Journal of Radio Electronics. eISSN 1684-1719. 2026. ¹7

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DOI: https://doi.org/10.30898/1684-1719.2026.7.10

 

 

 

QUASI-OPTICAL SYSTEM FOR A MULTIBAND VLBI INSTRUMENT
of millimiter wavelength

 

S.Yu. Turygin¹, I.V. Belkovich², D.A. Sorokin²

 

¹JSC "Design Bureau of Radio Engineering and Electronics",
141190, Russia, Moscow region, Fryazino, Academician B.A. Vvedensky Square, 4

²Astrospace Center of the P.N. Lebedev Physical Institute of the RAS,
119991, Russia, Moscow, Profsoyuznaya str., 84/32

 

The paper was received May 14, 2026.

 

Abstract. Quasi-optical system design of a space-based cryogenic multiband receiver for the ground-to-space very-long-baseline radio interferometer of the Millimetron space observatory operating in the 7 mm, 3 mm, 1,3 mm and 0.8 mm bands is presented in the paper. Quasi-optical system of the instrument includes a number of reflecting mirrors, frequency-selective mirrors and receiving horns. The synthesis of the mirrors was carried out using the Dragone criterion for compensating distortions on asymmetric mirrors. In addition to the classical quasi-optical approach, numerical electromagnetic simulation with the methods of integral equations and physical optics is used for analysis. The mode matching method is used to synthesize horn feeds. The final calculation of the quasi-optics with the telescope, including an estimation of the aperture efficiency, was performed using the physical optics.

Key words: radio astronomy, very long baseline interferometry, quasi-optics, horns, millimeter waves.

Corresponding author: Belkovich Igor Viktorovich, belkovich@asc.rssi.ru

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For citation:

Turygin S.Yu., Belkovich I.V., Sorokin D.A. Quasi-optical system for a multiband VLBI instrument of millimiter wavelength. // Journal of Radio Electronics. – 2026. – ¹. 7. https://doi.org/10.30898/1684-1719.2026.7.10 (In Russian)