S.D. Krekov1, N.M. Boev2

1,2 Siberian federal university (Krasnoyarsk, Russia)

1,2 L.V. Kirensky Institute of Physics SB RAS (Krasnoyarsk, Russia)

1 sdk@kirensky.ru, 2 boev@iph.krasn.ru

This paper provides information about near-field magnetic communication systems (NFMCS). In NFMCS the alternating magnetic field is used to transmit information. The advantage of these systems is a low effect conductivity and permittivity of the propagation medium on the signal attenuation coefficient. On other hand, attenuation of the magnetic field in free space is higher in comparison with electromagnetic waves attenuation. Therefore, NFMCS are used in underground and underwater applications. Magnetic communication systems have advantages over optical and acoustic communication systems: low signal propagation delay; simultaneous wireless communication and power transfer; absence of acoustic and optical contamination of the environment. Kirensky Institute of Physics studied NFMCS in cooperation with JSC «SPE «Radiosviaz». As a result, theoretical knowledge and practical experience were obtained. The purpose of this work is to develop a software and hardware applications for designing NFMCS. The software and hardware applications are incluides of the link-budget calculation program and demonstration communication system prototype. In the process of development the accumulated knowledge was used and link-budget calculation method was created to achieve desired objective. Link-budget calculation method was implemented in the computer application with a graphical user interface. The calculation results of this application were confirmed using the developed and manufactured the simplex voice channel prototype. The prototype includes two modems with FSK. Communication range when using an induction antenna with 17 cm diameter was 5 meters. A range is enough to demonstrate communication system. To increase the communication range, it is necessary create a power amplifier. In this application a power amplifier was released using by two MOSFET gate drivers. Using developed software and hardware applications the Institute of Physics staff will be able to answer questions about the technical specification for NFMCS. The introduction of this paper provides basic information about NFMCS. In first part described link-budget calculation method. The second part of article provides a description of the graphical user interface for developed program. The second section also explains the calculation link-budget for demonstration communication system. The hardware part of the software and hardware applications that was developed is described in the third section. The comparing of calculations and practical are presented in conclusion.

Krekov S.D., Boev N.M. Software and hardware applications for near-field magnetic communication systems design. Achievements of modern radioelectronics. 2023. V. 77. № 12. P. 60–72. DOI: https://doi.org/10.18127/j20700784-202312-08 [in Russian]

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