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Editor’s message: Importance of peer-review in spreading reliable information J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2024-02-16 Juan Antonio Aguilar-Garib
Published in Journal of Microwave Power and Electromagnetic Energy (Vol. 58, No. 1, 2024)
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Dielectric and chemical composition characterization of ground water collected from different water sources J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2024-02-05 F. M. Modi, D. H. Gadani, V. A. Rana
Dielectric characterization of water samples, of different water sources such as borewell and step well located at three different places of the Gujarat State were carried out. Complex permittivity...
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Kinetics of microwave-assisted synthesis of ethyl hexanoate by using heterogeneous catalyst: process intensification and energy consumption analysis J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2024-02-05 Aarti Mulay, V. K. Rathod
The current work illustrates microwave-assisted synthesis of ethyl hexanoate without a solvent system using cationic resin (Amberlyst-15) as a catalyst. The effect of various parameters was evaluat...
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Electromagnetic and microwave properties of single-layer thermoplastic natural rubber (TPNR)/yttrium iron garnet (Y3Fe5O12)/magnetite (Fe3O4) composites backed by a perfect conductor J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2024-02-02 A. N. Yusoff, J. M. Sani
The use of a single-layer material for microwave applications continues to attract many researchers due to materials’ homogeneity in an acceptable range of thickness. This study outlines the microw...
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A novel wall parameter estimation approach based on transmission line method from through-wall radar measurements J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2024-01-24 Akhilendra Pratap Singh
A novel technique for estimation of the wall’s relative permittivity, thickness and conductivity from signals measured from the through-wall radar is presented in this paper. The retrieval process ...
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A three-stub waveguide impedance matching algorithm based on equivalent circuit analysis J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2024-01-22 Danfeng Zhou, Nouman Rasool, Zhengming Tang, Huacheng Zhu, Tao Hong
Three-stub waveguide is a common impedance matching device, which is widely used in microwave impedance matching system. In this paper, an impedance matching algorithm for three-stub waveguide with...
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3-D scanned oven geometry improves the modeling accuracy of the solid-state microwave heating process J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-11-02 Kartik Verma, Jarrod Nachtrab, Jake Dvorak, Peter Alley, Ran Yang, Hao Gan, Jiajia Chen
Solid-state-based microwave ovens are promising to mitigate the non-uniformity issue for their precise controlled microwave parameters. Multiphysics modeling is a useful tool for understanding comp...
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Graphene induced carbon-based fibre composite as microwave absorber for X-band frequency application J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-11-02 Akshita Yadav, Priyanka P. Singh, Ganeswar Nath
Stealth performance for any microwave absorbing material (MAM) is primarily controlled by the intrinsic characteristic properties of the composition of the composite. The inbuilt property of graphe...
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Editor’s message: writing and refereeing review papers J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-11-02 Aguilar-Garib Juan Antonio
Published in Journal of Microwave Power and Electromagnetic Energy (Vol. 57, No. 4, 2023)
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Effect of microwave treatment on the alkaline extraction of proteins and phenolics from perilla seed meal in varying pH conditions: An optimization study using multicomponent analysis J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-11-02 Rahul Kumar, Aniket Kamboj, Rakhi Singh, Rajni Chopra
Perilla seed meal (PSM) is a by-product rich in proteins and bioactive compounds obtained by cold pressed oil extraction method. Microwave is an efficient nonconventional technology usually used to...
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Experimental investigation of radio frequency heating uniformity of wheat flour surrounded by deionized water and NaCl solution J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-11-02 Welat Miran, T. Koray Palazoğlu
The present study proposes an approach to overcome the problem of corner/edge overheating of foods undergoing radio frequency heating. For testing, a container with a central rectangular compartmen...
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Dielectric properties of tobacco and tomato plant leaves over a broad frequency range J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-11-02 Pratipal D. Chauhan, Deepak H. Gadani, Vipin A. Rana
Complex permittivity of tomato and tobacco leaves have been measured over the 20 Hz − 2 MHz frequency range using a precision LCR-Meter, and over frequency range from 500 MHz to 15 GHz using a Vect...
