Microwave Electromagnetic Radiation Research Articles

Multispectral smart window: Dynamic light modulation and electromagnetic microwave shielding

A novel multispectral smart window has been proposed, which features dynamic modulation of light transmittance and effective shielding against electromagnetic microwave radiation. This design integrates liquid crystal dynamic scattering and dye doping techniques, enabling the dual regulation of transmittance and scattering within a single-layer smart window. Additionally, the precise control of conductive film thickness ensures the attainment of robust microwave signal shielding. We present a theoretical model for ion movement in the presence of an alternating electric field, along with a novel approach to manipulate negative dielectric constant. The proposed model successfully enables a rapid transition between light transparent, absorbing and haze states, with an optimum drive frequency adjustable to approximately 300 Hz. Furthermore, the resistive design of the conductive layer effectively mitigates microwave radiation within the 2−18 GHz range. These findings offer an innovative perspective for future advancements in environmental construction.

Effect of microwave radiation on adult neurogenesis and behavior of prenatally exposed rats

Postnatal neurogenesis appears to be highly sensitive to environmental factors, including microwave electromagnetic radiation (MWR). Here, we investigated the impact of MWR during intrauterine development on juvenile and adult neurogenesis in the rostral migratory stream (RMS) and the dentate gyrus of the hippocampus in the rat brain, as well as its effect on animal behavior. Female rats were exposed to MWR at a frequency of 2.45 GHz for 2 hours daily throughout pregnancy. The offspring of irradiated mothers survived to either juvenile age or adulthood. The brains of the rats were subjected to morphological analysis, assessing cell proliferation and death in both neurogenic regions. In the RMS, the differentiation of nitrergic neurons was also investigated. The effect of MWR on behavior was evaluated in rats surviving to adulthood. Prenatal MWR exposure caused significant changes in the number of proliferating and dying cells, depending on the age of the animals and the observed neurogenic region. In addition, MWR attenuated the maturation of nitrergic neurons in the RMS in both juvenile and adult rats. Morphological alterations in neurogenesis were accompanied by changes in animals’ behavior. Affected neurogenesis and changes in animal behavior suggest a high sensitivity of the developing brain to MWR.

Charcoal-containing microwave electromagnetic radiation absorbers with relief surface

A new technology for manufacturing microwave electromagnetic radiation (EMR) absorbers characterized by a geometrically inhomogeneous surface is presented. The novelty of the presented technology lies in the use of radiotransparent polymer forms with hemispherical depressions of the same volume, which are the component for the formation of the surface layer of absorbers. The technology consists in filling these molds with a mixture of powdered activated (birch) charcoal and the binder in the liquid phase and further drying it in the forms. Compared with analogues, the developed technology is characterized by low complexity of reproduction. Most of the time required to implement the presented technology is associated with the drying process of a mixture of powdered activated birch charcoal and a binder. The experimentally established patterns of changes in the values of electromagnetic radiation reflection and absorption coefficients in the frequency range 1.0–28.0 GHz of the absorbers manufactured in accordance with the presented technology are provided, depending on the type of binder contained in them (polyvinyl acetate aqueous solution, gypsum aqueous solution, polyurethane mastic). It was determined that the most effective of the EMR absorbers studied in the course of establishing the indicated patterns are those ones that contain an aqueous solution of polyvinyl acetate. Electromagnetic radiation absorption coefficient values in the frequency range 1.0–28.0 GHz of such absorbers vary from 0.75 to 0.99. In addition, the mass per unit area of such absorbers is 1.5–2.0 times less than the mass per unit area of absorbers containing an gypsum aqueous solution or polyurethane mastic. Microwave EMR absorbers manufactured using the presented technology are characterized by higher mechanical strength, as well as lower cost compared to analogues and are recommended for use in the creation of anechoic chambers.

