Open AccessMetallic and dielectric hybrid 3D printed K‐band dielectric‐loaded antenna with reduced sidelobe
Author(s) -
Zhang Bing,
Zhou Lin,
Chen Qian,
Wu Li,
Zhou Yanping,
Zhu Huacheng,
Zhang Yi,
Cheng Fei,
Lu Ping,
Huang Kama,
Yang Yang
Publication year - 2020
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2019.1126
Subject(s) - materials science , optics , dielectric , waveguide , antenna (radio) , optoelectronics , aperture (computer memory) , electrical engineering , acoustics , physics , engineering
A K‐band (18–27 GHz) dielectric‐loaded waveguide antenna is designed as the feed for a parabolic reflector. The antenna is composed of a waveguide launcher and a dielectric load. The waveguide launcher is fabricated by selective laser melting using aluminium alloy. The dielectric load is fabricated by stereolithography using resin. The aperture field distribution of the antenna is tuned by extending the E ‐ and H ‐walls of the waveguide launcher to radiate a sidelobe‐reduced main beam in the boresight from −90° to + 90°. The agreement is achieved between the simulation and measurement. It has impedance bandwidth of | S 11 |<−10 from 18 to 27 GHz, the maximum gain of 11.8 dBi @ 19 GHz, and 3‐dB gain bandwidth from 18 to 25 GHz. For the sidelobe reduced, simple design and low cost, the proposed antenna features a good candidate as the feed for a parabolic reflector.