A D-band 3D-Printed Antenna

Chao Gu, Steven Gao, Vincent Fusco, Gregory Gibbons, Benito Sanz Izquierdo, Alexander Standaert, Patrick Reynaert, Wolfgang Bosch, Michael Gadringer, Rui Xu, Xuexia Yang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
71 Downloads (Pure)


This paper reports the design and fabrication of a novel all-metal antenna operating in the millimeter-wave band. Based on the resonant cavity antenna (RCA) concept, the principle of antenna operation is explained, and a parametric study of several key design parameters is provided. A novel impedance matching technique is introduced to broaden the antenna return loss bandwidth. Two gain enhancement methods have been employed to achieve a more directive beam with reduced side lobes and back lobes. The D-band antenna prototypes are produced using i) all-metal printing without any post-processing; ii) dielectric printing with copper metallization applied later. Comparisons of the simulated and measured results amongst the antennas fabricated using the two additive manufacturing techniques are made. Measurement results of the two antenna prototypes show that the proposed design can achieve a 14.2% bandwidth with a maximum gain of 15.5 dBi at 135 GHz. The present work is the first D-band resonant cavity antenna fabricated using two different 3D printing methods.

Original languageEnglish
JournalIEEE Transactions on Terahertz Science and Technology
Early online date13 Apr 2020
Publication statusEarly online date - 13 Apr 2020


  • 3D printing
  • additive manufacturing
  • all-metal
  • Antenna feeds
  • Antenna measurements
  • Cavity resonators
  • D-band
  • Directive antennas
  • low THz
  • Reflector antennas
  • resonant cavity antenna
  • waveguide feed

ASJC Scopus subject areas

  • Radiation
  • Electrical and Electronic Engineering

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