Design Procedure for Compact Dual-Circularly Polarized Slotted Substrate Integrated Waveguide Antenna Arrays

In this paper, a complete design procedure of low-profile dual-circularly polarized slotted substrate integrated waveguide antennas is developed at the Ku -band frequencies. The design method includes a recipe for controlling the beam squint angle, determining the optimum slot aperture distribution,...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2019-06, Vol.67 (6), p.3839-3852
Main Authors: Kazemi, Robab, Yang, Songnan, Suleiman, Shady H., Fathy, Aly E.
Format: Article
Language:English
Subjects:
Antenna arrays
Apertures
Circular polarization
Coupling
Couplings
Cross polarization
Design
Dual-circularly polarized antennas
Elevation
Polarization
Rangefinding
Satellite broadcasting
Sidelobe reduction
Sidelobes
Slot antennas
slot array antennas
substrate integrated waveguide (SIW)
Substrate integrated waveguides
Substrates
Surface waves
Tapering
traveling-wave antennas
Waveguide antennas
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Summary:In this paper, a complete design procedure of low-profile dual-circularly polarized slotted substrate integrated waveguide antennas is developed at the Ku -band frequencies. The design method includes a recipe for controlling the beam squint angle, determining the optimum slot aperture distribution, and tapering slots coupling and excitation to increase the gain/efficiency and reduce the array sidelobe levels. The structure is designed in such a way to provide dual circular polarization and improve the radiation characteristics including reduced sidelobe levels using optimized symmetric nonuniform coupling factors and tapering the lengths of the slots. The radiation performance of the fabricated 64 \times 12 slot antenna array has been tested using a planar near-field range measurement. The beam tilt angles in elevation, peak gain, cross polarization component, and sidelobe levels have been measured and compared to previously designed 32 \times 13 and 16 \times 12 slot arrays.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2019.2905682