4G网络的工作频率范围,分别为0.850~0.950 GHz,1.670~2.740 GHz,方向图全向性好,大小为72.0 mm×48.0 mm×6.0 mm,可以达到测量移动通信基站电磁辐射的电场测量传感天线的专用性、多频段、灵敏度、各向同性和便携性要求.可以使用本文设计的电场测量传感天线来测量基站周围空间电场强度. 相似文献
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A broadband dual frequency sleeve monopole antenna for application in digital television (DTV) systems and global system for mobile communications (GSM) is presented. A parasitic inverted L-shaped strip and dual planar sleeve structure are introduced in the back ground plane for expanding the frequency band. The simulated and measured results show that the impedance bandwidth covers the DTV (470? 862 MHz) band and GSM (824?960 and 1710?2170 MHz) band with VSWR less than 2.5. An omnidirectional radiation property is also shown. 相似文献
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A compact T-shaped dielectric resonator antenna (DRA) with two equilateral-triangle cross sections is investigated in this letter. The DRA is vertically placed on a finite ground plane and excited by a coaxial probe to provide broadband and conical radiation patterns. In order to examine the proposed design, simulations and measurements were employed to investigate the proposed antenna, and a good agreement between them was obtained. The proposed design produces an impedance bandwidth of more than 60% from 1.6 to 3.1GHz, which effectively covers several promising application bands in contemporary wireless communication systems, such as digital communication systems (DCS: 1710-1880MHz), personal communication systems (PCS: 1850-1990MHz), universal mobile telecommunication systems (UMTS: 1920-2170MHz), wireless local area networks (WLANs: 2.4-2.485GHz). Additionally, stable conical patterns were also obtained within the interest frequency band. 相似文献
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A compact varactor-tuned meander line monopole antenna for DVB-H signal reception is presented. The operating frequency of the antenna is continuously tuned over the frequency range of the DVB-H standard 470-702 MHz. The antenna has an omnidirectional radiation pattern and covers the frequency range with requisite impedance bandwidth and gain level. The antenna element occupies a very small volume (0.7 cm3 ) and can be used in 40 x 100 x 10 mm devices. 相似文献