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Relevant bibliographies by topics / Modelling of microwave systems

Academic literature on the topic 'Modelling of microwave systems'

Author: Grafiati

Published: 9 March 2023

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Journal articles on the topic "Modelling of microwave systems"

1

Pittella, Erika, Emanuele Piuzzi, Pietro Russo, and Francesco Fabbrocino. "Microwave Characterization and Modelling of PA6/GNPs Composites." Mathematical and Computational Applications 27, no. 3 (May 11, 2022): 41. http://dx.doi.org/10.3390/mca27030041.

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The interest in composite materials has increased in the last decades since they have the advantages of combining intrinsic properties of each component and offer better performance with respect to the base constituents. In particular, these kinds of materials can have different electrical characteristics by varying the filling percentage and, therefore, they can be used in diverse applications. Thus, a detailed study of the microwave response of these composite systems is of great practical importance. In fact, the dielectric constant and loss tangent are key factors in the design of microwave components. In this frame, the outstanding properties of graphene-like fillers may be exploited to develop new very interesting materials to study and characterize. In this paper, microwave characterization of compounds, based on nylon 6 containing different percentages of graphene nanoplatelets, is carried out taking the neat matrix sample processed under the same conditions as benchmark. The measurements were carried out using two microwave systems, operating at two different frequency bands, appropriate to characterize solid and compact material samples. The achieved results, in line with limited data from the literature and from material data sheets, highlight the possibility to use the present polymers as an excellent electromagnetic interference shielding, as confirmed by full wave electromagnetic numerical simulations that were conducted with a numerical electromagnetic software.

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Ostaszewska-Liżewska, Anna, Dominika Kopala, Jakub Szałatkiewicz, Roman Szewczyk, and Peter Råback. "The Influence of Mesh Granularity on the Accuracy of FEM Modelling of the Resonant State in a Microwave Chamber." Applied Sciences 11, no. 17 (August 27, 2021): 7932. http://dx.doi.org/10.3390/app11177932.

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Microwave technology is widely used in different areas of advanced industry when energy must be provided to water-containing and other materials. The main barrier in the development of microwave devices is the possibility of efficient design by modelling a microwave system in a resonant state. For technical systems, the finite element method is widely used. However, the convergence process in the microwave finite element solver is sophisticated. The process itself and the influence of mesh granularity on the accuracy of modelling of microwave chambers in resonant states have not been investigated previously. The present paper aims to fill this gap. The resonance conditions of a microwave chamber were tested from the point of view of spatial resolution of the tetrahedral mesh used for open-source ELMER FEM software. The presented results experimentally determine the limits of accuracy of the geometry of microwave resonant chamber finite element method-based models. The determined values of microwave resonant chamber dimension tolerances should be considered for both open-source and commercial software for microwave modelling.

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Gal, B., and K. Granat. "Electrical Properties of Multilayer Systems Composed of Foundry Tooling and Moulding Sand." Archives of Foundry Engineering 17, no. 2 (June 27, 2017): 21–24. http://dx.doi.org/10.1515/afe-2017-0044.

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Abstract Within the research, selected multilayer technological systems created as combinations of water-glass containing moulding sand with foundry tooling, were characterised on the grounds of their electrical properties. By measuring resonance frequency and quality factor of a waveguide resonance cavity, real component of permittivity εr’ and loss tangent tgδ were determined for multilayer foundry systems with various qualitative and quantitative compositions. It was demonstrated that combination of a sandmix and foundry tooling with known dielectric properties results in a system with different physico-chemical properties, whose relation to the parameters of individual components of the system is undefined at this research stage. On the grounds of measurement results, theoretical value of microwave heating power, dissipated in unit volume of the selected multilayer foundry system, was determined. Knowledge of theoretical heating power and evaluation of physical, chemical and structural changes occurring in moulding sands exposed to microwaves in such a technological system makes a ground for empirical modelling of the process of microwave heating of foundry moulds and cores.

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Ermolova, Natalia, and Pertti Vainikainen. "On modelling nonlinear microwave power amplifiers in multi-carrier transmission systems." European Transactions on Telecommunications 15, no. 1 (January 2004): 1–6. http://dx.doi.org/10.1002/ett.940.

