3D Printed Hemispherically Radiating Antenna for Broadband Millimeter Wave Applications

Engel L, Khouri D, Lomakin K, Hofmann A, Kleinlein M, Ullmann I, Vossiek M, Gold G (2023)


Publication Type: Journal article

Publication year: 2023

Journal

Original Authors: Lukas Engel, Danti Khouri, Konstantin Lomakin, Andreas Hofmann, Micha Kleinlein, Ingrid Ullmann, Martin Vossiek, Gerald Gold

Series: IEEE Open Journal of Antennas and Propagation vol 4

Book Volume: 4

Pages Range: 558-570

DOI: 10.1109/OJAP.2023.3279090

Abstract

Nowadays, additive manufacturing provides far-reaching possibilities for use in radio frequency components. In addition to almost unlimited freedom of design as compared to conventional manufacturing, the absence of further assembly steps is a key aspect of 3D printing. In this paper, a 3D printed monolithic antenna for millimeter wave-sensing applications is presented with a full hemispherical coverage. The antenna is designed as an ensemble of a waveguide horn antenna and a differentially fed dipole antenna. The slotted waveguide approach was utilized to improve the manufacturing quality on the waveguide inside. The influence of two optimized antenna elements, a metal plane, and a cut-out window, on the beam pattern is comprehensively investigated. A huge half power beam width of 142° in both directions, elevation and azimuth, is presented at 79 GHz and a boresight gain of 4.7 dBi was measured. The beam pattern in the frequency range from 76 to 81 GHz is studied in greater detail, where a half power beam width of at least 112° is achieved. Due to the −10 dB matching capability bandwidth of over 28 GHz, the antenna is also suitable for extremely broadband applications with a −5 dB angular width of better than 100°. Furthermore, the system design describes how to integrate the antenna into hybrid circuit designs and the manufacturing tolerances are examined. The antenna offers attractive possibilities for millimeter wave-sensing applications in the area of assisted living and industrial monitoring, especially whenever blind spots have to be avoided.

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APA:

Engel, L., Khouri, D., Lomakin, K., Hofmann, A., Kleinlein, M., Ullmann, I.,... Gold, G. (2023). 3D Printed Hemispherically Radiating Antenna for Broadband Millimeter Wave Applications. IEEE Open Journal of Antennas and Propagation, 4, 558-570. https://dx.doi.org/10.1109/OJAP.2023.3279090

MLA:

Engel, Lukas, et al. "3D Printed Hemispherically Radiating Antenna for Broadband Millimeter Wave Applications." IEEE Open Journal of Antennas and Propagation 4 (2023): 558-570.

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