A Low-Profile High-Gain Slotted Waveguide Antenna Array With Grooved Structures

This letter reports the development of a low-profile and high-gain slotted waveguide antenna array, aiming the FR2 5G frequency range and operating in the 26 GHz band. The proposed array relies on 27-sloped slots, positioned onto the WR28 standard waveguide broadside wall with six pairs of metal gro...

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Bibliographic Details
Published inIEEE antennas and wireless propagation letters Vol. 19; no. 12; pp. 2107 - 2111
Main Authors Vilas Boas, Evandro Cesar, Mittra, Raj, Cerqueira Sodre, Arismar
Format Journal Article
LanguageEnglish
Published New York IEEE 01.12.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antenna array
Antenna arrays
Antenna radiation patterns
Antennas
Bandwidth
Bandwidths
fifth-generation (5G)
Frequency ranges
Gain
grooved structures
High gain
Microstrip antenna arrays
millimeter waves (mm-waves)
Reflection coefficient
Slot antennas
Waveguide antennas
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Summary:This letter reports the development of a low-profile and high-gain slotted waveguide antenna array, aiming the FR2 5G frequency range and operating in the 26 GHz band. The proposed array relies on 27-sloped slots, positioned onto the WR28 standard waveguide broadside wall with six pairs of metal grooved structures placed parallel to its axis. Experimental results demonstrate the achievement of 3.41% fractional bandwidth from 25.88 to 26.78 GHz, 27.7 dBi gain and half-power beamwidths in the azimuth and elevation planes equal to 10° and 3°, respectively. The use of metal-grooved structure realizes a gain enhancement of 9 dB, and results in a high-gain antenna array, which is based on a very simple and unique excitation.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2020.3023698