CAJ | 학술논문

设计并制备了一种在5.42~5.80 GHz 频带内反射系数相位曲线斜率为正(一般为负)、幅度模值均在0.83以上、具有部分反射特性的双屏频率选择表面,并将该FSS以覆层的形式加载到波导缝隙天线辐射方向上,使其具有更宽的带宽,更高的增益,更强的定向性。采用射线理论和 Fabry-Perot 谐振腔模型分析了新波导缝隙天线辐射改善机理,并进行仿真和实验验证。仿真和实测结果表明：相比原始天线,加载覆层后,天线带宽增加了34.6%,鼻锥方向增益提高了6.94 dB,E、H 面半功率主瓣宽度分别减小了24°和128°。
설계병제비료일충재5.42~5.80 GHz 빈대내반사계수상위곡선사솔위정(일반위부)、폭도모치균재0.83이상、구유부분반사특성적쌍병빈솔선택표면,병장해FSS이복층적형식가재도파도봉극천선복사방향상,사기구유경관적대관,경고적증익,경강적정향성。채용사선이론화 Fabry-Perot 해진강모형분석료신파도봉극천선복사개선궤리,병진행방진화실험험증。방진화실측결과표명：상비원시천선,가재복층후,천선대관증가료34.6%,비추방향증익제고료6.94 dB,E、H 면반공솔주판관도분별감소료24°화128°。
A double screen FSS with positive reflection phase gradient(the general with negative slope),a-bove 0.83 reflection magnitude value and partially reflection features at 5.42~5.80GHz is designed and fab-ricated,the new waveguide antenan bandwidth is broadened,gain is improved and directivity is enhanced by applying the double screen FSS as a radome on the radiation orientation.The FSS radiation enhanced and scattering reduced mechanism are analyzed by adopting ray theory and Fabry-Perot resonator model,and the capabilities of new antenna are validated by simulation and experimentation.The results show that:the bandwidth of the antenna is increased by 34.6% and the gain of the antenna is enhanced by 6.94 dB,and the half-power beam width of E-plane and H-plane are reduced by 240 and by1280 respectively.