一种宽带圆极化介质半球面螺旋天线

Novel broadband circular-polarized dielectric hemispherical helical antenna

研制了一种新型双臂等角半球面介质螺旋天线,应用基于曲线基函数的矩量法对其辐射特性进行了分析,给出了天线的驻波、极化及方向图等随频率变化的曲线.计算与实测结果表明,在800 MHz^2 600 MHz的频带内,驻波比基本小于2,轴比小于3 dB,相对带宽可达106%.

A novel bifilar constant-angle dielectric hemispherical helical antenna is developed. Its radiation properties are analyzed by the moment method with the curved basic and testing function, the curves of VSWR, polarization and pattern vs. frequency are presented, respectively. The calculated and measured results show that within the range of 800 MHz-2 600 MHz VSWR is less than 2, that AR is less than 3 dB, and that the relative bandwidth reaches 106%