Directional Monopole using Holographic Surfaces with Reduced Sidelobe Level

This work presents the systematic approach for improving the radiation patterns of monopole holographic antenna. Most of the present works show unwanted high sidelobe level (SLL) for monopole holographic antenna. The radiation patterns from such designs have another beam of high gain near the main beam. By changing the location of the monopole feed over the holographic surface, this extra unwanted beam can be altered and eventually removed. This helps to improve SLL significantly. This study compares results of different designs and presents guidelines to achieve proposed design with very low SLL.