一种轴线倾斜的圆锥对数螺旋天线  

A Conical Logarithmic Spiral Antenna with an Inclined Axis

作　　者：丁亮 齐会颖 赵菲[2] 肖科 柴舜连[1] DING Liang;QI Huiying;ZHAO Fei;XIAO Ke;CHAI Shunlian(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China;Science and Technology on Blind Signal Processing Laboratory,Southwest Electronics and Telecommunication Technology Research Institute,Chengdu 610041,China)

机构地区：[1]国防科技大学电子科学学院,长沙410073 [2]西南电子电信技术研究所盲信号处理国家级重点实验室,成都610041

出　　处：《微波学报》2024年第5期55-60,77,共7页Journal of Microwaves

摘　　要：在圆锥对数螺旋天线构建阵列时,当有效辐射区间距超过一个波长或单元辐射方向不一致时,会出现阵列天线性能下降的情况。本文提出一种轴线倾斜的圆锥对数螺旋天线,将圆锥对数螺旋天线结构连续地向一侧平移,能够在实现轴线倾斜的同时,辐射结构依旧面向z轴方向。该天线的辐射保持沿z轴方向,具有“轴线倾斜,方向图少倾斜”的特点,可以解决圆锥对数螺旋天线阵列性能下降的问题。针对倾斜圆锥对数螺旋天线的复杂结构,给出了一种倾斜螺旋线展开方法,使天线可以用柔性印制电路板工艺加工。本文设计并加工了轴线倾斜20°的倾斜圆锥对数螺旋天线,实测方向图最大偏移11.8°,验证了该天线的有效性。When constructing the array of conical logarithmic spiral antenna,the performance of the array antenna with be degraded when the effective radiation zone spacing exceeds one wavelength or the unit radiation direction is inconsistent.In this paper,a kind of conical logarithmic spiral antenna with an inclined axis is proposed.By continuously shifting the conical logarithmic spiral antenna structrue to one side,the axis tilt can be realized while the radiation structure still faces the z-axis direction.Its radiation direction is kept along the z-axis direction,which has the characteristics of"axis inclined,pattern less inclined",which can solve the problem of performance degradation of the conical logarithmic spiral antenna array.Aiming at the complex structure of the inclined conical logarithm spiral antenna,a method of unwinding the inclined helix is presented,so that the antenna can be processed by flexible PCB technology.In this paper,an inclined conical logarithmic spiral antenna with axis tilt of 20°is designed and implemented.The maximum deviation of the measured pattern is 11.8°,which verifies the effectiveness of the proposed antenna.

关 键 词：圆锥对数螺旋天线 阵列 宽带 相位中心 

分 类 号：TN823.31[电子电信—信息与通信工程]