Design and performance analysis of miniaturized dual-band micro-strip antenna loaded with double negative meta-materials

In recent studies, it is observed that the operating wavelength is much higher even the total size of the radiator is significantly smaller, rectangular patch antennas loaded with meta-materials whose dielectric permittivity and magnetic permeability are both negative can support resonant radiation modes in principle. During the research, it was found that there is an urgent need for reduced power electronic and radio frequency components and micro-strip patch radiators with small size have important functions in current and future wireless applications. In this article, researchers presented a miniaturized dual-band rectangular micro-strip antenna with significant gain and bandwidth. The size reduction is achieved by embedding a double negative (DNG) meta-material structure using a complementary split ring resonator (CSRR) on patch surface and grounding with wide lengthen rectangular shaped slot and four element linear pattern CSRR array as defected ground structure (DGS). The comparative results are shown in terms of size, return losses, gain and bandwidth between the antennas with and without loaded DNG meta-materials. In that performance analysis, the antenna loaded with DNG meta-materials got size shrinkage of 80.45% with respect to a conventional micro-strip antenna. It is fabricated and tested. The antenna is resonating at 3.49 GHz and 5.23 GHz with in the impedance bandwidths of 3.43–3.56 GHz and 4.93–5.75 GHz respectively. Measured results are compared with simulated results and also compared with the previous works presented in the literature. The introduced antenna in this article can be suitable candidate for 5G, Amateur satellite, WLAN and World-wide interoperability for microwave access applications.