Majlesi Journal of Telecommunication Devices http://journals.iaumajlesi.ac.ir/td/index/index.php/td <p>The scope of MJTD includes all aspects of telecommunication device and information technology, from mathematical modeling to practical engineering. The editorial board is international and original unpublished papers are welcome from throughout the world. The journal is devoted primarily to research papers, but very high quality survey and tutorial papers are also published.</p> <p>There is no publication charge for the authors.</p> Majlesi Publications Corporation en-US Majlesi Journal of Telecommunication Devices 2423-4117 Investigation on Electromagnetic Properties of PLA/Carbon/Copper Antennas for Breast Cancer Detection http://journals.iaumajlesi.ac.ir/td/index/index.php/td/article/view/632 <p>Breast cancer is the most common cancer of women in the globe. Microwave imaging has low power and longer wavelength signals to receive information about breast tissues and guarantees a safer and more accurate modality for regular breast control. So, the antenna is a crucial element in the microwave imaging system. This study involves analysis of the simulation results of the linear and planar microstrip array antennas in terms of high gain. In the series antenna design stage, the antenna models with high gain and directional radiation are aimed. 1x4 and 2x2 array antenna models are prepared with PLA/Carbon insulating material. Array antennas, three-dimensional full-wave electromagnetic structure analysis are designed using the CST (Computer Simulation Technology) Microwave Studio program. In the design phase, the transmission line losses of the array antennas are tried to be optimized by using T-junction and Wilkinson power divider techniques and impedance matching is realized. Also, the redundant areas in the turns are removed to minimize the undesirable reflections in the transmission line and to reduce the capacitive loading. Since the 1x4 array antenna performs better than the 2x2 array antenna, it was preferred for breast cancer simulation.</p> Emine Avşar Aydin Ahmet Refah Torun ##submission.copyrightStatement## 2021-03-01 2021-03-01 10 1 1 7 Depth Image Resolution Enhancement Using Discrete Wavelet Transform and Convolution Neural Networks http://journals.iaumajlesi.ac.ir/td/index/index.php/td/article/view/600 <p>The depth image plays an increasingly important role in fundamental research and daily applications, with the reducing the price and increasing the number of affordable and portable depth cameras. Infrared sensors or depth sensors are widely used to control dynamic and static 3D scenes. However, the depth image quality is limited to low-quality images, as the infrared sensor does not have high resolution. Therefore, given the problems and the importance of using 3-D images, the quality of these images should be improved in order to provide accurate images from depth cameras. In this paper a resolution enhancement method of depth images using convolutional neural networks is considered. A convolutional neural network with a depth of 20 and three layers and a pre-trained neural network is used. We developed the system and tested its performance for two datasets, Middlebury and EURECOM Kinect Face. Results show for EURECOM Kinect Face images, PSNR improvement is approximately 7 to 16 dB and for Middlebury images the PSNR improvement is about 6 to 12 dB.</p> Mohsen Ashourian Seyed Mehrdad Mahdavi ##submission.copyrightStatement## 2020-02-13 2020-02-13 10 1 A Novel Approach for Low Phase Noise Voltage Controlled Oscillator Design based on TSMC 0.18 um Technology http://journals.iaumajlesi.ac.ir/td/index/index.php/td/article/view/650 <p class="MJEE-Abstract">In this paper, a new structure of Voltage Control Oscillator (VCO) to reduce the phase noise using two plans of a variable voltage capacitor is proposed. The aim of the current paper is to analyse two structure of a completely integrated 3.7 GHz LC-VCO based on TSMC 0.18 um technology. In the first plan for different voltages with variable voltage capacitors in this circuit can be achieved to a suitable phase noise of about 125 dB per Hz and in the second plan, a noise of -123 dB per Hz is achieved in the deviation frequency of 1 MHz. Also, the Figure of Merit (FOM) values for the first plan of -4/186 and for the second plan of –4/184 are achieved and the power consumption is 10 mW.