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Salgado, H. M., and J. J. O'Reilly. "Experimental validation of Volterra series nonlinear modelling for microwave subcarrier optical systems." IEE Proceedings - Optoelectronics 143, no. 4 (August 1, 1996): 209–13. http://dx.doi.org/10.1049/ip-opt:19960081.

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Manivannan, N., W. Balachandran, R. Beleca, and M. Abbod. "Microwave Plasma System Design and Modelling for Marine Diesel Exhaust Gas Abatement of NOx and SOx." International Journal of Environmental Science and Development 6, no. 2 (2015): 151–54. http://dx.doi.org/10.7763/ijesd.2015.v6.579.

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Donelli, M., I. Craddock, D. Gibbins, and M. Sarafianou. "Modelling complex electromagnetic sources for microwave imaging systems with wave field synthesis technique." Electronics Letters 48, no. 23 (2012): 1478. http://dx.doi.org/10.1049/el.2012.2627.

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Shabunin, Sergey, Sergey Plokhov, Ilia Bukrin, and Victor Chechetkin. "Microwave phased array for aerological radar." ITM Web of Conferences 30 (2019): 05022. http://dx.doi.org/10.1051/itmconf/20193005022.

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The use of radars with phased antenna arrays in aerological atmospheric sounding systems significantly increases the technical characteristics of the radio channel, ensures reliable auto-tracking in the near zone at high angular velocities of the aerological probe, and reduces the overall dimensions of the radar station. Modelling and optimization of the parameters of the phased array and phase shifters were carried out in the NI AWR Design Environment. The results of the study showed that when designing a radar station, it is possible to reduce the level of side lobes of the phased array antenna pattern and the effect of reflections from the underlying surface under operating conditions significantly.

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Hirahara, Yoichi, Patricia de Rosnay, and Gabriele Arduini. "Evaluation of a Microwave Emissivity Module for Snow Covered Area with CMEM in the ECMWF Integrated Forecasting System." Remote Sensing 12, no. 18 (September 11, 2020): 2946. http://dx.doi.org/10.3390/rs12182946.

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The Community Microwave Emission Modelling platform (CMEM) has been developed by the European Centre for Medium-Range Weather Forecasts (ECMWF) as the forward operator radiative transfer model for low frequency passive microwave brightness temperatures (TB). It is used at ECMWF for L-band TB monitoring over snow free areas. In this paper, upgrades to CMEM are presented in order to explore forward modelling in snow-covered areas for coupled land-atmosphere numerical weather prediction systems. The upgrades enable to use CMEM on an extended range of frequencies and the Helsinki University of Technology multi-layer snow emission model is implemented. Offline CMEM experiments are evaluated against AMSR2 (Advanced Microwave Scanning Radiometer 2) observations showing that simulated TB is improved when using a multi-layer snow scheme, compared to a single-layer scheme. The improvements mainly result from a better representation of snow characteristics in the multi-layer snowpack model. CMEM is also evaluated in the Integrated Forecasting System and coupled to RTTOV (Radiative Transfer for TOVS). The numerical results show improved simulated TB at low frequency V polarization over snow-covered area compared to a configuration using emissivity atlas. Degradations at frequencies higher than 20 GHz indicate that further improvements are required in the emissivity and snowpack properties modelling.

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Ambrosanio, M., R. Scapaticci, and L. Crocco. "A Simple Quantitative Inversion Approach for Microwave Imaging in Embedded Systems." International Journal of Antennas and Propagation 2015 (2015): 1–18. http://dx.doi.org/10.1155/2015/129823.

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In many applications of microwave imaging, there is the need of confining the device in order to shield it from environmental noise as well as to host the targets and the medium used for impedance matching purposes. For instance, in MWI for biomedical diagnostics a coupling medium is typically adopted to improve the penetration of the probing wave into the tissues. From the point of view of quantitative imaging procedures, that is aimed at retrieving the values of the complex permittivity in the domain under test, the presence of a confining structure entails an increase of complexity of the underlying modelling. This entails a further difficulty in achieving real-time imaging results, which are obviously of interest in practice. To address this challenge, we propose the application of a recently proposed inversion method that, making use of a suitable preprocessing of the data and a scenario-oriented field approximation, allows obtaining quantitative imaging results by means of quasi-real-time linear inversion, in a range of cases which is much broader than usual linearized approximations. The assessment of the method is carried out in the scalar 2D configuration and taking into account enclosures of different shapes and, to show the method’s flexibility different shapes, embedding nonweak targets.

