Double-Sided Split Ring Resonator-Based Probe Feed Patch Antenna with Enhanced Bandwidth for 5G and Ku Band Applications

This paper discusses the enhancement of bandwidth in coaxial probe feed antenna achieved with double-sided complementary split ring resonator (CSRR). The split ring resonator loaded antenna is designed on an RT/duroid 5880 dielectric substrate with the relative permittivity of 2.2 and the thickness of 1.6 mm. The length and width of the substrate and antennas are 200 mm × 180 mm and 40 mm × 30 mm, respectively. The dimensions of SRR were chosen to achieve the maximum bandwidth. To determine the features expansion, a conventional antenna without complementary split ring resonator is designed using the substrate to operate at the same resonant frequency 2.4 GHz. Antenna structures like simple probe feed, single-sided SRR loaded on substrate, and double-sided SRR structures were designed, and characteristics of all structures are compared each other in terms of, return loss, VSWR, gain, and radiation pattern. From the designed antenna result, it is shown that the implementation of double-sided split ring resonators on substrate and ground can achieve the bandwidth enhancement was achieved compared to conventional simple probe feed antenna from 30 MHz to 11 GHz.