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Editor’s message: valorising the experimental material presented in the data notes J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-08-17 Juan Antonio Aguilar Garib
Published in Journal of Microwave Power and Electromagnetic Energy (Vol. 57, No. 3, 2023)
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Electromagnetic interference shielding effectiveness and microwave absorption performance of plaster mortars containing metal waste chips in X-band frequency range J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-07-19 Kayhan Ates, Tolga Ziya Kocaer, Sukru Ozen, Niyazi Ugur Kockal
Abstract Exposure to electromagnetic radiation from digital devices, especially in the radio frequency range, affects human health in buildings. Furthermore, various electronic devices might be vulnerable to electromagnetic pollution in the same manner. Therefore, the electromagnetic interference (EMI) shielding technique is one of the electromagnetic compatibility (EMC) engineering phenomena that
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Process parameters of microwave heating-assisted vacuum evaporation of tomato juice: quality, energy consumption, exergy performance, and kinetic processing J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-07-17 Taher Sofizadeh, Jalal Khodaei, Hosain Darvishi, Nasser Behroozi-Khazaei, Mahmoud Koushesh Saba
Abstract Increasing heating performance and preservation of product quality are critical factors in the food industry. Although microwave-vacuum heating is applied in many food processes, there are many unanswered questions about its effects on sensitive foods. In this study, the tomato juice was concentrated in microwave-vacuum heating system and results compared with conventional and conventional-vacuum
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Study on the microwave heating temperature uniformity of an intelligent synergistic mode stirrer J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-07-15 Biao Yang, Feiyun Peng, Cheng Cheng, Zhaogang Wu, Hongbin Huang
Abstract Aiming at the intercoupling of multiple physics and the time-varying characteristics of boundary conditions in the microwave heating process, how to optimize the temperature uniformity of materials with a cooperative-mode stirrer is focused in this paper. First, the formation of standing waves can be effectively avoided by introducing the mode stirrer, thereby improving the heating efficiency
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Effect of the microwave and thermosonic vacuum concentration methods on quality parameters of hibiscus (hibiscus sabdariffa L.) extract and mathematical modeling of concentration J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-07-15 Cüneyt Dinçer, Timur Tongur, Taner Erkaymaz
Abstract This study investigates the modeling of the concentration of hibiscus extracts and the effect of the concentration process on some quality properties of hibiscus extracts. Absolute pressure was applied as 250 mbar in all concentration processes. Thermal vacuum concentration process was applied at 75 °C and 80 °C, thermosonic vacuum concentration process was applied at 75 °C and 0.02 W/mL AED
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Effect of seasonal variation in dielectric properties of groundwater from Vadodara region J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-07-15 Foram M. Modi, Deepak H. Gadani, Vipinchandra A. Rana
Abstract Groundwater samples were collected during different months from the same site from Vadodara district of Gujarat state. The complex permittivity of the water samples were precisely determined over the frequency span 20 Hz to 2 MHz. Complex permittivity spectral data were converted into complex impedance formalism. Obtained results were analysed to get information of seasonal variation in groundwater
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Editor’s message: about Artificial Intelligence as a tool for writing papers J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-05-15 Juan Antonio Aguilar-Garib
Published in Journal of Microwave Power and Electromagnetic Energy (Vol. 57, No. 2, 2023)
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Microwave-assisted hot air drying of bone broth-based sauce J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-05-07 Cüneyt Dinçer, Elif Aykın-Dinçer, Özer Kütükçü
Abstract In this study, it was aimed to bring the bone broth-based sauce into powder form by microwave assisted hot air drying method and to determine the drying characteristics of this product. Bone broth-based sauces were dried at the drying temperatures of 60, 70 and 80 °C, and at the microwave powers of 90, 180 and 360 W, until a moisture content of 10% (dry basis). The moisture ratio (MR) was
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An investigation on electromagnetic shielding effectiveness of metallic enclosure depending on aperture position J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-05-07 Sunay Güler
Abstract Electromagnetic compatibility (EMC) become one of the most important topics during electric vehicle design due to incorporating high voltage systems into conventional vehicle electronic architecture. Electromagnetic shielding enclosure is a conductive barrier utilized for protecting electronic circuits against external electromagnetic interference (EMI). Shielding effectiveness (SE) is a measure
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Investigating the influence of marination and storage on microwave dielectric properties of chicken breast meat J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-05-07 Samir Trabelsi
