Miniaturization of patch antenna using metasurface

Abstract

In this letter, it is proposed to use metasurface (MS) to miniaturize patch antenna. The MS studied is composed of two layers, layers 1 and 2. Layer 1 has simple rectangular microstrip lines as unit cells and layer 2 has the complimentary pattern of layer 1. The MS is placed on top of and in direct contact with a small patch antenna, forming a miniaturized‐patch antenna operating at 4 GHz. For comparison, another patch antenna without using MS is designed to operate at the same frequency. Both antennas are studied using computer simulation and measurement. Results show, with the use of the MS, the patch antenna can have the size reduced by 67%, yet achieving a similar performance. The simulated and measured results in reflection coefficients, efficiencies, realized peak gains, and radiation patterns of the antennas are presented. The cable effects caused by the feeding cable used in measurement are studied. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2050–2056, 2015