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Dissertations / Theses on the topic "Modelling of microwave systems"

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Ehlers, Richard Alfred. "Modelling of packaging systems in microwave fields." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621389.

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REALINI, SABRINA. "ANALYSIS OF THE STRIP OPTICAL SYSTEM FOR CMB POLARIZATION MEASUREMENTS." Doctoral thesis, Università degli Studi di Milano, 2020. http://hdl.handle.net/2434/783084.

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Nowadays, the detection of B-mode polarization anisotropies on large angular scales in the Cosmic Microwave Background polarization pattern is one of the major challenges in observational cosmology. In fact, it would give us an evidence in favor of the inflationary paradigm, shedding light on the physics of the very early Universe. Unfortunately, the amplitude of the signal is extremely low, at fractions of µK, and its detection requires high sensitivity instruments with thousands of detectors, a rigorous control of systematic effects, and a precise knowledge of the foreground polarized emission of our Galaxy. The Large Scale Polarization Explorer is one of the upcoming experiments devoted to the observation of the CMB polarization on large angular scales. It is based on two independent instruments: the STRIP ground-based telescope and the SWIPE balloon-borne mission. This thesis has been carried out in the context of the development of the STRIP instrument, a coherent polarimeter array that will observe the microwave sky from the Teide Observatory in Tenerife in two frequency bands centred at 43 and 95 GHz through a dual-reflector crossed-Dragone telescope of 1.5 m aperture. We present the implementation of the realistic electromagnetic model of the STRIP telescope, which includes all its optical elements and the surrounding structures. Since accurate predictions and measurements of the beam shape are essential both during the instrument design phase and for an in-depth knowledge of the whole-instrument response, we performed detailed optical simulations of the beam radiation properties. The results have been essential to assess the impact of the optical response on CMB polarization measurements when observing the sky with the nominal scanning strategy. This activity was mandatory because the optics is one of the major limiting factors for high precision measurements.

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Salah, Adham M. S. "Investigation of Integrated Decoupling Methods for MIMO Antenna Systems. Design, Modelling and Implementation of MIMO Antenna Systems for Different Spectrum Applications with High Port-to-Port Isolation Using Different Decoupling Techniques." Thesis, University of Bradford, 2019. http://hdl.handle.net/10454/18427.

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Multiple-Input-Multiple-Output (MIMO) antenna technology refers to an antenna with multiple radiators at both transmitter and receiver ends. It is designed to increase the data rate in wireless communication systems by achieving multiple channels occupying the same bandwidth in a multipath environment. The main drawback associated with this technology is the coupling between the radiating elements. A MIMO antenna system merely acts as an antenna array if the coupling between the radiating elements is high. For this reason, strong decoupling between the radiating elements should be achieved, in order to utilize the benefits of MIMO technology. The main objectives of this thesis are to investigate and implement several printed MIMO antenna geometries with integrated decoupling approaches for WLAN, WiMAX, and 5G applications. The characteristics of MIMO antenna performance have been reported in terms of scattering parameters, envelope correlation coefficient (ECC), total active reflection coefficient (TARC), channel capacity loss (CCL), diversity gain (DG), antenna efficiency, antenna peak gain and antenna radiation patterns. Three new 2×2 MIMO array antennas are proposed, covering dual and multiple spectrum bandwidths for WLAN (2.4/5.2/5.8 GHz) and WiMAX (3.5 GHz) applications. These designs employ a combination of DGS and neutralization line methods to reduce the coupling caused by the surface current in the ground plane and between the radiating antenna elements. The minimum achieved isolation between the MIMO antennas is found to be better than 15 dB and in some bands exceeds 30 dB. The matching impedance is improved and the correlation coefficient values achieved for all three antennas are very low. In addition, the diversity gains over all spectrum bands are very close to the ideal value (DG = 10 dB). The forth proposed MIMO antenna is a compact dual-band MIMO antenna operating at WLAN bands (2.4/5.2/5.8 GHz). The antenna structure consists of two concentric double square rings radiating elements printed symmetrically. A new method is applied which combines the defected ground structure (DGS) decoupling method with five parasitic elements to reduce the coupling between the radiating antennas in the two required bands. A metamaterial-based isolation enhancement structure is investigated in the fifth proposed MIMO antenna design. This MIMO antenna consists of two dual-band arc-shaped radiating elements working in WLAN and Sub-6 GHz 5th generation (5G) bands. The antenna placement and orientation decoupling method is applied to improve the isolation in the second band while four split-ring resonators (SRRs) are added between the radiating elements to enhance the isolation in the first band. All the designs presented in this thesis have been fabricated and measured, with the simulated and measured results agreeing well in most cases.
Higher Committee for Education Development in Iraq (HCED)

