CAJ | 학술논문

设计了一种双屏频率选择表面,由传输线模型和表面电流、电场分布分析了其透波机理,并将其作为微带天线的天线罩；由射线理论和相位相消原理分析了新天线高增益和带内雷达散射截面减缩机理.仿真和实验结果表明：加载天线罩后的天线,在带宽没有受到影响的条件下,天线增益提高了5.49 dB,E、H面半功率主瓣宽度分别减小了63°和52°；同时,在2~18 GHz范围,天线法线方向带外和带内雷达散射截面减缩均在5 dB以上；在-23°~23°范围,天线带内雷达散射截面减缩最大超过20.94 dB.
설계료일충쌍병빈솔선택표면,유전수선모형화표면전류、전장분포분석료기투파궤리,병장기작위미대천선적천선조；유사선이론화상위상소원리분석료신천선고증익화대내뢰체산사절면감축궤리.방진화실험결과표명：가재천선조후적천선,재대관몰유수도영향적조건하,천선증익제고료5.49 dB,E、H면반공솔주판관도분별감소료63°화52°；동시,재2~18 GHz범위,천선법선방향대외화대내뢰체산사절면감축균재5 dB이상；재-23°~23°범위,천선대내뢰체산사절면감축최대초과20.94 dB.
A double screen frequency selective surface(FSS) is designed and applied as the radome of the microstrip antenna.By analyzing the transmission line model and simulating the electric field distribution and current distribution on the double screen frequency selective surface at the resonance frequency,its physical mechanism of wave-transparent is theoretically investigated.The new antenna high-gain and in-band radar cross section(RCS) reduction mechanism is analyzed by the ray theory and phase cancellation principle.Simulation and measurement results demonstrate that:the application of the double screen FSS has hardly influence the bandwidth of the antenna,while the gain of antenna is enhanced by 5.49 dB,the half-power beam width of the E-plane and H-plane is reduced 63°and 52°,respectively.The RCS of the antenna is reduced by 5 dB or more in an operation band from 2~18 GHz,and the in-band RCS reduction of the antenna is above 5 dB from -23°~23° and the maximum reduction value exceeds 20.94 dB in the boresight direction.