Sub-6 GHz Microstrip Antenna: Design and Radiation Modeling

TL;DR

This paper analyzes the design and radiation modeling of a circularly polarized microstrip antenna operating at 5.80 GHz, using FDTD simulations in various dimensions and media to optimize performance and validate results.

Contribution

It introduces a comprehensive framework combining antenna design parameters with FDTD-based radiation modeling in free space and dielectric media.

Findings

Optimized antenna parameters for 5.80 GHz operation

FDTD simulations accurately model radiation in different media

Analytic solutions confirm simulation validity

Abstract

This paper presents a global framework analysis of a microstrip antenna design circularly polarized with an operating frequency of 5.80 GHz and a bandwidth of at least 500 MHz. We evaluate the optimal antenna parameters to design requirements. Capitalizing on these parameters, we simulate the radiation model of this antenna using the Finite Difference Time Domain (FDTD) technique assuming one, two, and three dimensions. The propagation medium is assumed to be a free space bounded by absorbing boundaries, and perfect matched layer (PML). The FDTD-1D is considered in free space while FDTD-2D and 3D are considered both in free space and in a free space-medium containing either dielectric sphere or cylinder in the center. In this case, we model the incident and the scattered electromagnetic fields reflected back from hitting the dielectric object. Moreover, the microstrip antenna radiates an electromagnetic pulse either in the middle or at one end of the medium and the sources considered are Gaussian pulse and plane wave. Finally, we provide the analytic solutions of the propagation models to confirm the accuracy of the FDTD simulation technique.