DESIGN OF MICROSTRIP PATCH ANTENNA ARRAY WITH UNSLOTTED AND SQUARE-SLOTTED SPIRAL EBG STRUCTURE

Abstract

In recent years, Antenna and wireless communications have attracted much interest in the academic and
industrial worlds. In this paper, the design of microstrip patch antenna array with isolation by using square-slot two
decoupling structures including a row of Spiral EBG structure and three cross slots is proposed. Radiating patch lies on
the Roger RO3010, which is having high dielectric constant of 10.2 and loss tangent of 0.003. By changing the structure
dimensions and the substrate materials, different bandgap characteristics can be obtained. The proposed antenna is fed
with coaxial probe. The simulation results show that the significant improvement in isolation of -38.95 dB and -45.98 dB
is obtained by placing the proposed spiral EBG structure between the two square-slotted radiating patches. The proposed
antenna enhances the return loss of -12.88 dB at the 4.5 GHz and -17.29 dB at 8.8 GHz frequencies. The obtained
frequency is useful for C and X band applications. The proposed antenna were designed and simulated by using ANSYS
HFSS (version 15.0).