A Millimeter-Wave Fan-Shaped Beam Cavity-Backed Slot Antenna based on ENZ Medium

Evandro Cesar Vilas Boas, Rausley Adriano Amaral de Souza, Felipe Augusto Pereira de Figueiredo

DOI: 10.14209/sbrt.2025.1571137590

Evento: XLIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2025)

Keywords:

Abstract

This work proposes a fan-shaped beam cavity-backed slot antenna based on epsilon-near-zero (ENZ) medium for millimeter waves. The air-filled metallic cavity is doped by FR4 dielectric slabs enclosed by four metallic rods. The cavity shape is semi-cylindrical and fed by a commercial single waveguide-to-coaxial transition (WR28), exciting a slot at 26.5GHz with a sectorial E-plane radiation pattern. The antenna's radiation pattern is shaped by a rectangular wing-based reflector in a fan-like beam along its impedance bandwidth of 7.31GHz (25.14GHz to 27.05GHz). The antenna numerical analyses show a fan beam of 90-degrees, maximum gain of 10dBi and ripple below 1dB.

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