Effect of an ultra-high frequency electromagnetic field on the physical properties of spelt grain

Since spelt grain is one of the most promising non-conventional types of plant material for healthy food products, it is important to investigate environmentally friendly technologies for post-harvest processing of this crop. The purpose of this study was to determine the physical changes in spelt wheat grain under the influence of microwave electromagnetic radiation. The study presented the results of research on how the electromagnetic field of ultra-high frequencies and the duration of processing affect the quality characteristics of spelt grain of the Holikovska wheat variety harvested in Cherkasy region in 2020 and 2021. During the experimental study, physical methods of grain quality research were used following the developed and existing methods and industry standards. The complex structural changes in spelt grains during their treatment with an ultra-high frequency electromagnetic field with an increase in grain size, shape, and volume were investigated. Analysis found that the grain fractional composition changed towards reducing the passage depending on the processing time by 1.5-4.0 times. It was found that the treatment of spelt grain with high-frequency waves for 20-180 s reduces grain moisture content by 2-36% compared to the control, with a significant decrease after the first minute of exposure. Moreover, during the first minute of intensive grain heating, the grain temperature increased, while during the next two minutes, the intensity of grain heating decreased by 1.5-3 times. It was also proved that irradiation with ultra-high frequencies decreased the number of vitreous grains, while the number of floury grains, on the contrary, increased. The analysis also found that the vitreousity of treated spelt wheat grain by electromagnetic waves of ultra-high frequency decreases by 1.3-1.5 times during the last 2-3 minutes of treatment. The developed recommendations for the use of ultra-high frequency electromagnetic waves in the technological processes of storage and processing of spelt grain can be used by enterprises to intensify the production of environmentally friendly products

Mathematical Modeling of Resonance Interaction of the Microwave and Terahertz Electromagnetic Radiation with 3D Arrays of Magnetically Functionalized Carbon Nanotubes

Mathematical Modeling of Resonance Interaction of the Microwave and Terahertz Electromagnetic Radiation with 3D Arrays of Magnetically Functionalized Carbon Nanotubes

Research on the exposure of radio-electronic equipment to ultrashort electromagnetic pulses and microwave radiation

The paper considers two methods of exposure of radio-electronic equipment to ultrashort electromagnetic pulses. The methods of exposure to ultrashort electromagnetic pulses differ in the delivery of radiation energy to the IC. According to the first method, the circuit is placed in an electromagnetic field with the set amplitude frequency response. The second method implies that microwave pulses are injected directly onto the circuit pins. Thus, the main research is aimed at an experimental assessment of the stability of radio equipment and its components to ultrashort electromagnetic pulses and microwave radiation. It describes various dependences of the malfunction index for some integrated circuits (ICs) on the duration of ultrashort electromagnetic pulses and microwave radiation energy. ATmega32A and STM32F microcontroller ICs are used in the research. The paper presents findings on the stability of the IC to the exposure to of ultrashort electromagnetic pulses and microwave radiation about the manufacturing technology, i.e. the housing manufacturing techniques. Following the research, the main feature characterizing the effectiveness of exposure of microcontrollers is the amplitude of the impacting pulses.

Using Modeling to Select the Type of Microwave Field Emitter for Dense-Layer Grain Dryers

The microwave field is used for drying and disinfecting grains during the pre-sowing seed treatment. The use of a microwave field in these installations leads to an increase in their productivity and a decrease in the energy consumed by them. In grain dryers, where the grain moves in a dense layer without being loosened, one of the challenges in using microwave fields is ensuring sufficient uniformity of the field distribution. In this article, waveguide design options that introduce microwave radiation into the grain layer are discussed. The objective of this study was to use application software to find the optimum type of transmitter from the three options presented. A mathematical simulation of the electromagnetic field distribution was performed with the use of CST Microwave Studio software 2019 in order to evaluate and compare horn-type, rectangular, and semicircular waveguides. The data on the standing wave ratio and radiation efficiency of these types of waveguides have been reported. The specific features of the microwave electromagnetic field distribution and radiation power in the output of these waveguides have been described. The results of mathematical simulations revealed that semicircular waveguides with slot-type radiators are preferable for processing dense grain layers.

Evaluation of the Influence of Super-Low-Intensity Microwave Radiations on Mesenchimal Stem Cells

This paper is devoted to the analysis of advanced scientific research on the role of super-low-intensity microwave effects on biological objects in form of stem cells. The scientific work has been performed by a translational team of researchers, including doctors, engineers, radio physicists, and programmers. Synchropulsar AQUA was used as a source of super-low intensity <10 μW of electromagnetic microwave radiation in the 1 GHz band. During the study, it was found that the number of cells is reduced in the experimental groups compared with the control. In the control it was calculated 3.1 x106 cells/mL, in the low frequency biomodulation mode it was found 2.5×106 cells/mL; in the continuous generation mode it was revealed 2.1 x106 cells/mL. Assessment of the fluorescence intensity showed that the activity of mitochondria is higher in the experimental group under irradiation with mode modulation by biotropic parameters – 12.40 conventional units (cu). When using regime continuous generation, the activity of mitochondria was 9.33 cu. In the control group, mitochondrial activity was 10.74 cu.

