Gain and bandwidth improvement of microstrip patch antenna using Complementary G-Shape Split Ring Resonator

In this paper, a periodic structure of Complementary G-Shape Split Ring Resonator (CGSRR) is proposed to improve the gain of microstrip patch antenna (MPA). CGSRR is designed to work as a left-handed material (LHM) with negative permittivity and permeability in the frequency band of operation. The MPA is designed with 50 Ω co-axial probe feed to operate at frequency f₀=10 GHZ. Array of CGSRRs are loaded around the rectangular patch to improve the gain and bandwidth of the MPA. The presence of the CGSRRs around the patch antenna improves the gain by 2.5 dB over the original values of the total gain of the conventional antenna. CGSRR also increases the fractional bandwidth of the antenna from 3.5% to 5.1%. The proposed antenna is implemented and fabricated by the method of photolithography process. Experimental results are presented to show the performance of the antenna. The experimental results agree well with the simulation ones.