Open-ended Ridged Waveguide Elements for LEO Direct Radiating Arrays in Ka-band

Carlos Vazquez-Sogorb; Roger Montoya-Roca; Giuseppe Addamo; Oscar Peverini; Giuseppe Virone

doi:10.20944/preprints202407.0258.v1

Preprint Article Version 1 This version is not peer-reviewed

Version 1 : Received: 2 July 2024 / Approved: 2 July 2024 / Online: 2 July 2024 (15:53:44 CEST)

This paper presents an extensive performance analysis of open-ended waveguide elements for direct radiating arrays with high scan angle (± 50º/60º). The evaluated designs are based on square and hexagonal apertures loaded with ridges. Both square and triangular lattices are considered in the framework of Ka-band downlink design requirements for future LEO mega-constellations. The parameter space defined by the monomodal condition has been explored to find an optimum value for each structure. The analyses are validated with both infinite and finite full-wave models in terms of active reflection coefficient, scan loss and cross-polar discrimination.

Open-ended waveguide; Direct radiating array; LEO satellite; Satellite communication; Non-terrestrial networks; Ka-band; Phased array antenna

Engineering, Telecommunications

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Open-ended Ridged Waveguide Elements for LEO Direct Radiating Arrays in Ka-band

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