L. I. Bakina1, A. N. Golubev2, V. L. Zefirov3, L. A. Khasyanova4, V. A. Shipulina5
1–5 Branch of Federal State Unitary Enterprise RFNC-VNIIEF “NIIIS named after Yu.Ye. Sedakov”
(Nizhny Novgorod, Russia)

Foam plastics are always widely used in antenna-feeder systems due to the low values of the dielectric constant ε and the tangent of the dielectric loss angle tgδ. Structural elements of such antennas are usually made by gluing blanks cut from expanded polystyrene plates or from filling polyurethane foam. However, these methods turned out to be low-tech due to the high labor intensity of the process, the inhomogeneity of the dielectric properties of structures and the unsatisfactory quality of the painted surface due to the low chemical resistance of these materials to solvents of paint and varnish materials.

Syntactic foams, which are a special type of gas-filled polymers, in which hollow spherical filler particles are distributed, in comparison with traditional foams, have increased mechanical strength, electrical strength, resistance to climatic factors, less density difference and better surface quality. It is the advantages of syntactic foams listed above that make them relevant materials in the manufacture of structural elements of antennas.

The purpose of the work is to study the possibility of obtaining products from low-density syntactic foam by combining an expandable polymer matrix with a filler in the form of hollow glass microspheres.

The limits of filling the polymer matrix by the filler have been established. The material dielectric characteristics (dielectric constant ε and the tangent of the dielectric loss angle tgδ) and strength (compression stress at 10% deformation) characteristics have been investigated. The resistance of the material to the influence of climatic factors has been investigated. The technology of manufacturing the product by the flooding method has been developed. Also the effect of paint and varnish coatings on surface quality and dielectric characteristics of foams of low density has been investigated. The obtained results can be used to create structural elements of antennas.

Bakina L.I., Golubev A.N., Zefirov V.L., Khasyanova L.A., Shipulina V.A. Development and research of syntactic foams for antenna devices parts manufacture. Antennas. 2023. № 2. P. 59–64. DOI: https://doi.org/10.18127/j03209601-202302-07 (in Russian)

1. Bibin J., Reghunadhan Nair C.P. Handbook of thermoset plastics. 2014. P. 511–554.
2. Ketov Yu.A., Slovikov S.V. Sintakticheskie polimernye kompozitsionnye materialy vysokonapolnennye granulirovannym penosteklom. Computational Nanotechnology. 2019. T. 6. № 3. S. 39–46. (in Russian)
3. Tikhomirov V.K. Peny. Teoriya i praktika ikh polucheniya i razrusheniya. M.: Khimiya. 1975. S. 11–15. (in Russian)
4. Samoylov V.M., Danilov E.A., Galimov E.R., et al. Production of thermally conductive carbon foams and their application in automobile transport. IOP Conference Series: Materials Science and Engineering. Kazan: Institute of Physics Publishing. 2017. P. 012062.
5. Kolosova A.S., Pikalov E.S. Sovremennye gazonapolnennye polimernye materialy i izdeliya. Mezhdunarodnyj zhurnal prikladnykh i fundamental'nykh issledovanij. 2020. № 10. S. 54–67. (in Russian)
6. Ivanov A.V., Kuftin A.A., Demareva A.I. i dr. Zashchita malogabaritnoj bortovoj apparatury ot vibratsionnykh i udarnykh vozdejstvij. Proektirovanie i tekhnologiya elektronnykh sredstv. 2015. № 2. S. 35–39. (in Russian)
7. Gupta N., Karthikeyan C.S., Sankaran S. Correlation of processing methodology to the physical and mechanical properties of syntactic foams with and without fibers. Materials Characterization. 1999. V. 43. № 4. P. 271–277.
8. Gupta N., Woldesenbet E.K. Compressive fracture features of syntactic foams-microscopic examination. Journal of Materials Science. 2002. V. 37. № 15. P. 3199–3209.
9. Gupta N., Woldesenbet E.K., Sankaran S. Studies on compressive failure features in syntactic foam material. Journal of Materials Science. 2001. V. 36. № 18. P. 4485–4491.
10. Sazonov D.M. Antenny i ustrojstva SVCh. M.: Vysshaya shkola. 1988. (in Russian)