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International Journal of Antennas and Propagation
Volume 2017, Article ID 7360329, 7 pages
https://doi.org/10.1155/2017/7360329
Research Article

Ka-Band Lightweight High-Efficiency Wideband 3D Printed Reflector Antenna

School of Electronic and Information Engineering, Beihang University, Beijing, China

Correspondence should be addressed to Yu Zhai; nc.ude.aaub@uyiahz

Received 29 September 2017; Revised 30 October 2017; Accepted 6 November 2017; Published 25 December 2017

Academic Editor: Yu Jian Cheng

Copyright © 2017 Yu Zhai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a lightweight, cost-efficient, wideband, and high-gain 3D printed parabolic reflector antenna in the Ka-band. A 10 λ reflector is printed with polylactic acid- (PLA-) based material that is a biodegradable type of plastic, preferred in 3D printing. The reflecting surface is made up of multiple stacked layers of copper tape, thick enough to function as a reflecting surface (which is found 4 mm). A conical horn is used for the incident field. A center-fed method has been used to converge the energy in the broadside direction. The proposed antenna results measured a gain of 27.8 dBi, a side lobe level (SLL) of −22 dB, and a maximum of 61.2% aperture efficiency (at 30 GHz). A near-field analysis in terms of amplitude and phase has also been presented which authenticates the accurate spherical to planar wavefront transformation in the scattered field.