Electromagnetic Radiation Effects on MgO-Based Magnetic Tunnel Junctions: A Review.

Magnetic tunnel junctions (MTJs) have been widely utilized in sensitive sensors, magnetic memory, and logic gates due to their tunneling magnetoresistance. Moreover, these MTJ devices have promising potential for renewable energy generation and storage. Compared with Si-based devices, MTJs are more tolerant to electromagnetic radiation. In this review, we summarize the functionalities of MgO-based MTJ devices under different electromagnetic irradiation environments, with a focus on gamma-ray radiation. We explore the effects of these radiation exposures on the MgO tunnel barriers, magnetic layers, and interfaces to understand the origin of their tolerance. This review enhances our knowledge of the radiation tolerance of MgO-based MTJs, improves the design of these MgO-based MTJ devices with better tolerances, and provides information to minimize the risks of irradiation under various irradiation environments. This review starts with an introduction to MTJs and irradiation backgrounds, followed by the fundamental properties of MTJ materials, such as the MgO barrier and magnetic layers. Then, we review and discuss the MTJ materials and devices' radiation tolerances under different irradiation environments, including high-energy cosmic radiation, gamma-ray radiation, and lower-energy electromagnetic radiation (X-ray, UV-vis, infrared, microwave, and radiofrequency electromagnetic radiation). In conclusion, we summarize the radiation effects based on the published literature, which might benefit material design and protection.

Influence of Microwave Radiation on Pollutant Removal and Biomethane Production Efficiency in Anaerobic Treatment of High-Load Poultry Wastewater

The growing consumption of poultry meat has spurred the development of meat-processing plants and an associated rise in wastewater generation. Anaerobic digestion is one of the preferred processes for treating such waste. The current push towards biogas upgrading and out-of-plant use necessitates new, competitive ways of heating digesters. One such alternative is to use electromagnetic microwave radiation (EMR). The aim of the study was to assessment how EMR used as a heat source impacts the anaerobic processing of high-load poultry slaughterhouse wastewater (H-LPSW) and its performance. Microwave heating (MWH) was found to boost the CH4 fraction in the biogas under mesophilic conditions (35 °C) as long as the organic load rate (OLR) was maintained within 1.0 kgCOD/dm3·d to 4.0 kgCOD/dm3·d. The best performing variant—EPM heating (55 °C), OLR = 3.0 kgCOD/dm3·d, HRT = 5 days—produced 70.4 ± 2.7% CH4. High COD and TOC removal, as well as the highest biogas yields, were achieved for loadings of 1.0 gCOD/dm3·d to 4.0 gCOD/dm3·d. Effluent from the EMR-heated reactors (1.0 gCOD/dm3·d) contained, on average, 0.30 ± 0.07 gO2/dm3 at 55 °C and 0.38 ± 0.10 gO2/dm3 at 35 °C. The corresponding COD removal rates were 97.8 ± 0.6% and 98.1 ± 0.4%, respectively. The 5.0 gCOD/dm3·d and 6.0 gCOD/dm3·d OLR variants showed incremental decreases in performance. Based on the polymerase chain reaction results of 16S rDNA analysis, diversity of bacterial communities were mostly determined by OLR, not way of heating.

Study of the features of modeling microwave vacuum evaporation

Evaporation is the most common concentration method. The complete reuse of latent thermal energy by means of mechanical recompression is the most technologically efficient method of operation of evaporators. This method requires much less electricity to compress the secondary steam compared to the heat of the secondary steam. In this scheme, the energy released during steam condensation can be used to heat the initial solution, which makes it possible to achieve the reuse of thermal energy at the level of 95%. Thus, during the the evaporation process implementation, when energy is supplied by electromagnetic microwave radiation, conditions are created for the initiation of vaporization in the entire liquid volume, which will avoid product overheating in the thermal boundary layer due to the absence of such. This allows to get a product of high concentration, without the taste of “cooking”, without changing color and flavor. When modeling these processes, boundary conditions of the third kind are replaced by boundary conditions of the second kind. Considering the proposed hypothesis, a process model can be considered, assuming the presence of internal energy sources evenly distributed in the product volume. This opens up the possibility of using deterministic mathematical models, provided that the corresponding initial and boundary conditions are determined. As a result of generalization of the experimental modeling results, a model in a criterion form has been obtained, which allows calculating a microwave vacuum-evaporation apparatus of periodic action for solutions containing polar molecules. The model in the range of dimensionless pressure 2 ≤ P ≤ 22, and at the level of dimensionless heat of the phase transition 1 ≤ R ≤ 4.56 provides accuracy with a maximum deviation of ± 8%.

