摘要
综合运用了H型缝隙耦合馈电技术和引入空气层技术展宽了天线的频带,设计出一个工作在Ku波段的宽频带微带天线单元并组成四单元阵列。该天线由两层介质板构成,并利用180°反相馈电抑制了高次模的耦合激励,降低了交叉极化电平。使用三维电磁场仿真软件(Ansoft HFSS)对微带天线进行仿真优化,仿真结果表明,天线单元性能良好,相对阻抗带宽(S11≤-10 dB)为8.5%,增益为8.05 dB。四单元天线阵列相对阻抗带宽(S11≤-10 dB)达到16.6%,增益为13.7 dB。天线阵列性能良好,设计方法具有很好的可扩展性。归纳总结出的介电常数计算式也具有普遍性。
This paper described a wide-band microstrip antenna and its 4 elements array antenna working at Ku-band.It adopted the H-shaped aperture-coupled feeding and inserting of the air layer technologies to achieve wider bandwidths.The antenna consisted of double-layered substrates.It applied the 180 degrees anti-phase feeding technique that contributed to suppress the higher order modes and decreased of cross-polarization.By using a software 3D electromagnetic field analysis（Ansoft HFSS）,the microstrip antenna was simulated and optimized.The simulated results show that the antenna element＇s relative impedance bandwidth is 8.5%,and the gain is 8.05 dB.The 4 elements array antenna＇s relative impedance bandwidth is 16.6%,and the gain is 13.7 dB.So the performance of the antenna is very well and the method of designing has a good expansibility.The expressions of permittivity that concluded is prevalent.
出处
《计算机应用研究》
CSCD
北大核心
2012年第3期1035-1037,共3页
Application Research of Computers
基金
广西回国基金资助项目(桂科字0991291)
关键词
H型缝隙耦合
微带天线
反相馈电
宽频带
交叉极化
H-shaped aperture-coupled feeding
microstrip patch
anti-phase feeding
wide-band
cross-polarization
