Multi-Band Rectangular Hybrid Antennas Loaded with Inter-Digital Structure Slot

In this paper, two rectangular multi-band hybrid antennas are proposed. Modified Inter-digital structure slot is loaded on top of DRA to achieve multi-functional capability for sub 6 GHz wireless applications. The tri-band hybrid antenna with modified inter-digital structure resonates at 2.93 GHz, 3.26 GHz & 5.5 GHz and consequent Return Loss (RL) bandwidths are 40 MHz(2.91-2.95 GHz), 60 MHz (3.23-3.29 GHz) and 230 MHz (5.37-5.6 GHz) respectively. The proposed quad-band hybrid antenna resonates at 2.48 GHz, 2.84 GHz, 3.26 GHz and 5.5 GHz and resultant RL bandwidths are 40 MHz, 40 MHz, 60 MHz and 220 MHz respectively. The field analysis and parametric study of the proposed hybrid antennas are presented using Ansys-HFSS Electro-magnetic solver. The gains obtained for the proposed antennas are more than 4 dBi at all the resonances that have been occurred.