volume | PIER Journals

Abstract

This article presents the results of the bandwidth enhancement method analysis for a stacked microstrip antenna. Based on the analysis results, a new design of a wideband, compact, high-strength antenna is proposed. Antenna operates in a wide frequency band of 4660 to 6048 MHz (~26%) with an impedance bandwidth matching of 15 dB; throughout its whole operating frequency range, the antenna gain is from 11 to 13.4 dBi. The antenna allows it to form a specific shape of radiation pattern with coverage predominantly in the upper (lower) hemisphere and a fixed main lobe deflection angle of about 4 degrees in the elevation plane. The antenna consists of a wideband E-shaped active exciter and four passive rectangular exciters placed above the conductive plane (screen). All elements are made of sheet metal (e.g., stainless steel). The antenna size is 1.4λ_max×1.4λ_max (1.6λ₀×1.6λ₀). The analysis of the characteristics of the designed antenna was per-formed using simulation in the ANSYS EM Suite. A prototype was made, and its properties were measured. The proposed antenna may be designed with a different frequency band with a matching band of about 25% and can be used as a wireless communication system repeater or small cell antenna, as a ground station antenna in unmanned aircraft systems, or for other wideband applications with high gain.

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Mr. Mikhail S. Shishkin