Abstract Simultaneous influence of marination and storage on dielectric properties of chicken meat was investigated through dielectric measurements at microwave frequencies. For this purpose, an open-ended coaxial probe and a vector network analyzer were used for measurement of the dielectric properties between 200 MHz and 20 GHz and at a room temperature of 22 °C. For all chicken samples, the same
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Permittivity measurements for roasted ground coffee versus temperature, bulk density, and moisture content J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-05-07 Rafael Pérez-Campos, José Fayos-Fernández, Juan Monzó-Cabrera
Abstract For a large variety of food products, the moisture content can be indirectly determined by measuring their dielectric properties. In the case of coffee, the permittivity knowledge can be applied to determine the moisture content indirectly or for online moisture meters in automatic control of coffee dryers. However, there is little data on the dielectric properties of roasted ground coffee
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Dielectric properties of Sphenarium purpurascens at 2.4 GHz J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-04-24 Tejinder Kaur, Jose Luis Olvera-Cervantes, Roberto Rojas-Laguna, Maria Elena Sosa-Morales, Alonso Corona-Chavez
Abstract The dielectric properties of edible grasshoppers (Sphenarium purpurascens) are presented at 2.4 GHz using the cavity perturbation technique. The samples are subjected to increasing temperatures (from 25 to 80 °C). It will be shown that the real part of the permittivity has a decreasing trend to rising temperature. As temperature increases, water evaporates; therefore the value of permittivity
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Editor’s message: textbooks for helping new generations to see further J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-01-30 Juan Antonio Aguilar Garib
Published in Journal of Microwave Power and Electromagnetic Energy (Vol. 57, No. 1, 2023)
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Study of multi-frequency heating based on the nonlinear response characteristics of magnetron to improve uniformity J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-01-26 Mengna Du, Zihao Zhang, Jie Huang, Huacheng Zhu, Yang Yang
Abstract The majority of microwave ovens on the market are powered by magnetrons, which can only produce a narrow-band frequency that has a large peak, resulting in poor uniformity. A method is proposed to improve nonuniform heating based on nonlinear response characteristics of the magnetron to produce multi-frequency. First, a multi-physics model of microwave heating is established to realize the
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Effects of microwave dryers on the properties of Jerusalem artichoke: physico-chemical, thermo-physical, energy consumption J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-01-19 Burcu Aksüt, Samet Kaya Dursun, Hakan Polatcı, Muhammed Taşova
Abstract Effects of pretreatments and drying methods on physico-chemical, thermo-physical, energy values were investigated. The longest drying duration was seen in control samples dried in hybrid microwave dryer at 350 W + 50 °C and the shortest in citric acid-treated samples dried in temperature-controlled microwave dryer. Citric acid-treated samples dried in temperature-controlled microwave dryer
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Advantages and problems of electric microwave processing plants with hybrid working chambers J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-01-16 Midhat Tuhvatullin, Yuri Arkhangelsky, Rustam Aipov, Arthur Akhmetshin, Dinar Atnagulov
Abstract This article presents information about the design and purpose of microwave processing plants of thermal, non-thermal microwave modification and microwave processing plants with hybrid working chambers that have not yet been widely used. This article also presents and justifies advantages of electric microwave processing plants with hybrid chambers over electric microwave processing plants
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Measurement and modelling of organic matter’s altering effect on dielectric behavior of soil in the region of 200 MHz to 14 GHz J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-01-13 Prachi Palta, Prabhdeep Kaur, K. S. Mann
Abstract Organic matter (OM) is one of the parameters which is commonly ignored while studying the properties of soil but it strongly affects and alters soil’s behavior and characteristics. The presented study analyzes the properties of soil like bulk density, and dielectric properties (ε′ and ε″), penetration depth, emissivity, and conductivity as a function of OM (0.78–17.28% of total soil mass)
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Theoretical and experimental studies on localized electric field during microwave drilling of metals J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2023-01-09 Jiaying Yan, Shichun Li, Zhi Yang, Wenjing Cai, Min Ou, Junzhe Li
Abstract Microwave drilling (MWD) is a nontraditional machining process. To further reveal the mechanism of the MWD of metals, a physical model of the electric field during the MWD was established and mathematically solved. Microwave drilling experiments were performed, and an ultra-depth microscope was used to investigate MWD morphologies under different conditions (gap scale d and tip radius R).