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Palierakis, Y. "Non-intrusive flow measurement of pneumatically conveyed solids; physical modelling and application of spatial windowing to improve microwave and electrostatic sensors : Conveyed solids velocity measurement systems based on transit time correlation and th." Thesis, University of Bradford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371496.

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Three sensor systems measuring particle velocity in gas-solids flows have been studied. These are the microwave Doppler flow sensor, the electrostatic sensor, and the microwave sensor for correlation measurement, all utilizing different principles of operation. The Doppler sensor is based on the Doppler frequency shift observed when microwaves are backscattered by moving targets. An analysis of the process of Doppler signal generation and a computer model based on this analysis have been presented. A novel feature of this work is the implementation of partial screening of the flow field which improves the shape of the Doppler spectrum and results in a mean Doppler frequency proportional to the flow velocity and independent of the flow profile. The electrostatic sensor is based on the principle of monitoring the charge induced on metallic surfaces by charged particles moving in their neighbourhood. A theoretical analysis of the spatial performance of the sensor along with a computer model and experimental verification are presented. Principally, ring type of sensors have been examined and the streched band electrostatic sensor is introduced (SBES). The advantage gained with the introduction of the stretched band electrostatic sensor is a uniform sensitivity across the plane of the sensor. The microwave correlation sensor follows the principles of previous ultrasonic and laser correlation flovrneters. That is, "a transmitted beam penetrates the flow field, suffers modulation, and is detected by receivers placed on the other side of the flow field. An analysis of the principles has been presented and a simplified computer model has been used for system design studies. The study presented here shows that a microwave correlation sensor is viable device for measuring solids velocity. Wherever possible direct comparisons of the properties and the performance of the three sensors are made in order to draw conclusions as to which sensor is best for a specific industrial application. Engineering, environmental and safety problems which might be encountered in the practical implementation of the sensors are discussed. In addition, areas of uncertainty where further work is required are summarized.

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Aboualmal, Abdulhadi M. A. "Analysis and modelling of the impact of anomalous propagation on terrestrial microwave links in a subtropical region, based on long-term measurements : statistical analysis of long-term meteorological and signal strength measurements in a subtropical region and investigation of the impact of anomalous refractivity profiles on radio propagation in terrestrial microwave wireless systems." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14804.

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Prevailing propagation phenomena in certain areas play a vital role in deciding terrestrial wireless systems performance. Vertical refractivity profile below 1 km is a critical parameter for designing reliable systems; noting that there is a shortage of upper-air data worldwide. Anomalous phenomena may cause severe signal fading and interference beyond the horizon. The objectives of this thesis are to investigate dominant refractive conditions in the subtropical Arabian Gulf region, develop new approaches and empirical models for evaluating vertical refractivity profiles and relevant propagation parameters in the low troposphere, and to examine the impact of frequently experienced anomalous phenomena on terrestrial microwave links. Twenty-three years of meteorological measurements, from 1990 to 2013, are utilized using spatially separated surface stations and a single radiosonde in the United Arab Emirates (UAE). Profiles of sea level, surface and upper refractivity components are statistically analysed. Three major atmospheric layers; namely 65 m, 100 m and 1 km above the ground are studied to analyse relevant propagation parameters such as sub-refraction, super-refraction, anomalous propagation probability parameter β0 and point refractivity gradient not exceeded for 1% of time. The effective earth radius factor k is investigated using a new weighted averaged approach. In addition, the seasonal structure of atmospheric ducting is dimensioned within 350 m layer above ground. Finally, microwave measurement campaign is conducted using multiple radio links operating in UAE using various frequency bands. The link budget simulations are compared with the signal strength measurements. Fading scenarios are studied against the observed anomalous conditions and several recommendations are concluded.

