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Inverted-F broadband antenna suitable for vehicle's mobile communication

A vehicle mobility and broadband technology, which is applied to the antenna field of vehicle cellular mobile communication, can solve problems such as large wind resistance, and achieve the effects of good directionality, convenient processing and manufacturing, and good impedance matching.

Inactive Publication Date: 2015-06-10
GUANGDONG SHENGLU TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the antenna still needs to be installed on the surface of the car body such as the top of the car head, which will cause greater wind resistance when the train is running at high speed

Method used

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  • Inverted-F broadband antenna suitable for vehicle's mobile communication
  • Inverted-F broadband antenna suitable for vehicle's mobile communication
  • Inverted-F broadband antenna suitable for vehicle's mobile communication

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Embodiment Construction

[0029] 以下结合具体实施例对本发明的技术方案作详细的描述。

[0030] 本发明是一种适用于车辆移动通信的宽带倒F天线,包括单极子辐射体1和金属底板2,单极子辐射体由一块矩形金属片经边缘轮廓赋形加厚得到的,沿矩形辐射体边缘轮廓的不同位置向内开多个凹槽,单极子辐射体1立于金属底板2上,长边沿水平方向放置,从单极子辐射体的左侧下端点与底板之间的间隙进行馈电,右侧下端点短路至金属底板。 所述单极子辐射体边缘赋形,是指将其四条长方形直边进行几何弯折、圆弧化处理或用样条曲线取代,根据工作频带和尺寸缩减要求来确定整个轮廓形状的边缘线 style.

[0031] 所述单极子辐射体1的长边L沿水平方向(X轴)、宽边W沿竖直方向(Z轴)放置于一个长轴为a(X轴),短轴为b(Y轴)的椭圆形金属底板上方,单极子辐射体的底边距底板高度为h,从左侧下端点与底板之间的间隙进行馈电,右侧下端点短路至底板;然后,通过将单极子辐射体设置为具有一定厚度t的金属块状以进一步增大宽带和实现阻抗匹配,再用50Ω标准同轴线穿过底板从左侧下端点进行馈电,50Ω标准同轴线的内导体连接下端点,外导体连接底板,为了降低天线剖面高度和整体尺寸,对矩形单极子辐射体的边缘进行几何赋形以增大电流路径长度;另外,单极子辐射体的侧面挖槽形成凹位3,单极子辐射体的边缘轮廓连接凹位3并形成凸缘,以切薄金属块的方式以减轻天线整体重量和节省材料。

[0032] 单极子辐射体1边缘赋形轮廓,是从左端的馈电点1-6出发,向上依次延伸为外边缘第一个凹槽1-1、外边缘第二个凹槽1-2,外边缘第二个凹槽的末端向上延伸弯折连接有第一水平段1-9,第一水平段的末端向下弯折延伸有外边缘第三个凹槽1-3,外边缘第三个凹槽的末端向上延伸弯折,并连接有第二水平段1-10,第二水平段的末端向下弯折为阶梯状边缘1-11,阶梯状边缘的底部穿过右端短路点1-4,向馈电点方向延伸并形成连接于馈电点和短路点之间的内边缘第一个凹槽1-5。辐射体内外边缘所有边角均进行倒圆角1-8处理。单极子辐射体和椭圆形底板所用材料均为导电性较强的金属材料,包括银、纯铜、金、合金铜、纯铝和压铸铝。综合考虑导电能力和加工难易、成本,这里选用材料为纯铝或压铸铝。

[0033] 为了电气连接可靠和方便,50Ω同轴线并不直接连接馈电点,而是通过带法兰盘的同轴...

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Abstract

The invention discloses an inverted-F broadband antenna suitable for vehicle's mobile communication. The inverted-F broadband antenna comprises a monopole radiating body and a metallic baseboard, wherein the monopole radiating body is formed by thickening one rectangular metal sheet by forming an edge profile, and the different positions along the edge profile of the rectangular radiating body are inward provided with multiple grooves, the monopole radiating body is arranged on the metallic baseboard, the long edge of the monopole radiating body is placed along a horizontal direction, the feed is supplied to the gap between the left lower endpoint of the monopole radiating body and the baseboard, and the right lower endpoint to the metallic baseboard is in a short-circuit status. The antenna operates in high and low frequency bands, the low frequency band is 689MHz-960MHz (VSWR (Voltage Standing Wave Ratio) is no more than 2.15 and the bandwidth is 31.60%), the high frequency band is 1260MHz-6500MHz (VSWR is no more than 2.17 and the bandwidth is 135.05%), and the antenna covers all mobile communication frequency bands of three operators 2G / 3G / 4G, thus the antenna is extremely wide in frequency band, excellent in directivity, high in efficiency, small in size, low in profile and easy to process; the antennas is suitable for the optimized antenna type of high-speed rail mobile communication and beneficial to reduce the air resistance of a train which runs at a high speed.

Description

technical field [0001] 本发明涉及通信天线设备技术领域,更具体的是涉及一种适用于车辆蜂窝移动通信的天线。 Background technique [0002] 目前,移动通信技术日益成为信息时代人们获取资讯不可或缺的途径,而实现“任何人、在任何时候、任何地方、以任意方式获取信息”的梦想已因此逐渐变为现实。随着经济不断发展,人们的出行活动日益频繁,在交通工具上度过的时间也越来越多。自然地,人们在乘坐汽车和高铁等交通工具时,希望能享受到如同在市区和家中一样的高质量无线通信服务。当前,高速公路和高速铁路多采用沿线建设专用的移动基站以实现全线路的无缝覆盖。由于车辆运行速度很快,如高铁时速达到350km / h,造成越区切换频繁,多普勒效应显著,使得通信链路健壮性大大下降。另外,由于车体结构强度大,导致电波穿透损耗增大,车内信号电平下降。有鉴于此,采用车内直放站便可很好地克服上述困难。然而,天线仍需要安装于车体表面如车头顶部,这样便会导致列车高速行驶时产生较大风阻。综上所述,高性能、宽频带、低剖面、小型化、轻重量、低成本的车载天线成为高速车辆无线通信技术的关键。 Contents of the invention [0003] 本发明的目的就是旨在为高速车辆尤其是高铁列车移动通信提供一种高性能、低剖面、小型化、轻重量、结构简单、成本低廉的宽带天线解决方案。 [0004] 本发明是采用如下技术解决方案来实现上述目的:一种适用于车辆移动通信的宽带倒F天线,包括单极子辐射体和金属底板,其特征在于,所述单极子辐射体由一块矩形金属片经边缘轮廓赋形加厚得到的,沿矩形辐射体边缘轮廓的不同位置向内开多个凹槽,单极子辐射体立于金属底板上,长边沿水平方向放置,从单极子辐射体的左侧下端点与底板之间的间隙进行馈电,右侧下端点短路至金属底板。 [0005] 作为上述方案的进一步说明,所述单极子辐射体的长边L沿水平方向(X轴)、宽边W沿竖直方向(Z轴)放置于一个长轴为a(X轴),短轴为b(Y轴)的椭圆形金属底板上方,单极子辐射体的底边距底板高度为h,从左侧下端点与底板之间的间隙进行馈电,右侧下端点短路至底板;然后,通过将单极子辐射体设置为具有一定厚度t的金属块状以进一步增大宽带和实现阻抗匹配,再用50Ω标准同轴线穿过底板从左侧下端点进行馈电...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/50H01Q5/20H01Q5/357H01Q5/50H01Q1/32
CPCH01Q1/243H01Q5/371H01Q9/42
Inventor 李道铁金克之何永星
Owner GUANGDONG SHENGLU TELECOMM TECH
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