基于高阻抗表面材料电磁特性的矩形波导

Rectangular waveguide based on electromagnetic characteristics of high impedance surface material

基于高阻抗表面材料奇异的反射相位性质,以此高阻抗表面为一壁构建一矩形波导。将一偶极子天线置于波导中,采用时域有限差分(FDTD)数值模拟得到偶极子天线的回波损耗以及H面和E面的辐射方向图。研究结果表明:置于此波导中的偶极子天线的增益大大提高,而且体现出良好的辐射方向性;不同长度的偶极子天线的回波损耗及高阻抗表面的反射相位有助于确定矩形波导的工作波模频带;以高阻抗表面为壁构建的矩形波导,可以克服谐振条件对波导尺寸的限制。

Based on singular reflection phase properties, the high impedance surface of the high impedance surface materials was used to construct rectangular waveguide. A dipole antenna was put in the waveguide, and the finite difference time domain （FDTD） was used to simulate the return loss and H-plane and E-plane radiation pattern of the dipole antenna. The results show that the dipole antenna gain is greatly enhanced, and the good radiation direction is embodied. Returning loss of the dipole antenna of different lengths and reflection phases of the high impedance surface are helpful to determine the working frequency band of the rectangular waveguide modes, and high impedance surface for wall construction in rectangular waveguide can remove the resonant condition on the limit of the waveguide size.