用于5G通信的二维圆柱型光子晶体波导带通滤波器设计

Design of Two-Dimensional Cylindrical Photonic Crystal Waveguide Bandpass Filter for 5G Communication

波导带通滤波器是大功率微波滤波的重要器件,为5G通信基站大功率微波传输提供了可能。基于光子晶体的频率带隙特性,把二维圆柱型光子晶体引入矩形波导中,设计了一款应用于5G通信的二维圆柱型光子晶体波导带通滤波器,仿真研究了该滤波器的滤波特性,以及引入点缺陷、线缺陷时滤波器的性能变化。二维光子晶体结构在矩形波导中在3~7 GHz之间显现了带通特性,仿真结果表明,该滤波器可以应用于5G通信n77、n78、n79频段。

Waveguide bandpass filter is an important component of high-power microwave filtering,which provides the possibility of high-power microwave transmission for 5G communication base stations.Based on the frequency band gap characteristics of photonic crystals,a two-dimensional cylindrical photonic crystal is introduced into the rectangular waveguide,and a two-dimensional cylindrical photonic crystal waveguide bandpass filter for 5G communication is designed.The filtering characteristics of the filter is simulated and studied.Furthermore,the characteristics and performance changes of the filter are also presented when point defects and line defects are introduced.The two-dimensional photonic crystal structure exhibits bandpass characteristics between 3 GHz and 7 GHz in the rectangular waveguide.The simulation results show that the filter can be applied to the n77,n78,and n79 frequency bands of 5G communication.