四臂平面缝隙螺旋天线的设计与实现  

The Design and Realization of a Four-arm Spiral Slot Antenna

作　　者：张勇虎[1] 周力[1] 欧钢[1] 

机构地区：[1]国防科技大学电子科学与工程学院卫星导航研发中心,长沙410073

出　　处：《微波学报》2007年第3期29-30,47,共3页Journal of Microwaves

摘　　要：对串行馈电的四臂缝隙螺旋天线进行了分析,通过调整缝隙螺旋的臂长可以实现目标频段上的串行谐振馈电,提高目标频段的天线总效率和增益。由于天线的轴对称性,其轴比和相位中心稳定度都很好。在螺旋臂终端加负载电阻可提高轴比,但会降低天线增益,须在轴比和增益指标之间折衷选择负载电阻的大小。仰角大于5°时,天线的轴比测试值小于4dB,相位中心稳定度优于2mm,圆极化增益高于-3.6dBi。A Four-arm spiral slot antenna with sequentially feed is analyzed. By adjusting the length of spiral slot, resonance feed can be realized in the aimed band in order to maxim the antenna＇s efficiency and gain. Axial ratio and phase center stability performance of the antenna are high due to its natural symmetry. Adding a resistor at the end of each spiral slot arm can improve axial ratio, but gain is degraded. So the value of resistor is compromised between axial ratio and gain performance. Above 5°, measured axial ratio value is below 4dB, phase center stability is better than 2mm, and gain is more than -3.6dBi.

关 键 词：缝隙螺旋天线 串行馈电 相位中心稳定度 

分 类 号：TN823[电子电信—信息与通信工程]