一种低剖面宽带垂直极化全向天线设计

Design of a Low Profile Broadband Vertically Polarized Omnidirectional Antenna

本文设计了一种用于DSRC频段的低剖面宽带垂直极化全向型天线.天线通过在中心馈电的圆形贴片外加载耦合圆环,在接地板上加载4个矩形环槽,并在圆环外边缘对称地加载6个短截线的方式产生了3个谐振模式,展宽了天线的工作带宽.测试结果表明,设计的天线工作在DSRC频段,在反射系数<-10 dB时的阻抗带宽达到17.6%(5.54 GHz^6.61 GHz),天线高度仅为0.032λ(λ是5.9 GHz对应的波长).通带内增益比较平坦,最大增益是3 dBi,天线具有垂直极化特性,并且水平方向是全向辐射.

A low profile broadband vertical polarization omnidirectional antenna is designed for DSRC band.The antenna loads a coupling ring on the center-fed circular patch,and four rectangular ring slots on the ground plate.The outer edge of the coupling ring loads six short stubs symmetrically.The operating bandwidth of antenna is widened rely on generated three resonance modes.The measured results show that the designed antenna works in the DSRC frequency band,the impedance bandwidth reaches 17.6%(5.54 GHz^6.61 GHz)at the reflection coefficient less than negative 10 dB,and the antenna height is only 0.032λ(λis the wavelength corresponding to 5.9 GHz).The gain in the passband is relatively flat,and the maximum gain is 3 dBi.The antenna has vertical polarization characteristics,and the horizontal direction is omnidirectional radiation.