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Editor’s message: pondering hard and soft data in research and knowledge generation J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-11-17 Juan Antonio Aguilar-Garib
Published in Journal of Microwave Power and Electromagnetic Energy (Vol. 56, No. 4, 2022)
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Dielectric properties of cereal stubble infected with Bipolaris sorokiniana, Fusarium pseudograminearum and Pyrenophora teres in the microwave frequency range J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-11-09 Toni Petronaitis, Graham Brodie, Steven Simpfendorfer, Richard J. Flavel, Nigel W. M. Warwick
Abstract Cereal production in Australia is severely impacted by stubble-borne pathogens which can survive multiple seasons within cereal residues (stubble). Microwave radiation may be able to reduce or eliminate the pathogens, but the energy requirements first need defining. Hence, the dielectric properties of wheat and barley stubble with different pathogen loads were investigated at 10%, 15%, 30%
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Use of dielectric properties measurements at microwave frequencies for real-time monitoring of water activity in almonds J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-11-08 Samir Trabelsi
Abstract A dielectric-based method for real-time tracking of changes in water activity in almond kernels is proposed. The method is based on measurement of the dielectric properties at a single microwave frequency. Samples of almond kernels (Butte/Padre and Nonpareil) were placed in a chamber with high humidity and their dielectric properties were measured at 10 GHz and room temperature (22 °C) every
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Calculation of microwave heating temperature distribution based on SVD truncation J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-11-04 Biao Yang, Hongbin Huang, Hongtao Ma, Liexing Zhou, Qingzhi Du
Abstract In mathematical models of microwave heating with infinite-dimensional characteristics, it is difficult to use traditional numerical methods to improve computational efficiency. In this work, we propose a fast and accurate method to calculate the temperature distribution of materials under microwave heating. First, we analysed the relationship between the choice of model order and the solution
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Drops deformation influence on the microwaves interaction with a magnetodielectric emulsion J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-10-31 Sergey Turkin, Yuri Dikansky, Arthur Zakinyan
Abstract Experimental and theoretical studies of the interaction of microwave radiation with a frequency of 8.2 GHz with magnetodielectric emulsions under the influence of an external magnetic field causing deformation of the emulsion dispersed phase droplets have been carried out. The values of the external magnetic field strength are such that no ferromagnetic resonance is observed in the system
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Editor's message: highlighting the importance of transcendent conferences J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-08-17 Juan Antonio Aguilar-Garib
Published in Journal of Microwave Power and Electromagnetic Energy (Vol. 56, No. 3, 2022)
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Evaluation of graphite and TiO2 as susceptors for microwave dewaxing in ceramic shell casting processes of artworks J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-08-10 I. Pérez-Conesa, J. Fayos-Fernández, J. A. Aguilar Galea, J. Monzó-Cabrera, R. Pérez-Campos
