Journal of Radio Electronics. eISSN 1684-1719. 2025. №10

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DOI: https://doi.org/10.30898/1684-1719.202.5.10.9

KA-BAND CIRCULARLY POLARIZED
FEED ANTENNA MANUFACTURED USING SLM

N.O Sivov, K.V. Lemberg, K.I. Pominov, A.A. Gorchakovsky, D.A. Shabanov

Kirensky Institute of Physics SB RAS,
660036, Russia, Krasnoyarsk, Akademgorodok str., 50/12

The paper was received October 10, 2025.

Abstract. This paper presents the development of a Ka-band horn feed with an integrated septum polarizer manufactured by selective laser melting of an aluminum alloy. The study highlights specific design considerations dictated by additive manufacturing, including printing orientation, support placement, and post-processing. The influence of surface roughness on thermal losses and cross-polarization isolation is analyzed. The fabricated feed demonstrates excellent performance, achieving high port isolation (>25 dB), low reflection coefficients (better than −20 dB), and cross-polarization isolation exceeding 20 dB across the operating frequency bands. These results confirm that selective laser melting is a promising technology for producing compact and integrated microwave components with complex internal geometries.

Key words: Ka-band, selective laser melting (SLM), horn antenna, septum polarizer, circular polarization, additive manufacturing.

Financing: This work was supported by the state assignment of the Federal Research Center KSC SB RAS (scientific topic code FWES-2025-0028)

Corresponding author: Sivov Nikita Olegovich, nsivov@kirensky.ru

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For citation:

Sivov N.O., Lemberg K.V., Pominov K.I., Gorchakovsky A.A., Shabanov D.A. Ka-band circularly polarized feed antenna manufactured using SLM. // Journal of Radio Electronics. – 2025. – №. 10. https://doi.org/10.30898/1684-1719.2025.10.9