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Lundgren, Nils. "Modelling microwave measurements in wood /." Luleå, 2005. http://epubl.luth.se/1402-1757/2005/61.

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Vegh, Viktor. "Numerical modelling of industrial microwave heating." Thesis, Queensland University of Technology, 2003. https://eprints.qut.edu.au/37144/7/37144_Digitised%20Thesis.pdf.

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The numerical modelling of electromagnetic waves has been the focus of many research areas in the past. Some specific applications of electromagnetic wave scattering are in the fields of Microwave Heating and Radar Communication Systems. The equations that govern the fundamental behaviour of electromagnetic wave propagation in waveguides and cavities are the Maxwell's equations. In the literature, a number of methods have been employed to solve these equations. Of these methods, the classical Finite-Difference Time-Domain scheme, which uses a staggered time and space discretisation, is the most well known and widely used. However, it is complicated to implement this method on an irregular computational domain using an unstructured mesh. In this work, a coupled method is introduced for the solution of Maxwell's equations. It is proposed that the free-space component of the solution is computed in the time domain, whilst the load is resolved using the frequency dependent electric field Helmholtz equation. This methodology results in a timefrequency domain hybrid scheme. For the Helmholtz equation, boundary conditions are generated from the time dependent free-space solutions. The boundary information is mapped into the frequency domain using the Discrete Fourier Transform. The solution for the electric field components is obtained by solving a sparse-complex system of linear equations. The hybrid method has been tested for both waveguide and cavity configurations. Numerical tests performed on waveguides and cavities for inhomogeneous lossy materials highlight the accuracy and computational efficiency of the newly proposed hybrid computational electromagnetic strategy.

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Dibben, David. "Numerical and experimental modelling of microwave applicators." Thesis, University of Cambridge, 1995. https://www.repository.cam.ac.uk/handle/1810/237037.

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This thesis presents a time domain finite element method for the solution of microwave heating problems. This is the first time that this particular technique has been applied to microwave heating. It is found that the standard frequency domain finite element method is unsuitable for analysing multimode applicators containing food-like materials due to a severe ill-conditioning of the matrix equations. The field distribution in multimode applicators loaded with low loss materials is found to be very sensitive to small frequency changes. Several solutions at different frequencies are therefore required to characterise the behaviour of the loaded applicator. The time domain finite element method is capable of producing multiple solutions at different frequencies when used with Gaussian pulse excitation; it is therefore ideally suited to the analysis of multimode applicators. A brief survey of the methods available for the solution of the linear equations is provided. The performance of these techniques with both the frequency domain and time domain finite element methods is then studied. Single mode applicators are also analysed and it is found that the frequency domain method is superior in these cases. Comparisons are given between the calculated results and experimental data for both single mode and multimode systems. The importance of experimental verification being stressed. The choice of element type is an important consideration for the finite element method. Three basic types of element are considered; nodal, Whitney edge elements and linear edge elements. Comparisons of the errors with these elements show that Whitney elements produce a consistently lower error when post-processing is used to smooth the solution. The coupled thermal-electromagnetic problem is investigated with many difficulties being identified for the application to multimode cavity problems.

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Schoeman, Marlize. "Interpolation-based modelling of microwave ring resonators." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/1192.

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Sum, Kam Chung. "Combined microwave optoelectronic modelling for semiconductor lasers." Thesis, University of Kent, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337319.

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Books on the topic "Modelling of microwave systems"

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Ferroelectrics in microwave devices, circuits and systems: Physics, modelling, fabrication and measurements. London: Springer, 2009.

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Norton, Mark E. Nonlinear modelling of GaAs HBTs applied to spectral regrowth analysis of power amplifiers. Dublin: University College Dublin, 1997.

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European Microwave Conference (21st 1991 Stuttgart, Germany). Workshop proceedings: Microwave optoelectronics; advanced car electronics and future traffic control systems related to microwaves, CAD and modelling of microwave devices and circuits : International Congress Centre, Stuttgart, Germany. [Tunbridge Wells]: Microwave Exhibitions and Publishers, 1991.

