Our knowledge of electromagnetic heating’s effect on heavy oil upgrading is largely based very limited data. The aim the present research was thus to study in detail microwave exposure absence and presence nanosized magnetite composition oil. obtained data reveal that use improves not only radiation application as a result its absorption release thermal energy but also these nanoparticles have catalytic ability break carbon–heteroatom bonds resins asphaltene molecules. In fact, overall...

We report on the numerical simulations and experimental validation of a microwave planar sensor based two coupled rings operating in 4–6 GHz range. The fabricated is used to characterize dielectric permittivity vegetable oils. optimized geometrical parameters order improve overlap between oil samples under study electric field. results showed an excellent match with simulation results. allowed retrieve sensitivity about 35 MHz per unit frequency range interest. This paves way realization...

Nowadays, the classical aperture theory is supplemented by data on properties of electromagnetic fields in near radiated field zone. A fundamental feature functioning antennas this area possibility spatial focusing energy. In case, it possible to realize maximum strength at a given point space and reduce outside point. The effect itself provided in-phase addition from elementary sources. Also, formation point, also minimum implementing antiphase partial forming sum difference amplitude...

Fiber Bragg gratings are sensitive elements in fiber optic sensor networks, and this paper discusses the practicalities of using neural network algorithms to determine their central wavelengths. The problem is wavelength a single sensor, parameters which obtained low-resolution spectrum analyzer. configuration algorithm for producing training control datasets specified. results selected demonstrated that proposed method could position with resolution two half orders magnitude higher than...

Abstract This paper addresses the issue of constructing millimeter band antennas using dielectric waveguide structures. A new type linear antenna, incorporating metal pins on side walls grooved waveguide, is proposed for generating polarization perpendicular to axis. However, these suffer from drawback cross-polarized radiation in directions close To overcome this limitation, a modified antenna design with transverse introduced, featuring closed groove longitudinal slot at top wall. The...

The Bragg microwave structures on the coaxial waveguide, constructed basis of transfer optical technologies similar to fiber grating, are considered. It is offered use versions such in sensor application, particular, creation strain gauges, instruments for measuring dielectric constant liquids and liquid products' level Methods description periodic inhomogeneous characteristics ways modify form frequency dependence scattering parameters viewed.

In this article questions related to the development instantaneous radio frequency measurement system based on application in them original ways of amplitude-phase modulation transformation single-frequency optical carrier by a signal symmetric two-frequency and measuring “frequency-amplitude” fiber Bragg grating with special profile are considered. Such systems have broad prospects for use telecommunications, military environmental monitoring.

In this paper we consider the issues of multi-sensor system design for measuring temperature and humidity during organic livestock waste (OLW) microwave treatment. The "brains" OLW treatment are concentrated in mathematical model. Changes dielectric properties medium being processed taken into account function heat losses, which depend on spatial variable time. Temperature moment input data content is a key determinant quality output product (fuel briquettes), therefore, controlling can...

Broadband and ultra-wideband signals are increasingly used in modern radio systems. Traditional performance of evaluation antennas operating with narrowband not always adequately reflect the characteristics broadband antennas, at least view frequency dependence antenna pattern. Accounting for becomes important low-frequency range spectrum. Systems using these types may include control atmosphere measuring its frequency-selective properties meter decameter wavelengths. Possibility spatial...

Abstract The main characteristic of the converter element in resonant microwave sensors that determines sensitivity conversion is quality factor resonance line. In structures with periodic inhomogeneity classical topology, circuit at high values signal-to-noise ratio may turn out to be low, which entails emergence restrictions on maximum achievable parameters. One ways increase both Q and modification other properties structure affect overall efficiency use quasiperiodic elements. coaxial...

The technology of fiber Bragg gratings is used as one the most applicable technologies for construction optic sensors and telecommunication systems. Periodic irregular wave resistance located in guiding waveguide can be regarded analog grating structure field radio-frequency. Coaxial a guide system, so special case this on coaxial cable. Recently, were beginning to with heterogeneity discrete phase π-shift. Based properties analysis reflection characteristics structures shift optical...

The article describes the effect of short-term exposure to an electromagnetic field (EMF) microwave radiation at a frequency 2.45 GHz on rate development embryo in egg agricultural bird. To carry out experiments, laboratory setup was developed for controlled and impact object being processed. dielectric characteristics protein yolk fertilized non-fertilized poultry eggs were measured analyzed, basis which computer modeling chamber pre-incubation processing unit carried out. influence...

Abstract This paper presents a new periodic grooved dielectric leaky-wave antenna with non-identical irregularities for an extremely high-frequency range capable of performing efficiently in the Ka band through stable gain, decrease level side lobes, and achievement narrower main lobe beam. It consists waveguide placed inside channelled rectangular metallic to improve performance. A rod was used overcome losses related propagation electromagnetic waves metal conductors. 21-element linear...

В данной статье обсуждаются вопросы контроля параметров процесса микроволновой переработки куриного помета в топливные брикеты. Необходимость описанного технологического комплекса объясняется остростоящей проблемой охраны окружающей среды, связанной с отходами животноводческих комплексов. Важнейшей задачей является быстрая утилизация и переработка образующихся навозосодержащих отходов. За счет своих преимуществ перед традиционным нагревом, применение микроволнового нагрева установке...

A new approach to teaching technical disciplines in training of Radio Engineers is proposed. The based on the method non-linear note-taking using mind maps. This allows students analyze and process studied material quickly with high quality by engaging both left right hemispheres brain work. effectiveness this shown its strengths weaknesses are considered.

The implementation of non-absorbent polymers thermal destruction initiated by indirect heating in an intense electromagnetic microwave field using carbon conversion elements is considered. Results theoretical analysis based on mathematical modeling and experimental investigation into depolymerization the polymer are analyzed. Polystyrene polymethylmethacrylate investigated polymers; their products styrene methyl methacrylate.

This paper is devoted to mathematical modelling of technology for organic livestock waste (OLW), example, from poultry and horse breeding, microwave treatment. A significant improvement in the quality OLW treatment, a decrease energy costs reduction duration required thermal effect can be achieved by using environmentally friendly electromagnetic field. The designing, improving optimizing heating devices are significantly reduced building research models processes occurring electrodynamics...