一种新型多频段共形微带天线的研究与设计

Analysis and design of a novel multi-frequency conformal microstrip antenna

文章提出了一种适用于无线通讯系统的新型多频段共形微带天线。该天线由2个对称的双T槽型微带贴片组成,并以圆柱为载体形成共形。该天线由同轴线馈电,采用HFSS软件仿真,通过调节天线尺寸的大小,改变天线谐振点的大小,从而控制在指定频率范围内谐振点的个数;当天线尺寸一定时,可通过改变馈电点的位置对不同频率模式进行激励或者抑制。仿真结果显示,在3~7GHz频段内,该天线可以使得4个频段同时工作,其中心频点分别为4.10、5.86、6.44、6.92GHz。该微带天线具有共形、四频段同时通信、易于小型化等特性,可以应用于不同通信系统中。

A novel multi-frequency conformal microstrip antenna is proposed for the wireless communication system.This antenna is composed of two double T-slot microstrip patches and is mounted on a dielectric cylinder to form the conformal antenna.The proposed antenna is fed by coaxial feed,which is simulated by high frequency structure simulator（HFSS）software.By adjusting the sizes of the antenna,the resonant frequencies can be changed.Therefore,the number of resonant frequencies can be controlled in the given frequency range.When the antenna sizes are fixed,adjusting the location of the feeding point can excite or suppress the resonant mode.The simulation results show that it can provide quad-frequency to work at the same time under the bandwidth from 3 GHz to 7 GHz.The center frequencies of the quad-frequency are 4.10 GHz,5.86 GHz,6.44 GHz and 6.92 GHz,respectively.The proposed antenna is conformal and easy to compact,and achieves multi-frequency operation.It can be applied in a variety of communication systems.