Automated SAR Image Segmentation and Classification Using Modified Deep Learning

Synthetic Aperture Radar (SAR) represents a type of active remote sensing technology that uses microwave electromagnetic radiation to produce and send data to the surface of a target location. SAR imaging is frequently used in national security applications since it is unaffected by weather, geographical location, or time. In this system, many approaches are examined, to improve automation for segmentation and classification. The utilization of Deep Neural Networks (DNNs) to classify SAR images has gotten a lot of attention, and it usually requires several layers of deep models for feature learning. With insufficient training data, however, the DNN will get affected by the overfitting issue. The major purpose of this work is to make a development on introducing a new framework for SAR image segmentation and categorization using deep learning. Owing to the coherent nature of the backscattering signal, SARs create speckle noise in their images. If the image has noisy material, classification becomes more challenging. Hence, the pre-processing of the images is employed by linear spatial filtering to remove the noise. Further, the Optimized U-Net is used for the segmentation. For the segmented images, the Binary Robust Independent Elementary Features (BRIEF) concept is adopted as the feature descriptor. These features are inputted to the Convolutional Neural Network (CNN) with Tuned Weight DNN (C-TWDNN) for the classification. In both segmentation and classification, the parameter tuning is employed by the combination of Galactic Swarm Optimization (GSO) and Deer Hunting Optimization Algorithm (DHOA) called the Self-adaptive-Galactic Deer Hunting Optimization (SA-GDHO). Experiments are conducted on a variety of public datasets, demonstrating that our method is capable of outperforming various expert systems and deep structured architectures.

ИССЛЕДОВАНИЕ МОДЕЛИ ДИССОЦИАЦИИ ГАЗОГИДРАТА В ПЛАСТЕ ПОД ДЕЙСТВИЕМ СВЕРХВЫСОКОЧАСТОТНОГО ЭЛЕКТРОМАГНИТНОГО ИЗЛУЧЕНИЯ

The article presents a numerical study of the gas hydrate dissociation model in a reservoir under the action of microwave electromagnetic radiation at 400 MHz, 1 000 MHz, and 2 450 MHz. The decompo-sition of gas hydrate under this influence is faster at lower values of the reservoir’s initial hydrate saturation. The effects of 1 000 MHz and 2 450 MHz frequencies are much stronger than those of 400 MHz. The study shows that during heating times higher than 400 hours, 1 000 MHz frequency radiation electromagnetic heating is more efficient than that of 2 450 MHz frequency. Using the proposed mathematical model, it is possible to determine the optimal frequencies of the radiation source at a given time of heating the reservoir of a particular field. Moreover, the resulting calculation of energy efficiency (EROI ≥ 10) of this method for gas hydrate-extracted gas proves its competitiveness when compared to traditional methods of thermal impact on the reservoir.

Drinking Mineral Water and Low-Intensity Electromagnetic Radiation Combinational Effect on Rat Testes in Metabolic Syndrome: а Randomized Controlled Study

INTRODUCTION. To correct disorders in the male reproductive system organs in the metabolic syndrome, it seems reasonable to use a combined effect of natural and artificial therapeutic physical factors – drinking mineral water and low-intensity electromagnetic interference of ultrahigh frequency – on an experimental model of this disease. These factors have antioxidant, cytoprotective and regenerative effects and can have a wide range of effects on various adaptation and protective regulatory mechanisms. AIM. To reveal the development of metabolic and structural adaptation-protective reactions in rat testes under the combined effect of drinking sulphate mineral water and low-intensity electromagnetic radiation microwave in experimental simulation of metabolic syndrome. MATERIAL AND METHODS. The experiments were performed on 26 nonlinear male rats weighing 180-200g. The metabolic syndrome model was reproduced for 60 days using a high-caloric diet. The rats were divided into 3 groups: 1st (experimental)-rats received drinking sulfate mineral water in combination with microwave electromagnetic radiation against the background of a high-calorie diet; 2nd (control) – rats received only a high-calorie diet; 3rd (intact) – rats without any influences. Research methods: biochemical, lightoptical, morphometric, electron microscopy. Significance of differences was assessed by Student's t-test. RESULTS AND DISCUSSION. It was found that the combinational effect of drinking sulfate mineral water and low-intensity electromagnetic radiation microwave contributed to the enhancement of a number of adaptive and protective reactions in the testes of rats against the background of a high-caloric diet. They were mainly manifested in the activation of antioxidant protection and protein synthesis, improvement of spermatogenic cells differentiation processes and increase in their number, enhancement of cellular and intracellular regeneration. CONCLUSION. The data obtained can be used in the development of new approaches to the methods of adaptation-protective and compensatory-restorative processes enhancement in the organs of the male reproductive system in metabolic syndrome.

