一种集成式车载天线设计

Design of an Integrated Vehicular Antenna

提出一款应用于车载通信系统的GNSS/4G/Wi Fi集成式天线设计。卫星导航天线采用陶瓷基板、尺寸大小为25 mm×25 mm×4 mm、单馈入点结构设计,配合低噪声放大器,可工作于GPS/BDS导航系统(L1:1 575 MHz/B1:1 561 MHz)。4G天线为共平面微带天线,在介电常数为4.4、板材厚度为1.0 mm的FR4基板上进行设计,使用微带线馈电方式,天线结构是由不同长度的微带线分支所组成。集成式天线的整体外观尺寸为76 mm×65 mm×13 mm,具有低剖面、体积小的特点,适合安装于任何一种需求卫星导航、4G通信与Wi Fi上网功能的车辆上。

The design of a GNSS /4G / Wi Fi integrated antenna for vehicular communication system was proposed. For GNSS antenna,ceramic substrate was used,size was 25 mm × 25 mm × 4 mm,single feed point the structure design was adopted,with low noise amplifier,it was worked in GPS / BDS navigation system（ L_1： 1 575 MHz/B_1： 1 561 MHz）. 4G antenna was a coplanar microstrip antenna,which was designed on the FR4 substrate with a dielectric constant of 4. 4 and a plate with a thickness of 1 mm,and the antenna structure was composed of microstrip lines with different lengths. The overall appearance size of the integrated antenna was 76 mm × 65 mm × 13 mm,with characteristics of low profile,small size. It is suitable for mounted on a vehicle for any kind of demand of satellite navigation,4G communication and Wi Fi function.