一种具有紧凑结构的宽频带圆极化天线设计  

Design of Compact Broadband Circularly Polarized Antenna with Modidied Ground-Plane

作　　者：白昊 王光明[1] Bai Hao;Wang Guangming(Air Force Engineering University,710051)

机构地区：[1]空军工程大学,西安710051

出　　处：《测控与通信》2021年第4期43-46,共4页

摘　　要：本文提出1种共面波导馈电的宽频带圆极化天线。天线由1个Y型辐射贴片和经过改进的地板组成,通过调节地板上缝隙的位置和长度,天线的阻抗带宽(RL≥lOdB)可以达到2270 MHz(中心频率为6.18 GHz),3 dB轴比带宽可以达到2060 MHz(中心频率为6.19GHz)。在6.19GHz时,天线的增益可以达到3.5dBi,而且在整个工作频带内天线的增益变化不超过ldB。天线结构简单,非常适合于实际的工程应用。A compact CPW-fed circularly polarized planar monopole antenna with broadband characteristics in both impedance and axial ratio is proposed.The antenna is composed of a Y-shaped radiating patch and a modified ground-plane with a horizontal slit.By appropriately choosing the position and dimensions of the slit,the proposed antenna can be achieved with the impedance bandwidth(RL≥10dB)of about 2270MHz(36.8%at 6.18 GHz)and the 3dB axial-ratio(AR)bandwidth of about 2060MHz(33.3%at 6.19 GHz).In addition,the peak gain of the proposed antenna at 6.19 GHz is 3.5 dBi,with less than ldB gain variation within the operation bandwidth.Furthermore,the antenna structure is extremely simple for practical applications.

关 键 词：圆极化 宽频带天线 轴比 

分 类 号：TN8[电子电信—信息与通信工程]