车载鲨鱼鳍式超宽带多功能天线的研制

设计了一种用于车载应用的新型超宽带鲨鱼鳍天线。该天线工作频域覆盖了应用于车载通信的四个宽频带(824~960 MHz、 1 710~ 2 170 MHz、 2 300~ 2 690 MHz 以及3 300~ 5 000 MHz )，使得该天线系统集卫星导航、移动通信、WiFi、蓝牙、FM收音等多功能性于一体。主集天线尺寸为50 mm ×42 mm ×1.6 mm ，且由1/4椭圆单极子枝节和矩形单极子枝节组成，并将天线垂直放置在鲨鱼鳍式金属板上，从而方便了天线的制作和加工。仿真结果表明，全频段驻波比小于4 dB，全频段天线隔离度小于-15 dB ，且包络相关系数(Envelope Correlation Coefficient,ECC)小于0.1。与最大增益和辐射效率方面的实测值相比，该天线的模拟结果显示出良好的一致性，可广泛应用于车载通信系统中。

Design of a vehicular shark-fin type ultra-wideband multifunction antenna

A new type of ultra-wideband(UWB) shark-fin antenna for vehicular applications is designed.Covering four wide frequency bands(824~960 MHz,1 710~2 170 MHz,2 300~ 2690 MHz,and 3 300~5 000 MHz) of the vehicular communication system,the antenna system integrates the versatility of satellite navigation,mobile communication,WiFi,Bluetooth,and FM radio.The main antenna with a compact size of 50 mm×42 mm ×1.6 mm is composed of a 1/4 elliptical monopole and a rectangular monopole,while the proposed antenna is placed vertically on the shark-fin metal plate,thus facilitating the production and processing of the antenna.Simulations of the proposed antenna show that the voltage standing wave ratio(VSWR) of the full frequency band is less than 4 dB while isolation of the full frequency band is more than 15 dB,and the envelope correlation coefficient(ECC) is less than 0.1 all over the frequency band.Simulated results show good agreement with measurements in terms of peak gain and radiation efficiency.The designed antenna can be widely used in vehicular communication systems.