Abstract The main problems of the traditional foundry dewaxing processes in fine arts workshops are the emission of gases, the loss of 80% of the wax, the high electrical consumption, and the high risks for the operators. The introduction of the microwave technology for dewaxing of ceramic shell molds allows to minimize some of these problems, although the use of electromagnetic susceptors that capture
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Dielectric properties of eggshell powder at 2.45 and 5.8 GHz relevant to dielectric heating J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-08-08 Prem Pankaj, Prabhdeep Kaur, Kuldip Singh Mann
Abstract In present studies, dielectric properties of eggshell powder were determined at microwave frequencies 2.45 and 5.8 GHz by varying temperature and moisture content in the range 15–75 °C and 0.5–8% (wet-basis) respectively, using cavity perturbation technique. Values of dielectric constant (ε′) and loss factor (ε″) increase with temperature and moisture content at both of these frequencies but
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Feasibility study of patch antenna for monitoring moisture content of made tea J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-08-05 V. D. Shivling, Amandeep Singh, Baban K. Bansod, Urvashi Nag, D. L. Meena
Abstract This study aims to analyze the patch antenna for moisture content measurement of made tea. The patch antenna-based system uses an air gap between the ground plane and an electrically conductive patch. The tea sample is contained in the air gap. The patch antenna design has a resonance frequency of 5 GHz. The resonance frequency and S11 parameters are measured for tea samples in the moisture
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Dielectric behavior of soil as a function of frequency, temperature, moisture content and soil texture: a deep neural networks based regression model J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-07-22 Prachi Palta, Prabhdeep Kaur, K. S. Mann
Abstract Dielectric behavior of soil has utmost applications in microwave remote sensing and soil treatment. In the present study, the soil's dielectric properties (Ɛ' and Ɛ") were measured using the vector network analyzer and an open-ended coaxial probe (85070E, Agilent Technologies) in the region of 0.2 to 14 GHz. The observed results showed that Ɛ' and Ɛ" strongly depend on frequency, texture,
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Self-sensing reinforced concrete for damage assessment and real time strength development in smart structures J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-07-22 Murat Ozturk
Abstract In this study, a self-sensing smart structure was developed with a novel approach. Electromagnetic wave based self-sensing structure designed by sending waves to the reinforced concrete structure through the reinforcement by using a coaxial cable. EM measurements were based on estimating the reflected EM waves through the reinforced concrete. Correlations between reflected EM wave, damage
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Editor's message: sufficient details in a manuscript, originality, and similarity score J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-05-16 Juan Antonio, Aguilar Garib
(2022). Editor's message: sufficient details in a manuscript, originality, and similarity score. Journal of Microwave Power and Electromagnetic Energy: Vol. 56, No. 2, pp. 69-70.
