P.I. Bondar1

1 JSC “SIB RS” (Samara, Russia)

1 bpi@siprs.ru

Depolarization is a change in the plane of oscillation of the vector of an electromagnetic wave during its propagation. It is important to take into account the depolarization of electromagnetic waves when designing a radio path, since each component (vertical and horizontal), depending on the propagation conditions, will have its own attenuation coefficient. In this regard, the choice of one or another type of polarization (linear, circular and elliptical) for a specific radio path will have a significant impact on the level of the received signal.

In the course of this work, the most significant factors leading to the depolarization of electromagnetic waves along the propagation paths were identified. These factors included: scattering on bodies of suburban terrain (ground, forests, etc.), reflections (in combination with multipath propagation) from bodies of urban terrain, random (inclined) position of the antenna mobile terminal, Faraday rotation and dispersion in precipitation.

As a result of the analysis of depolarization factors, mathematical models were formed that, due to their applied nature, made it possible to predict the effect of depolarization on the quality of reception by a subscriber station installed on a moving object, and also showed the relevance of using antenna systems with automated polarization adaptation.

Bondar P.I. Depolarization effects when receiving radio waves on a moving object for various types and characteristics of the path. Radiotekhnika. 2024. V. 88. № 6. P. 6−14. DOI: https://doi.org/10.18127/j00338486-202406-02 (In Russian)

1. Nefedov E.I. Rasprostranenie radiovoln i antenno-fidernye ustrojstva: Ucheb. posobie dlja studentov vuzov. M.: Izdatel'skij centr «Akademija». 2010. 320 s. (in Russian)
2. Rekomendacija MSJe-R P.618-13. Dannye o rasprostranenii radiovoln i metody prognozirovanija, neobhodimye dlja proektirovanija sistem svjazi Zemlja - kosmos (in Russian).
3. Grigor'ev V.A., Shhesnjak S.S., Guljushin V.L., Raspaev Ju.A., Lagutenko O.I., Shhesnjak A.S. Adaptivnye antennye reshetki: Ucheb. posobie. V 2-h chastjah. Pod obshh. red. V.A. Grigor'eva. – SPb: Universitet ITMO. 2016. Ch. 1. 179 s. (in Russian).
4. Saldaev S.V. Issledovanie i razrabotka antennyh sistem na osnove izluchatelej smeshannoj poljarizacii dlja centrovyh stancij krupnozonovyh korporativnyh setej podvizhnoj radiosvjazi: Avtoref. diss. … kand. teh. nauk (05.12.07 – Antenny, SVCh-ustrojstva i ih tehnologii). Samara: PGUTI. 2019. 159 s. (in Russian).
5. Dvornikov S.V., Simonov A.N., Bogdanovskij C.V. Sposob pozicionirovanija bespilotnogo letatel'nogo apparata na osnove poljarizacionno-adaptivnoj obrabotki radiosignalov ot repernyh stancij. Telekommunikacii. 2017. № 8. S. 36-42 (in Russian).
6. Patent RU2699946C1 (RF), MPK H01Q 21/00 (2006.01). Mnogoluchevaja cifrovaja aktivnaja fazirovannaja antennaja reshetka s ustrojstvom kalibrovki priemoperedajushhih modulej i sposob kalibrovki. Andreev G.I., Zamarin M.E., Kornev V.V., Sozinov P.A.; opubl. 11.09.2019, Bjul. № 26 (in Russian).