Physical Differences between Man-Made and Cosmic Microwave Electromagnetic Radiation and Their Exposure Limits, and Radiofrequencies as Generators of Biotoxic Free Radicals

The critical arguments for radiofrequency radiation exposure limits are currently based on the principle that radio frequencies (RF) and electromagnetic fields (EMFs) are non-ionising, and their exposure limits are even 100-fold lower than those emitted from the Sun in the whole RF-EMF spectrum. Nonetheless, this argument has been challenged by numerous experimental and theoretical studies on the diverse biological effects of RF-EMF at much lower power density (W/m2) levels than today’s exposing limits. On the other hand, less attention has been given to counterarguments based on the differences in the physics concepts underlying man-made versus natural electromagnetic radiation (EMR) and on the fact that man’s biology has been adapted to the natural EMR levels reaching Earth’s surface at single EMF wavelengths, which are the natural limits of man’s exposure to EMFs. The article highlights the main points of interaction of natural and man-made radiation with biomatter and reveals the physical theoretical background that explains the effects of man-made microwave radiation on biological matter. Moreover, the article extends its analysis on experimental quantum effects, establishing the “ionising-like” effects of man-made microwave radiation on biological matter.

A method based on non-ionizing microwave radiation for ancillary diagnosis of osteoporosis: a pilot study

BackgroundOsteoporosis is a condition characterized by low bone mineral density, which typically leads to fractures and reduced quality of life. Currently, diagnostic devices used to assess this condition (e.g., dual-energy X-ray absorptiometry) are very costly, making it infeasible to meet the demand for testing in most countries. Therefore, we proposed a preclinical validation of a prototype called Osseus in an attempt to enhance osteoporosis screening tests and alleviate their costs. Osseus is a device developed to assist bone mineral density classification. It integrates a microcontroller into other peripheral devices to measure the attenuation at the middle phalanx of the middle finger, with two antennas operating at the 2.45 GHz frequency.ResultsWe conducted tests with plaster, poultry, and porcine bones. A comparison of the measurements of the original and mechanically altered samples demonstrated that the device can handle the complexity of the tissues within the bone structure and characterize its microarchitecture.ConclusionsOsseus is a device that has been preliminarily validated. Ionising radiation needed for DXA tests is replaced by non-ionising microwave electromagnetic radiation. Osseus enables early detection of osteoporosis, reduces costs, and optimizes high-complexity testing referrals. There is a lack of validation studies with the reference/gold standard that are currently under development.

Size-Dependent Microwave Heating and Catalytic Activity of Fine Iron Particles in the Deep Dehydrogenation of Hexadecane.

Knowledge of the electromagnetic microwave radiation–solid matter interaction and ensuing mechanisms at active catalytic sites will enable a deeper understanding of microwave-initiated chemical interactions and processes, and will lead to further optimization of this class of heterogeneous catalysis. Here, we study the fundamental mechanism of the interaction between microwave radiation and solid Fe catalysts and the deep dehydrogenation of a model hydrocarbon, hexadecane. We find that the size-dependent electronic transition of particulate Fe metal from a microwave “reflector” to a microwave “absorber” lies at the heart of efficient metal catalysis in these heterogeneous processes. In this regard, the optimal particle size of a Fe metal catalyst for highly effective microwave-initiated dehydrogenation reactions is approximately 80–120 nm, and the catalytic performance is strongly dependent on the ratio of the mean radius of Fe particles to the microwave skin depth (r/δ) at the operating frequency. Importantly, the particle size of selected Fe catalysts will ultimately affect the basic heating properties of the catalysts and decisively influence their catalytic performance under microwave initiation. In addition, we have found that when two or more materials—present as a mechanical mixture—are simultaneously exposed to microwave irradiation, each constituent material will respond to the microwaves independently. Thus, the interaction between the two materials has been found to have synergistic effects, subsequently contributing to heating and improving the overall catalytic performance.

