Integrated multibeam dual-polarised planar array

作     者：Gao, SC Li, LW Leong, MS Yeo, TS 

作者机构：Natl Univ Singapore Dept Elect & Comp Engn Singapore 119260 Singapore 

出 版 物：《IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION》 (IEE Proc Microwaves Antennas Propag)

年 卷 期：2001年第148卷第3期

页      面：174-178页

核心收录：

主　　题：multiport networks microstrip antenna arrays finite difference time-domain analysis Antenna arrays FDTD method stacked microstrip patches planar antenna arrays Butler matrix microstrip circuits electromagnetic wave polarisation patch array orthogonal polarisations four-beam microstrip antenna array radiation pattern antenna radiation patterns finite-difference time-domain method 9.7 to 10.3 GHz return loss integrated multibeam dual-polarised planar array multilayered structure substrate layers multiport slot-coupled microstrip lines H-plane patterns cross-polarisation level ideal Butler pattern Other numerical methods isolation characteristics multibeam antennas 

摘      要：A novel four-beam dual-polarised microstrip antenna array at the 10GHz band is presented. By using a multilayered structure and multiport slot-coupled microstrip lines, two Butler matrix microstrip circuits corresponding to two orthogonal polarisations can be located on different substrate lavers (above and below the ground plane) and integrated with a patch array. The antenna has eight input ports corresponding to two orthogonal polarisations and four beams. The theoretical design is based on the finite-difference time-domain (FDTD) method. The measured return loss and isolation characteristics exceed 10 and 23 dB, respectively, in the 9.7-10.3GHz band. The radiation pattern is close to an ideal Butler pattern and the cross-polarisation level is lower than -18dB in the beams. Details of the antenna and its characteristics are presented.