International Journal of Electrical and Computer Engineering Research <p>International Journal of Electrical and Computer Engineering Research (IJECER) is an academic journal that publishes research articles and review articles emerging from theoretical and experimental studies in all fields of electrical and computer engineering. IJECER is an open access, free publication and peer-reviewed journal. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author. In addition, there is no APC fee. In order for the articles submitted to the journal to be evaluated, they should not have been published elsewhere before and the similarity rate should be less than 20%. <br />The main aim of IJECER is to publish quality original scientific papers and bring together the latest research and development in various fields of science and technology related electrical and computer enginerring. IJECER is published quarterly a year, in March, June, September and December. Permanent links to published papers are maintained by using the Digital Object Identifier (DOI) system by CrossRef.</p> <p>The topics related to this journal include but are not limited to:</p> <table border="0" width="100%"> <tbody> <tr> <td>Electrical engineering<br />Computer engineering<br />Electronics engineering<br />Biomedical engineering<br />Mechatronics engineering<br />Electrical energy and power<br />Internet of things emerging technologies<br />Internet technologies, and smart devices<br />Computer science and information technology<br />Artificial intelligence and soft computing<br />Computational science and engineering<br />Big data and cloud computing<br />Signal, image and speech processing<br />Networking and the internet</td> <td>Pattern recognition<br />Renewable energy<br />Algorithms and applications<br />Green technologies in information<br />Circuits and electronics<br />Power electronics and drives<br />Wireless sensor network<br />Computer software engineering<br />Communications and wireless networks<br />Sensors and actuators<br />Computer vision and robotics<br />Embedded systems<br />Radar and sonar systems<br />Robotics</td> </tr> </tbody> </table> en-US (Yunus Uzun) (Yunus Uzun) Wed, 15 Jun 2022 20:17:20 +0300 OJS 60 Multiphysics Modeling to Assist Microwave Cavity Design for Food Processing <p>Microwave technology has many current applications. It is very useful for food processing, including domestic cooking and warming-up and industrial heating and drying. It heats faster than conventional applications; however, in most cases result in non-uniform temperature distribution. Adequate cavity and equipment designs can reduce the impact of these heterogeneities and using multiples magnetrons is a possibility to mitigate hot and cold spots. Yet, the literature lacks methods to evaluate and compare multiple magnetrons designs. This study aimed to develop a procedure to evaluate the number and position of magnetrons connected to an application cavity using multiphysics modelling and simulation of the microwave distribution and heating of a food model. It was based on evaluating the electric field distribution into a selected working volume filled with air or a mixture of air-potato and the consequent effective power absorbed and temperature distribution into the air-potato medium. The assisted methodology with process simulation offers an insight into food temperature distribution, which would be very difficult to obtain experimentally or in any equipment design methodology. In this case study, it was found that up to 6 magnetrons are good enough when active in approximately 0.16 m3 cavity with a load that fills 10% of its volume.</p> Ana Salvador, Jhony Teleken, Xisto Lucas Travassos, Sergio Luciano Avila, Bruno Carciofi Copyright (c) 2022 International Journal of Electrical and Computer Engineering Research Wed, 15 Jun 2022 00:00:00 +0300 Design and Fabrication of a Flapping-Wing Robot Based on Slider-Crank Mechanism <div> <p class="Abstract">Tailless Flapping-Wing Micro Air Vehicles (FW-MAVs) have gained more attention recently because they utilize energy more efficiently compared to fixed-wing aircraft and rotorcrafts. FW-MAVs could be used commercially to explore confined spaces with insufficient air or serve as surveillance robots. However, due to their use of unsteady aerodynamics and small size, the research and design process is very complicated. In this paper, I propose a flight mechanism for a light-weighted, two-winged, hummingbird-inspired flapping-wing robot. Five versions of the robot were built; each version improved upon the issues of the previous one. Calculations were performed to optimize the stroke amplitude and the transmission ratio of the gears. Four groups of control experiments were conducted to investigate the relationship between different factors (voltage, motor type, wing area, and the number of veins) and the robot’s lift, which was monitored by a pressure sensor. I analyzed the results from the experiments and built a final version of the robot based on a slider-crank mechanism. The main structure of the final version is made of three 3mm carbon fiber boards, and the wings are made of 0.025mm PET (polyethylene terephthalate) material, reinforced by three carbon fiber rods: two 0.5mm ones across the membrane and a 1mm one at the leading edge. The robot weighs 16.3g and can produce enough lift to overcome its gravity under 9V with an off-board power source by exhibiting an upward trend during a tethered flight test.</p> </div> Jue Wang Copyright (c) 2022 International Journal of Electrical and Computer Engineering Research Wed, 15 Jun 2022 00:00:00 +0300 Design and Simulation of Wideband, High Gain Matrix Antenna with Beam Steering and Low Side-Lobe Levels Features <p>In this paper, a matrix antenna composed of radiating pixels elaborated in meta-materials is presented. The pixels are surmounted with a frequency selective structure and closed with four metallic walls. The cavity is excited by a radiating patch and filled with dielectric. This dielectric makes it possible to reduce the overall width of the pixel by increasing the dielectric length of the cavity while maintaining the performances of the pixel. The pixel is reduced to a width of 50.96 mm (0.34*λ) at 2 GHz. The -10 dB fractional bandwidth of the pixel is 22% (2-2.5 GHz). The pixel is then placed in a 17 elements matrix to achieve high steering angles. The optimization focuses on the steering capacity, the bandwidth and the side-lobes levels. On the whole band, the steering angle is more than 70° and the antenna achieves low side-lobes levels at less than -9.9 dB. A device to reduce the mutual coupling between the elements by using soft surfaces is also presented. These surfaces allow to widen the matching band while the steering is produced.</p> Paul Karmann, Edson Martinod, Joël Andrieu, Mohamad Rammal Copyright (c) 2022 International Journal of Electrical and Computer Engineering Research Wed, 15 Jun 2022 00:00:00 +0300