Gain Enhanced Miniaturized Microstrip Patch Antenna Using Metamaterial Superstrates

摘要

In this paper, a high-gain miniaturized microstrip patch antenna was designed using engineered magnetic materials as both substrate and superstrate. The proposed antenna was numerically analyzed, fabricated, and measured. To obtain high permeability and permittivity, an engineered magnetic material with Electric-LC Resonators in the superstrate layer and 2nd kind Hilbert fractals in the substrate were used. Equivalent material parameters technique was also used for efficient simulation of metamaterials in the substrate and the superstrate. The simulation and measurement results show a gain improvement of 8.1 dB, and a miniaturization factor of 4.8 for the miniaturized antenna at 534 MHz. Additionally, using superstrate causes to reduce antenna size to 170 x 170 x 37 mm(3) and patch size less than lambda/100 resonance frequency.