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Appl. Sci. 2018, 8(1), 33; doi:10.3390/app8010033

Metallic, 3D-Printed, K-Band-Stepped, Double-Ridged Square Horn Antennas

1
Department of Electrical and Computer Engineering, Faculty of Engineering, National University of Singapore, Singapore 117576, Singapore
2
College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
3
School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
4
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
*
Author to whom correspondence should be addressed.
Received: 18 October 2017 / Revised: 30 November 2017 / Accepted: 20 December 2017 / Published: 27 December 2017
(This article belongs to the Special Issue 3D Printed Antennas)
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Abstract

This paper presents K-band-stepped, double-ridged square horn antennas fabricated by metallic 3D printing technology in copper (85% copper and 15% stannum) and aluminum alloy (89.5% aluminum, 10% silicon, and 0.5% magnesium). Compared with the popular dielectric 3D-printed horn antenna, the metallic counterpart features better mechanical robustness in terms of material. Moreover, the metallic horns are printed in one piece in one run, different from the dielectric horns that are printed in split pieces and electroplated, they simplify the process and thus result in reduced cost. The agreement between the simulation and measurement results verified the antenna’s performance. Both the 3D-printed copper and aluminum alloy antenna have an impedance bandwidth across the K-band, with a maximum gain of 13.23 dBi @ 25 GHz and 13.5 dBi @ 24 GHz, respectively. The metallic, 3D-printed horn antennas are preferable alternatives to replace traditionally-fabricated antennas. View Full-Text
Keywords: 3D printing; K-band; horn antenna 3D printing; K-band; horn antenna
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Zhang, B.; Guo, Y.-X.; Sun, H.; Wu, Y. Metallic, 3D-Printed, K-Band-Stepped, Double-Ridged Square Horn Antennas. Appl. Sci. 2018, 8, 33.

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