Changes in Teak Germination and Seedling Growth Induced by Pre-Sowing Seed Treatment with Electromagnetic Field and Microwave Radiation

Aims: The effect of teak (Tectona grandis Linn. f) drupes treatment with electromagnetic field and microwave radiation on germination and seedling growth were studied.
 Study Design: Completely randomized block design.
 Place and Duration of Study: Division of Seed Science and Technology, Central Institute for Cotton Research, Coimbatore, Tamil Nadu and Seed Science and Technology laboratory, Anbil Dharmalingam Agricultural College and Research Institute, TNAU, Tiruchirappalli, Tamil Nadu.
 Methodology: Teak drupes have been exposed to the electromagnetic field of 750nt 5 hrs. per day for 15 days, 1500nt 5 hrs. per day for 15 days and 750 + 1500nt each 5 hrs. per day for 15 days and microwave radiation of 2450 MHz for 10, 20, 30, 40, 50 and 60 sec. The treated and control drupes were placed for germination in the sand filled earthen pots.
 Results: At 28 days after sowing the results revealed that electromagnetic treatment 1500nt 5 hrs. per day for 15 days recorded highest germination of 28.4 %, number of seedlings/100 drupes (32), minimum days required for initial emergence (13 days), root length of 8.3 cm, shoot length of 7.1 cm, dry matter production (49 mg) and vigour index (437). Microwave radiation of 2450 MHz for 30 sec recorded highest germination of 25.2 %, number of seedlings/100 drupes (30), minimum days required for initial emergence (12 days), root length of 8.5 cm, dry matter production (47 mg) and vigour index (373).
 Conclusion: It is concluded that, electromagnetic field and microwave radiation treatments may be considered as an alternative method to enhance germination of fresh teak drupes.

Metal nanoparticles as an electromagnetic microwave heat-cure agent for polydimethylsiloxane elastomers

Most commonly polydimethylsiloxane (PDMS) elastomer (silicone) is obtained from prepolymer liquid by cross-linking reaction (curing) at room temperature or assisted by external heating. However, in special cases, such as medical applications, it could be useful to cure the elastomeric material selectively and / or without external heat. An ability for customized curing can be controlled by selection of special type of fillers, such as metal particles or carbon nanotubes for curing routed via Joule heat, magnetic induction or electromagnetic microwave radiation. There are number of reasons for microwave curing to be preferred: microwave curing does not require heat conductivity of the surrounding medium, microwave energy can be directly delivered to select part of the material, this also allows for energy saving. Dielectric (internal) heating by microwave radiation is not efficient for pristine PDMS due to non-polar nature of this substance. Higher chemical polarity additives to PDMS could facilitate internal heating. We test silver nanoparticles (Ag NPs) for using as internal heating agent for PDMS elastomer kit (Sylgard 184). A set of general properties of the resultant PDMS / AgNPs composite material, including dynamic mechanical analysis (DMA), water wetting contact angle, adhesion to glass and optical spectroscopy of the filled PDMS are evaluated herein. The obtained composite materials exhibit a significantly higher work of adhesion, a lower viscoelastic modulus and slightly higher wettability. With time of microwave treatment and consequently cross-linking of the material those parameters head towards or approach those of the stock PDMS material.

Mathematical Model of the Rapeseed Drying Process with the Use of Electromagnetic Microwave Radiation Based on Heat Calculations

Few studies have been devoted to mathematical modelling of the drying process of various crops using microwave drying units. The paper presents a mathematical model of the rapeseed drying process using electromagnetic microwave radiation based on heat calculations. The research aims at mathematical modelling of thermal processes of rapeseed heating when treated by electromagnetic microwave radiation. The computational and technological scheme of drying has been developed. According to the scheme, the drying process includes several cycles, which, in turn, consist of two stages. In the first stage, rapeseeds are heated to the desired temperature by applying electromagnetic microwave radiation. At this stage, there is an intensive release of moisture from rapeseeds, accumulating in the interseminal space. In the second stage, rapeseeds are blown off with atmospheric air to create a fluidized bed. The developed mathematical model allows predicting such parameters as the power of the microwave generator and fan depending on the drying unit capacity.