一种用于毫米波双向通信的波导喇叭天线设计

Design of a Waveguide Horn Antenna Applied to Millimeter-Wave Bidirectional Communication

毫米波由于方向性强,要实现在同一直线上的前后向通信,通常采用功分器+双天线的方式。为进一步实现集成化,本文提出了一款将波导功分器和双矩形波导喇叭天线进行集成设计的波导喇叭天线。首先,根据波导的两级阻抗变换设计T型宽带波导功分器;然后,根据最佳角锥天线公式完成对矩形喇叭天线设计仿真;最后,将波导功分器和双矩形形喇叭天线按工程应用进行集成设计建模仿真。仿真结果表明该双向天线最大增益为22.48dBi,在71-86GHz的频带内S_(11)优于15dB。除此之外,本次设计的波导喇叭天线具有结构简单、尺寸小、加工容易等优点,通过合理地集成到宽带通信设备中,可满足货运铁路准线性区上下行的双向无线接入。

Due to the high directionality of millimeter wave,it usually employs a power divider combining with two antennas to achieve forward and backward communication on the same straight line.To further achieve integration,this article proposes a waveguide horn antenna that integrates a waveguide power divider and dual rectangular waveguide horn antennas.Firstly,a T-type broadband waveguide power divider based on two-stage impedance transformation of the waveguide is designed;Then,the design and simulation of the rectangular horn antenna based on the optimal pyramid antenna formula is implemented;Finally,the integrated design,modeling and simulation of the waveguide power divider and dual rectangular horn antenna are carried out according to the engineering application.The simulation results show that the maximum gain of the bidirectional antenna is 22.48dBi,and S_(11)is better than 15dB in the frequency range of 71-86 GHz.In addition,the waveguide horn antenna designed in this project has the advantages of simple structure,small size,and easy processing.By reasonably integrating it into broadband communication equipment,it can meet the bidirectional wireless access of freight railways in the quasi linear area.