【作者】 岗浩杰； 郝张成；

【Author】 GANG Haojie;HAO Zhangcheng;State Key Laboratory of Millimeter Waves,Southeast University;

【机构】 东南大学毫米波全国重点实验室；

【摘要】 本文提出了一种工作于10.7～12.75 GHz的双阻带圆极化滤波天线。在上阻带(13.7～14.5 GHz)通过级联新型开口谐振环结构实现大于25.17 dB增益抑制。在下阻带(7.25～8.4 GHz),通过采用二分之一波长短路谐振枝节和带状线耦合达成大于23.39 dB增益抑制。天线辐射单元采用双层倾斜偶极子贴片结构,不仅实现了良好的的圆极化性能,还通过双层结构引入额外的圆极化谐振点,有效拓宽轴比带宽到18.78%。基于此天线单元,采用顺序旋转形式组成镜像对称的3×8三角栅格阵列,在11.725 GHz处,波束在xOz面的扫描角度可达±43°,在该扫描范围内轴比低于3 dB,且最大增益波动在2.7 dB以内。更多还原

【Abstract】 A dual-stopband circularly polarized filtering antenna operating in the 10.7～12.75 GHz frequency band is proposed in this paper.In the upper stopband(13.7～14.5 GHz),a gain suppression exceeding 25.17 dB is achieved by cascading a novel split ring resonator.For the lower stopband(7.25～8.4 GHz),a half-wavelength shorted resonant stub coupled with stripline technology delivers over 23.39 dB gain rejection.The antenna’s radiating element adopts a dual-layer tilted dipole patch configuration,which not only provides robust circular polarization performance,but also introduces an additional circularly polarized resonance through the dual-layer structure,effectively broadening the axial ratio bandwidth to 18.78%.A mirror-symmetric 3 X 8 triangular lattice array is realized using sequential rotation.At 11.725 GHz,the measured beam can be steered up to ±43° in the xoz-plane with an axial ratio below 3 dB,while the maximum gain variation is within 2.7 dB.更多还原