基于二维光子晶体射频带通滤波器的研究

Research on radio frequency bandpass filter based on two-dimensional photonic crystal

为了提高无线通信系统的传输质量,提出了一种新型基于二维光子晶体射频带通滤波器,滤波器的结构由线缺陷波导和Aubry-André-Harper(AAH)谐振腔组成。通过改变AAH谐振腔与输出波导间介质柱的半径,增加它们之间的耦合系数,从而实现在1666.64μm处射频波段的滤波。仿真结果表明:该射频滤波器性能优良,通带中心波长为1666μm,透射率为0.99,通带插入损耗为0.06 dB,品质因数Q值为1×104,器件尺寸小,结构简单,易于大规模集成。

In order to further improve the transmission quality of the wireless communication system,a new type of radio frequency bandpass filter based on two-dimensional photonic crystal is proposed.The filter is composed of a line defect waveguide and an Aubry-André-Harper(AAH)resonator.By changing the radius of the dielectric column between the AAH resonator and the output waveguide,the coupling coefficient between them is increased,realizing the filtering of the radio frequency band at 1666μm.The simulation results show that the radio frequency filter has excellent performance,the center wavelength of the passband is 1666.64μm,the transmittance is 0.99,the passband insertion loss is 0.06 dB,and the quality factor Q value is 1×104.The device is small in size,simple in structure.