Design of an Air-Filled Slot Antenna and Array for Millimeter-Wave Applications

This communication introduces a new structure of wideband slot antenna with high gain and stable radiation patterns for millimeter-wave (mmW) applications. It is the first attempt to apply an air-filled I-shape slot excited by a substrate-integrated-waveguide (SIW) feed. The slot can achieve lower...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2022-08, Vol.70 (8), p.7217-7222
Main Authors: Guo, Qing-Yi, Wong, Hang
Format: Article
Language:English
Subjects:
Air-filled I-shape slot
Antenna arrays
Antenna feeds
Antenna radiation patterns
Antennas
Bandwidths
Broadband antennas
Electric fields
Gain
High gain
Impedance
Millimeter waves
millimeter-wave (mmW)
single-layered
slot antenna
Slot antennas
Substrates
Waveguides
Wideband
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Summary:This communication introduces a new structure of wideband slot antenna with high gain and stable radiation patterns for millimeter-wave (mmW) applications. It is the first attempt to apply an air-filled I-shape slot excited by a substrate-integrated-waveguide (SIW) feed. The slot can achieve lower Q -factor contributing to a wider bandwidth. In addition, the feature of even electric field distributions across the operating bandwidth produces very stable gain performance for the proposed antenna. The proposed antenna is realized using a single-layered PCB substrate with plated-through-hole technology, which is cost effective and easy to fabricate. In addition, a 1\times8 antenna array based on the proposed antenna element is developed with a planar 1-8 SIW feeding network. The measurement results show that the proposed array can achieve an impedance bandwidth of 36.6% from 58 to 84 GHz with a peak gain of 16 dBi. These performances ensure that the proposed antenna array is a promising candidate for mmW communications.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2022.3145470