摘要
本文提出了将阵列单元由单贴片改成缝耦合双贴片的形式，利用并矢Ｇｒｅｅｎ函数和谱域矩量法分析了单贴片及缝耦合双贴片天线的输入阻抗，考虑了阵列无线的馈电网络中不均匀性的影响，根据解积分方程所得出的微带天线贴片表面电流分布，计算出其方向图特性．结果表明，缝耦合双贴片两单元微带阵列天线的阻抗频带（ＶＳＷＲ＜２）提高到普通两单元微带阵列天线频带的２．５倍，文中实验数据与理论计算结果吻合甚好．
An antenna array using gap-coupled patches as the elements is proposed.The input impedance characteristics of single patch and gap-coupled patches are analysed by use of dyadic Green's function for grounded dielectric slab and moment method.The input impedances of gap-coupled patch array are obtained by combination with the antenna elements and the feeding networks that consist of divider tees,bends and feed line.According to the surface currents solved from the integral equation,the far field patterns of gap-coupled patch arrays are calculated.The compariscn with the ordinary rectangular patch arrays is made.The agreement between theoretical and experimental data is quite good.All microstrip antennas have been designed and fabricated on substrate with εr=2.86.h=1.5mm.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1994年第9期62-68,共7页
Acta Electronica Sinica
基金
中国自然科学基金
关键词
微带天线
贴片
天线
缝耦合
Microstrip antenna array,Patch antenna,Gap-coupled,Broadband,Input impedance