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Comparison of the effect of changing the spatial distance with exposure time to mobile phones radiation on the structure and function of the testis in NMRI mice J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-05-11 Homa Soleimani, Mahbobeh Gafori Ghadarijani, Fatemeh Rafiei, Parvindokht Bayat
Abstract The present study was conducted to compare the effect of changing the spatial distance and time radio frequency (RF) radiation from mobile phone in standby mode on the structure and function of testicles. NMRI mice were randomly divided into three groups. The first group was the control and the second group (exposed group) was divided into four subgroups: groups A (A1 and A2) and groups B
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The next-generation consumer microwave oven: a review J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-04-25 Eric F. Brown
Abstract It seems possible that Solid-State Radio Frequency (RF) transistors will one day replace magnetrons in consumer microwave ovens. These new ovens have the potential to be smaller and more energy efficient. Because they are closed loop systems, they can precisely cook food in ways that consumers have not seen before. This review outlines the basics of Solid-State RF systems and the consumer
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Modeling the effect of immersion fluids on the radiofrequency heating performance of cornflour J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-04-25 Qianyi Chen, Damla Dag, Fanbin Kong, Ran Yang, Jiajia Chen
Abstract Non-uniform heating is a significant challenge in radiofrequency (RF) heating of low moisture foods. Previous experiments showed that the immersion of fluids (air, deionized water, and soybean oil) changed the RF heating uniformity and rate of cornflour. However, the behind mechanism is not well understood. This study developed a finite-element-based model that incorporated quasi-static electromagnetics
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Different heat treatments and sealing effect on the nutritive value of Lucerne hay J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-04-23 M. S. R. Shishir, K. Plessis-Fraissard, G. I. Brodie, B. R. Cullen, L. Cheng
Abstract This study investigated the comparative effects of conventional hot-air oven heating (CHO), microwave heating (MW) and sealing effect on the nutritive value of lucerne hay. Equivalent energy (125 J.g−1) was applied with a 1.1 kW of MW oven for 60 seconds (s) or a 3.06 kW CHO oven for 350 s. The required equivalent energy level was measured based on a preliminary calibration trial. Two heating
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Mineralogical properties of ludwigite and the effects of microwave radiation on its particle characteristics and mineral liberation properties J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-04-23 Weijun Huang, Tao Jiang, Yajing Liu, Tonglai Guo
Abstract To effectively separate the valuable minerals in ludwigite, this study investigated the mineralogy of ore, particle-size distribution and mineral liberation characteristics. Most of the magnetite was intergrown with ascharite and serpentine. Nearly half of the serpentine existed in a dense, massive body. Most of the ascharite was encased in magnetite, and a small amount was embedded in the
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Editor’s message: the solid-state applications era J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-03-03 Juan Antonio Aguilar Garib
(2022). Editor’s message: the solid-state applications era. Journal of Microwave Power and Electromagnetic Energy: Vol. 56, No. 1, pp. 1-2.
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Investigation of sterilization by a microwave-generated low-temperature atmospheric pressure plasma jet J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-02-24 Wenjie Fu, Chaoyang Zhang, Xiaotong Guan, Xiaoyun Li, Yang Yan
Abstract An investigation of sterilization by a low-temperature microwave-generated atmospheric pressure plasma jet (MAPPJ) is presented. Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and yeast Saccharomyces species (Saccharomyces sp.) at 1.0 × 103 and 1.0 × 104 cfu/mL dilutions are investigated and fungi tested experimentally. The MAPPJ is generated by several watt continuous-wave
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Influence of blanching-freezing pre-treatment on moisture removal characteristics of microwave-dried potatoes J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-01-27 Mohsen Beigi
Abstract The aim of present work was mainly to study the influence of blanching-freezing pre-treatment on moisture removal characteristics of potato during microwave drying process. The influence of microwave power and the samples thickness was also assessed. For this purpose, microwave powers of 100, 350 and 550 W were practiced to dry discoid shape samples of fresh and blanched-frozen potatoes with
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Computational characterization of millimetre-wave heat exchangers with an AlN:Mo susceptor of multiple cylindrical elements J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-01-24 Catherine M. Hogan, Brad W. Hoff, Ian M. Rittersdorf, Vadim V. Yakovlev
Abstract A concept for a millimetre-wave (MMW) heat exchanger (HX) featuring AlN:Mo ceramic composite structures as electromagnetic absorbing elements (susceptors) has been recently introduced as a receiving device in power beaming applications. Earlier computational studies of electromagnetic and thermal processes have shown reasonable energy efficiency and exceptional uniformity of MMW-induced temperature
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Microwave heat treatment on kyanite for mullite formation and the preparation of zirconia toughened mullite J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2022-01-20 Satya Sai Srikant, Raghupatruni Bhima Rao
Abstract This article deals with the investigations on mullite ceramics formation from Kyanite sample- an alumino-silicate mineral with microwave heating. In the present investigation kyanite was heated in microwave sintering furnace with calcined alumina, silicon carbide, zirconium dioxide and binder for mullite formation as well as for the preparation of zirconia toughened mullite product. The results
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Editor message: farewell to our friend Bob Schiffmann J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2021-11-29 Juan Antonio Aguilar-Garib
(2021). Editor message: farewell to our friend Bob Schiffmann. Journal of Microwave Power and Electromagnetic Energy: Vol. 55, No. 4, pp. 271-272.
