Indian Journal of Science and Technology

Abstract

Objective: Design with analysis of a new low profile co-planar waveguide fed antenna generally suitable to reduce polarization diversity problems in dual band applications is addressed in this work. Methods/Analysis: The designed antenna consisting of two similar monopoles that are been printed on a low loss substrate material with 3mm spacing and placed perpendicular to one another. H-shaped slots are placed on the ground plane as defected ground structure. Multiple input multiple output technology is incorporated to reduce the polarization diversity in the current structure. HFSS tool is used to model and simulate the proposed antenna model. Findings: In this paper, four models have been proposed and their S-parameters have been compared along with their gain. To enhance the gain characteristics of the proposed models, H-Shaped slots have been incorporated. The experimental result of the proposed Ultra wideband antenna of Model 4 is in good correlation with the simulated results from HFSS. Novelty/Improvement: Coplanar wave guide fed MIMO antenna is designed in this work. U-shaped radiating elements are used in the design with proper impedance matching of fifty ohms at the feed point. An H-Shaped slot placed on the ground plane will improve the proper impedance matching characteristics and radiation characteristics of the antenna. 
Keywords: Coplanar Waveguide feeding (CPW), Dual Wideband, Gain, Multiple Input Multiple Output (MIMO), Polarization Diversity