3-D Printed Wideband Millimeter-Wave Horn Antenna With Conical Radiation Pattern

• Published in: IEEE antennas and wireless propagation letters Vol. 19; no. 3; pp. 453 - 456
• Main Authors: Wu, Li, Wang, Cong, Peng, Shusheng, Guo, Yongxin
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.03.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna measurements; Antenna radiation patterns; Antennas; Apertures; Bandwidths; Broadband; Coaxial waveguides; Conical radiation pattern; Frequencies; Gain; Gold coatings; horn antenna; Horn antennas; Laser sintering; Millimeter waves; millimeter-wave (mmW); Printing; Rapid prototyping; Surface roughness; Three dimensional printing; three-dimensional (3-D) printing; Wideband
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2019.2963747

A wideband millimeter-wave (mmW) circular aperture horn antenna with a conical radiation pattern realized by the metallic three-dimensional (3-D) printing technology is presented in this letter. The proposed structure consists of a coaxial waveguide and a quadruple-ridged conical horn. The horn antenna is fabricated using a direct metal laser sintering (DMLS) technology, and both manual polishing and yellow-gold coating are employed to realize a surface roughness of Ra = 1.6161 μm. The overall size of the fabricated antenna is 20 mm × 20 mm × 15.8 mm. Experimental measurements show that a wide relative impedance bandwidth of 60.7% and a peak gain of 11.4 dBi can be achieved within the frequency band of 24.9-46.6 GHz.