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Measurement and modelling of dielectric properties of different animal feed resources as a function of feed type and moisture content J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2021-10-21 Md Safiqur Rahaman Shishir, Mohan Jacob, Kenneth Leong, Long Cheng, Brendan Cullen, Graham Brodie
Abstract Dielectric properties of any particular material will determine the level of microwave (MW) heating. Therefore, measurement of the dielectric properties of MW treatment subject materials is necessary. This study investigated the dielectric properties of six roughages and three concentrate animal feeds across the microwave frequency range of 1 × 109 to 5 × 109 Hz. Six treatment groups, named
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Machine learning approach to transform scattering parameters to complex permittivities J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2021-11-11 Robert Tempke, Liam Thomas, Christina Wildfire, Dushyant Shekhawat, Terence Musho
Abstract This study investigates the application of artificial neural networks to determine the complex dielectric material properties derived from experimental VNA scattering parameter measurements. The study utilizes a finite element approach to synthetically generate data to train the neural network. The neural network was trained using a supervised learning approach and validated using experimental
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Prenatal chronic exposure to electromagnetic fields modulated adenosine deaminase activity in serum and brain of Wistar rats’ offspring J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2021-10-21 Behrooz Mohammadi, Mahdi Sadegh, Homa Soleimani
Abstract Considering the importance of the embryonic stage, we investigated the brain and serum ADA of offspring chronically exposed to low and high frequency electromagnetic field (EMF-LF/HF) during their embryonic period. Male and female rats were randomly selected for mating. After mating, the females were divided into four groups. The first group was exposed to extremely EMF-LF (50 Hz) through
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Study of the high heating efficiency and uniformity by multi-port sweep frequency microwave irradiations J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2021-10-21 Wu Yuanyuan, Lan Junqing, Yang Fengming, Hong Tao, Yang Yang, Zhu Huacheng, Tang Zhengming
Abstract As a clean energy, microwaves have been widely used in thermal engineering. However, in the traditional microwave heating process, it is difficult to obtain high heating efficiency and uniformity. In this paper, a novel multi-port sweep frequency heating method is proposed to solve this problem. Multi-physics modelling and experiment are carried out to study the mechanism, efficiency, and
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Determination of foreign-material content in uncleaned peanuts by microwave measurements and machine learning techniques J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2021-10-23 Sakol Julrat, Samir Trabelsi
Abstract Foreign-material content determination in uncleaned peanuts based on dielectric properties and bulk density measurements by microwave techniques is presented in this paper. A microwave free-space transmission technique was used at 10 GHz. Two measurement systems for measuring the dielectric properties of cleaned unshelled peanuts (nine-peanut pods) and uncleaned unshelled peanuts placed in
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Editor’s message: cooling evolution for validating microwave heating models J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2021-08-30
(2021). Editor’s message: cooling evolution for validating microwave heating models. Journal of Microwave Power and Electromagnetic Energy: Vol. 55, No. 3, pp. 173-174.
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Effect of intermittent microwave vacuum concentration on quality parameters of apple juice and sour cherry nectar and mathematical modeling of concentration J. Microw. Power Electromagn. Energy (IF 1.5) Pub Date : 2021-07-25
Abstract In this study, sour cherry nectar and apple juice were concentrated using thermal concentration (75, 80, and 85 °C), and intermittent microwave concentration (180, 300, and 450 W) under vacuum condition (at 250 mbar). Thirteen different mathematical models were used to describe the concentration kinetics of the samples. The Midilli model exhibited the best fit to all experimental data (R2