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Awang, Zaiki. Microwave Systems Design. Singapore: Springer Singapore, 2014. http://dx.doi.org/10.1007/978-981-4451-24-6.

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Cook, Nigel P. Microwave principles and systems. Englewood Cliffs, N.J: Prentice-Hall, 1986.

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Feher, Lambert E. Energy Efficient Microwave Systems. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-92122-6.

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Microwave components and systems. Wokingham, England: Addison-Wesley, 1987.

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Awrejcewicz, Jan, ed. Dynamical Systems: Modelling. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42402-6.

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Boots, Barry, Atsuyuki Okabe, and Richard Thomas, eds. Modelling Geographical Systems. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-2296-4.

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Moller, Faron, and Georg Struth. Modelling Computing Systems. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-84800-322-4.

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Book chapters on the topic "Modelling of microwave systems"

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Shen, Ming, Jan Hvolgaard Mikkelsen, and Torben Larsen. "Modelling of Substrate Noise and Mitigation Schemes for UWB Systems." In Microwave and Millimeter Wave Circuits and Systems, 173–206. Chichester, UK: John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118405864.ch7.

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Kurien, Caneon, Ajay Kumar Srivastava, Karan Anand, and Niranajan Gandigudi. "Modelling of Microwave-Based Regeneration in Composite Regeneration Emission Control System." In Advances in Intelligent Systems and Computing, 313–20. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8618-3_33.

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Skwirzynski, Jozef K. "Signature Creation in Pattern Recognition for Infra-Red and Possibly for Microwave Systems." In Electromagnetic Modelling and Measurements for Analysis and Synthesis Problems, 427–47. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3232-9_17.

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Adesoye, Adegoke, Okpeki Ufuoma, and Green Oluwole. "Modelling of Propagation Loss for Single Trees Using Simulated Coppice at Microwave Frequencies." In 12th International Conference on Information Systems and Advanced Technologies “ICISAT 2022”, 1–7. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-25344-7_1.

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Bezoušek, P. "Modelling of Active Semiconductor Circuit Elements." In Microwave Integrated Circuits, 136–72. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1224-6_3.

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Stangle, Gregory C. "Example: Microwave heating of ceramics." In Modelling of Materials Processing, 662–88. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5813-2_19.

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Wake, D., P. Lane, M. Joindot, J. F. Cadiou, P. Jaffré, E. Pénard, G. Kalbe, et al. "Microwave-Photonics Systems." In Microwave Photonics, 209–373. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-0-387-30651-3_5.

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Freude, Wolfgang, Guy-Aymar Chakam, Jan-Michael Brosi, and Christian Koos. "Microwave Modelling of Photonic Crystals." In Photonic Crystals, 198–214. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527602593.ch10.

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Delagebeaudeuf, D., and P. Briere. "MESFET operation principles and device modelling." In The Microwave Engineering Handbook, 303–22. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-4552-5_14.

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Brookbanks, D. Michael. "Application of Modelling to Microwave CAD." In Compound Semiconductor Device Modelling, 246–69. London: Springer London, 1993. http://dx.doi.org/10.1007/978-1-4471-2048-3_13.

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Conference papers on the topic "Modelling of microwave systems"

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Yaschuk, A. S., and B. N. Shelkovnikov. "The Modelling Software of the Microwave Wireless Communication Systems." In 2007 17th International Crimean Conference - Microwave & Telecommunication Technology. IEEE, 2007. http://dx.doi.org/10.1109/crmico.2007.4368742.

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Gomes, N. J. "Semiconductor laser modelling for microwave/millimetre-wave applications." In IEE Colloquium on Fibre Optics in Microwave Systems and Radio Access. IEE, 1997. http://dx.doi.org/10.1049/ic:19970717.

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Aseeri, Mohammed A., Muhammad R. Ahmed, Ahmed Al Ghamdi, and Majharul Talukder. "Modelling a microwave chaotic generator for RADAR and communication systems." In 2015 IEEE 8th GCC Conference and Exhibition (GCCCE). IEEE, 2015. http://dx.doi.org/10.1109/ieeegcc.2015.7060059.

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Brzeska, M., and G. A. Chakam. "Modelling of the coverage range for modern vehicle access systems at low frequencies." In 2007 European Microwave Conference. IEEE, 2007. http://dx.doi.org/10.1109/eumc.2007.4405306.

