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Appl. Sci. 2018, 8(8), 1410; https://doi.org/10.3390/app8081410

3D Printed High Gain Complementary Dipole/Slot Antenna Array

1
State Key Laboratory of Millimeter Waves, City University of Hong Kong, Kowloon, Hong Kong
2
State Key Laboratory of Millimeter Waves, Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong
*
Author to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 13 August 2018 / Accepted: 15 August 2018 / Published: 20 August 2018
(This article belongs to the Special Issue 3D Printed Antennas)
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Abstract

By employing the complementary dipole antenna concept to the normal waveguide fed slot radiator, an improved antenna element with wide impedance bandwidth and symmetrical radiation patterns is developed. This is achieved by mounting two additional metallic cuboids on the top of the slot radiator, which is equivalent to adding an electric dipole on top of the magnetic dipole due to the slot radiator. Then, a high-gain antenna array was designed based on the improved element and fabricated, using 3D printing technology, with stable frequency characteristics operated at around 28 GHz. This was followed by metallization via electroplating. Analytical results agree well with the experimental results. The measured operating frequency range for the reflection coefficient ≤−15 dB is from 25.7 GHz to 29.8 GHz; its corresponding fractional impedance bandwidth is 14.8%. The measured gain is approximately 32 dBi, with the 3 dB beamwidth around 4°. View Full-Text
Keywords: waveguide slot antenna; antenna array; complementary antenna; 3D printing; electroplating waveguide slot antenna; antenna array; complementary antenna; 3D printing; electroplating
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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 (CC BY 4.0).
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MDPI and ACS Style

So, K.K.; Luk, K.M.; Chan, C.H.; Chan, K.F. 3D Printed High Gain Complementary Dipole/Slot Antenna Array. Appl. Sci. 2018, 8, 1410.

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