</p> Farbod Setoudeh Naeimeh Nouri ##submission.copyrightStatement## 2021-03-01 2021-03-01 10 1 17 22 Electrical Discharges: An Emerging Modality in Sterilization, Disinfection, and Therapeutics http://journals.iaumajlesi.ac.ir/td/index/index.php/td/article/view/651 <p>Electrical discharges are the key mechanism to the generation of atmospheric pressure plasmas which are further classified as equilibrium and non-equilibrium plasmas, also referred to as thermal and non-thermal plasmas. The technological advancement of non-thermal plasma has extended its potential clinical non-invasive applications in a multitude of disciplines such as dermatology, ophthalmology and oncology, etc. to bolster tissue generation, refraction error correction and necrosis of the cancerous cells in the domain of plasma medicine, respectively. A fundamental on the various types of discharges and their mechanism is investigated. A perspective on the application of non-thermal plasmas in the domains such as sterilization and disinfection is presented in this review. We have focused on the plasma therapeutics and its significance as a clean and dry therapy to treat superficial skin diseases via the mechanism of proliferation of basal skin cells and prothrombin stimulation to cauterize the blood through Argon Plasma generated by Argon Plasma Coagulator. We propose to fabricate atmospheric pressure plasma devices and understanding of the associated plasma radicals that aids in the activation of biochemical and biomolecular reactions to treat the cutaneous and sub-cutaneous diseases.</p> Soumyadeep C. Sarkar Niharika Verma Pawan Kumar Tiwari ##submission.copyrightStatement## 2021-03-01 2021-03-01 10 1 23 32 Improvement of Software-Defined Network Performance Using Queueing Theory: A Survey http://journals.iaumajlesi.ac.ir/td/index/index.php/td/article/view/653 <p>Software-Defined Networking (SDN) is a growing network technology that has brought significant benefits to a wide range of disciplines, from science to technology to various fields. This structure can be used in network-based environments, data centers and various research sites. OpenFlow is one of the most widely used protocols for interaction between a controller and a switch in a Software-Defined Networking. Understanding the performance and limitations of the network defined by open source software, including bottlenecks and security vulnerabilities due to the centralized network structure, are important prerequisites for the efficient deployment of these systems. These points of view led researchers to examine various related mathematical models to address these issues. Queueing theory provides the most important and accurate model for evaluating the performance of the SDN networks affected by these restrictions, which has attracted the attention of researchers recently. Regarding to extensive mathematical modeling, this theory has also been used to improve network efficiency. Researchers have used this theory to investigate operational power and improve time consumption and control of data planes due to the nature of classification and storage of packets in SDN buffers. These methods overcome controller performance bottlenecks and increase SDN control capacity, especially for large distributed networks. In this paper, we examine the queueing models for different applications in different layers of SDN, in which researchers use these methods to monitor network loads, evaluate and predict performance changes due to diversity in network traffic. We introduce and review a collection of articles that explore, different applications of Queueing theory in SDN networks. In addition, in order to increase the efficiency of this research, detailed comparisons are performed in terms of structure, mathematical models and the final simulation results.</p> Ava Tahmasebi Ahmad Salahi Mohammad Ali Pourmina ##submission.copyrightStatement## 2021-03-01 2021-03-01 10 1 33 43 Clustering Methods Survey in VANET on Roads and Mountain Trails with High Reliability http://journals.iaumajlesi.ac.ir/td/index/index.php/td/article/view/654 <p>VANETs are one of the important technologies in recent decade. This importance is evident which can be used in road and mountains trails and also provides other information to vehicle from roads. There are many challenges and problems in this networks which can cited as routing, clustering, quality of services criteria, energy consumption, RSU placement and etc. This article try to study and survey about VANET’s clustering methods in roads and mountain trails with high reliability.</p> Mohammad Ali Pourmina Babak Mosharmovahed Sam Jabbehdari ##submission.copyrightStatement## 2021-03-01 2021-03-01 10 1 45 54