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Sobhy, Mohamed I., EI-Sayed A. Bakkar, Ming W. R. Ng, Essam A. Hosny, Bertram Isele, and Peter Russer. "Modelling of microwave circuits by system identification methods." In 25th European Microwave Conference, 1995. IEEE, 1995. http://dx.doi.org/10.1109/euma.1995.337149.

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Li, Yingguang, Jing Zhou, and Di Li. "A new concept to improve microwave heating uniformity through data-driven process modelling." In Ampere 2019. Valencia: Universitat Politècnica de València, 2019. http://dx.doi.org/10.4995/ampere2019.2019.9753.

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For a long time, the heating pattern of the workpiece within a multimode microwave oven was considered to be highly sophisticated. As a consequence, the uneven microwave heating problem can only be partly alleviated by a random movement between the electromagnetic field and the workpiece. In this paper, we reported that the heating pattern has a specific correspondence with microwave system settings. The influence factor of the heating pattern and the corresponding mechanism were systematically studied by both theoretical analysis and experimental investigations. On this basis, a data-driven process model was established to learn the material’s dynamic temperature behaviors under different microwave system settings, and a new concept to improve the microwave heating uniformity by temperature monitoring and active compensation was proposed. The effectiveness of the method was demonstrated by a polymer composite microwave processing case study.

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Rundstedt, Karl, Lei Bao, Rajet Krishnan, Bengt-Erik Olsson, and Thomas Eriksson. "On Field Measurements and Modelling of 2x2 Microwave LOS-MIMO Systems." In GLOBECOM 2015 - 2015 IEEE Global Communications Conference. IEEE, 2014. http://dx.doi.org/10.1109/glocom.2014.7417256.

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Rundstedt, Karl, Lei Bao, Rajet Krishnan, Bengt-Erik Olsson, and Thomas Eriksson. "On Field Measurements and Modelling of 2x2 Microwave LOS-MIMO Systems." In GLOBECOM 2015 - 2015 IEEE Global Communications Conference. IEEE, 2015. http://dx.doi.org/10.1109/glocom.2015.7417256.

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Sobhy, M. I., E. A. Hosny, and M. W. R. Ng. "Modelling and analysis of non-linear and dispersive microwave systems in the time domain." In 23rd European Microwave Conference, 1993. IEEE, 1993. http://dx.doi.org/10.1109/euma.1993.336846.

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Caramazza, Laura, Annalisa De Angelis, Franck M. Andre, Lluis M. Mir, Francesca Apollonio, and Micaela Liberti. "Dielectric Response of Biological Systems at Cellular and Subcellular Level: A Modelling Study." In 2022 52nd European Microwave Conference (EuMC). IEEE, 2022. http://dx.doi.org/10.23919/eumc54642.2022.9924496.

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Reports on the topic "Modelling of microwave systems"

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Nechaev, V., Володимир Миколайович Соловйов, and A. Nagibas. Complex economic systems structural organization modelling. Politecnico di Torino, 2006. http://dx.doi.org/10.31812/0564/1118.

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One of the well-known results of the theory of management is the fact, that multi-stage hierarchical organization of management is unstable. Hence, the ideas expressed in a number of works by Don Tapscott on advantages of network organization of businesses over vertically integrated ones is clear. While studying the basic tendencies of business organization in the conditions of globalization, computerization and internetization of the society and the results of the ﬁnancial activities of the well-known companies, the authors arrive at the conclusion, that such companies, as IBM, Boeing, Mercedes-Benz and some others companies have not been engaged in their traditional business for a long time. Their partner networks performs this function instead of them. The companies themselves perform the function of system integrators. The Tapscott’s idea ﬁnds its conﬁrmation within the framework of a new powerful direction of the development of the modern interdisciplinary science – the theory of the complex networks (CN) [2]. CN-s are multifractal objects, the loss of multifractality being the indicator of the system transition from more complex state into more simple state. We tested the multifractal properties of the data using the wavelet transform modulus maxima approach in order to analyze scaling properties of our company. Comparative analysis of the singularity spectrumf(®), namely, the diﬀerence between maximum and minimum values of ® (∆ = ®max ¡ ®min) shows that IBM company is considerably more fractal in comparison with Apple Computer. Really, for it the value of ∆ is equal to 0.3, while for the vertically integrated company Apple it only makes 0.06 – 5 times less. The comparison of other companies shows that this dependence is of general character. Taking into consideration the fact that network organization of business has become dominant in the last 5-10 years, we carried out research for the selected companies in the earliest possible period of time which was determined by the availability of data in the Internet, or by historically later beginning of stock trade of computer companies. A singularity spectrum of the ﬁrst group of companies turned out to be considerably narrower, or shifted toward the smaller values of ® in the pre-network period. The latter means that dynamic series were antipersistant. That is, these companies‘ management was rigidly controlled while the impact of market mechanisms was minimized. In the second group of companies if even the situation did changed it did not change for the better. In addition, we discuss applications to the construction of portfolios of stock that have a stable ratio of risk to return.

