摘要
设计了一种应用于多模系统的宽带特性圆极化天线。该设计基于自相移形式的圆极化交叉偶极子天线,通过在偶极子臂之间引入寄生单元来拓展天线的阻抗带宽和轴比带宽,应用三维电磁场仿真软件CST(CST Studio Suite)建模仿真,确定寄生单元的数量、位置及相关参数,并验证天线的性能。仿真结果表明,在1.12 GHz~ 2.11 GHz 的导航频段内,所设计天线满足回波损耗大于10 dB;阻抗带宽相对值为61%;轴比带宽为53%,覆盖范围为1.16 GHz^2.00 GHz;增益最大值可达10.5 dBic。
A circular polarized antenna with wideband characteristics is designed. Based on the self-shift form of the conventional cross-dipole circular polarized antenna, the impedance bandwidth and 3dB axis ratio bandwidth of the antenna can be effectively improved by placing a parasitic element between the dipole arms. The CST is used to determine the number of parasitic element, to certain the location of parasitic element, and to verify the performance of antennas. Simulation results show that the impedance bandwidth is 61% under the band range from 1.12 GHz to 2.11 GHz, and the 3 dB axial-ratio bandwidth is 53% with covering range from 1.16 GHz to 2.00 GHz.The antenna has the maximum circular polarization gain of 10.5 dBic at the operating bandwidth.
作者
商锋
苟恬静
SHANG Feng;GOU Tianjing(School of Electronic Engineering,Xi'an University of Posts and Telecomunications, Xi'an 710121, China)
出处
《西安邮电大学学报》
2019年第2期51-56,66,共7页
Journal of Xi’an University of Posts and Telecommunications
关键词
多模系统
交叉偶极子
圆极化
宽带
寄生单元
multimode system
cross-dipole
circular polarized
wideband
parasitic element
