Investigation of a patch antenna based on SRR-shaped left-handed material
This paper studies a patch antenna based on Split-Ring Resonator (SRR) shaped left-handed material (LHM) by using the method of Finite Difference Time Domain (FDTD). A patch antenna based on SRRs and notches is designed by employing traditional construction method; the results indicate that LHM has effect on miniaturization of patch antenna. Besides, there exists a wave resonance state at 7.79644 GHz, where the real part of the permittivity and permeability are all negative; its refraction index is -1. The effect has largely enhanced the electromagnetic wave's resonance intensity, and has improved the localized extent of electromagnetic energy obviously in LHM structure, resulting in a higher antenna gain, lower return loss, and better improvement of the antenna's characteristics. Due to these advantages, patch antennas can be extended for many applications.