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Batty, W., A. J. Panks, R. G. Johnson, and C. M. Snowden. Electro-Thermal Modelling of Monolithic and Hybrid Microwave and Millimeter Wave IC's. Fort Belvoir, VA: Defense Technical Information Center, March 2001. http://dx.doi.org/10.21236/ada394388.

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Khatry, R., and A. Thompson. A sensor modelling framework for autonomous systems. National Physical Laboratory, July 2021. http://dx.doi.org/10.47120/npl.ms29.

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Strawser, Richard E. Microelectromagnetic Systems (MEMS) Electrostatic Switching Technology for Microwave Systems. Fort Belvoir, VA: Defense Technical Information Center, December 2000. http://dx.doi.org/10.21236/ada388290.

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Lahey, R. T. Jr, and D. A. Drew. The continuum modelling of two-phase flow systems. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/5922566.

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Brodsky, Jason P., Dominique H. Porcincula, Elaine Lee, Andrew N. Mabe, and Xianyi Zhang. Mixed Material Scintillator Systems Particle ID Modelling Report. Office of Scientific and Technical Information (OSTI), April 2020. http://dx.doi.org/10.2172/1635458.

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Freudenberg, James S. Robustness of Feedback Systems with Several Modelling Errors. Fort Belvoir, VA: Defense Technical Information Center, June 1990. http://dx.doi.org/10.21236/ada225365.

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Tonn, B., R. Goeltz, and S. Purucker. Expert systems and microwave communication systems alarms processing: A feasibility study. Office of Scientific and Technical Information (OSTI), July 1987. http://dx.doi.org/10.2172/6211355.

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Saptsin, Vladimir, and Володимир Миколайович Соловйов. Relativistic quantum econophysics – new paradigms in complex systems modelling. [б.в.], July 2009. http://dx.doi.org/10.31812/0564/1134.

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This work deals with the new, relativistic direction in quantum econophysics, within the bounds of which a change of the classical paradigms in mathematical modelling of socio-economic system is oﬀered. Classical physics proceeds from the hypothesis that immediate values of all the physical quantities, characterizing system’s state, exist and can be accurately measured in principle. Non-relativistic quantum mechanics does not reject the existence of the immediate values of the classical physical quantities, nevertheless not each of them can be simultaneously measured (the uncertainty principle). Relativistic quantum mechanics rejects the existence of the immediate values of any physical quantity in principle, and consequently the notion of the system state, including the notion of the wave function, which becomes rigorously nondeﬁnable. The task of this work consists in econophysical analysis of the conceptual fundamentals and mathematical apparatus of the classical physics, relativity theory, non-relativistic and relativistic quantum mechanics, subject to the historical, psychological and philosophical aspects and modern state of the socio-economic modeling problem. We have shown that actually and, virtually, a long time ago, new paradigms of modeling were accepted in the quantum theory, within the bounds of which the notion of the physical quantity operator becomes the primary fundamental conception(operator is a mathematical image of the procedure, the action), description of the system dynamics becomes discrete and approximate in its essence, prediction of the future, even in the rough, is actually impossible when setting aside the aftereﬀect i.e. the memory. In consideration of the analysis conducted in the work we suggest new paradigms of the economical-mathematical modeling.

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Pestov, I. Modelling Studies of the Evolution of Vapour-Dominated Geothermal Systems. Office of Scientific and Technical Information (OSTI), January 1995. http://dx.doi.org/10.2172/895953.

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