On the Additive Manufacturing of Conformal Slotted Waveguide Antennas

We present here the design and 3D-printing of Conformal Slotted Waveguide Antenna Arrays (CSWAA) in Ku-band. These solutions are appealing candidates for applications where 3-D Adaptive Electrically Scanned Array (AESA) antennas are employed in conformal surfaces, like airplanes, for beam-steering....

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Published in2023 12th International Conference on Modern Circuits and Systems Technologies (MOCAST) pp. 1 - 4
Main Authors Stoumpos, Charalampos, Le Gouguec, Thierry, Allanic, Rozenn, Garcia-Vigueras, Maria, Abedrabba, Sarra, Fourn, Erwan, Merlet, Thomas, Amiaud, Anne-Charlotte
Format Conference Proceeding
LanguageEnglish
Published IEEE 28.06.2023
Subjects
3-D printing
Adaptive arrays
Additive Manufacturing
Antenna measurements
conformal antenna
Connectors
Measurement by laser beam
Selective Laser Melting (SLM)
Slot antennas
slotted waveguide antenna array
Stereolithography (SLA)
transition
Waveguide lasers
Waveguide transitions
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DOI10.1109/MOCAST57943.2023.10176730

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Summary:We present here the design and 3D-printing of Conformal Slotted Waveguide Antenna Arrays (CSWAA) in Ku-band. These solutions are appealing candidates for applications where 3-D Adaptive Electrically Scanned Array (AESA) antennas are employed in conformal surfaces, like airplanes, for beam-steering. First, a non-optimized antenna with a coaxial to ridged waveguide transition is designed and manufactured in Stereolithography (SLA). Then the antenna is later metallized and measured. The problematic aspects of the complex transition are further optimized by a second highly compact antenna concept which employs a direct coaxial feeding mechanism. The second and optimized CSWAA is fabricated in Selective Laser Melting (SLM) and is verified experimentally. Both numerical and measurement results show a close agreement. The proposed CSWAA presents return losses above 10 dB and realized gain above 14 dBi over a relative bandwidth of 8%.
DOI:10.1109/MOCAST57943.2023.10176730