Design and Optimization of a TEM Coaxial Horn for Wideband Operation in Millimeter Waves

Elígia Simionato, Rafael Abrantes Penchel, Sandro R. Zang, Ivan Aldaya

DOI: 10.14209/SBRT.2020.1570661682

Evento: XXXVIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2020)

Keywords: Millimeter Waves Coaxial Horn Wideband Antennas

Abstract

This work explores a framework of numerical techniques to design a wideband TEM coaxial horn for millimeter waves operation. Firstly, aperture dimensions and flare angle were determined to avoid nulls in vertical radiation pattern at θ<55°. Then, a transition to 2.92mm connector and a dielectric support for the central conductor are proposed. To enhance electromagnetic performance, Genetic Algorithm (GA) was used to optimize the transition and support dimensions. To address the antenna performance, full-wave electromagnetic analysis based on Finite Element Method was employed. The designed model presented frequency bandwidth larger than 45% (25-40 GHz) with return loss greater than 20dB.

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