Design and fabrication of reconfigurable, broadband and high gain complementary split-ring resonator microstrip-based radiating structure for 5G and WiMAX applications

Abstract

Frequency reconfigurability and high gain are the two essential parameters of any antenna design, and these two parameters are successfully achieved in the antenna presented in this manuscript. The two RF switching diodes are used to alter the charge distribution over the patch region to achieve frequency reconfigurability. The fabrication carried out using the FR-4 material keeps the antenna cost low. The performance of the presented work is analyzed in terms of reflectance coefficient, total gain, bandwidth, directivity, fractional bandwidth, and normalized directivity. The novelty in the presented work is the filling of copper and liquid-based split-ring resonators in superstrate regions over the patch area to identify the performance improvement. The presented design provides the maximum frequency reconfigurability of 550 MHz, a minimum reflectance coefficient of −44.821 dB, and a maximum bandwidth of 462 MHz. The addition of superstrate layers will enhance the gain and maximum gain of 3.49 dB. The presented novel work will provide the multiband behavior which targets the different wireless communication applications like 5G communication and WiMAX.