Browsing by Author "Bakır, Mehmet"
Now showing items 1-18 of 18
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Antenna-based microwave absorber for imaging in the frequencies of 1.8, 2.45, and 5.8 GHz
Alkurt, Fatih Özkan; Altıntaş, Olcay; Atcı, Ahmet; Bakır, Mehmet; Ünal, Emin; Akgöl, Oğuzhan; Delihacıoğlu, Kemal; Karaaslan, Muharrem; Sabah, Cumali (The International Society for Optics and Photonics (SPIE), 2018)We propose a microwave imaging structure with GSM, ISM, Wi-Fi, and WiMAX operating frequencies at 1.80, 2.45, and 5.80 GHz, respectively. The suggested structure is based on a microwave antenna-inspired absorber with ... -
Bandwidth Improvement in Bow-Tie Microstrip Antennas: The Effect of Substrate Type and Design Dimensions
Awl, Halgurd N.; Abdulkarim, Yadgar I.; Deng, Lianwen; Bakır, Mehmet; Muhammadsharif, Fahmi F.; Karaaslan, Muharrem; Ünal, Emin; Luo, Heng (Mdpi, 2020)In this work, the impact of substrate type and design dimensions on bow-tie microstrip antenna performance and bandwidth improvement is presented both numerically and experimentally at 4-8 GHz. The finite integration ... -
Characterization of chiral metamaterial sensor with high sensitivity
Dalgaç, Şekip; Bakır, Mehmet; Karadağ, Faruk; Ünal, Emin; Karaaslan, Muharrem; Sabah, Cumali (Elsevier Gmbh, 2020)In this study, a chiral metamaterial sensor applications are created by placing asymmetrically two meander line front and back side of the substrate layer. Characterization of the dielectric constant, thickness and loss ... -
Chiral Metamaterial Based Microfluidic Sensor
Bakır, Mehmet; Karaaslan, Muharrem; Karadağ, Faruk; Dalgaç, Şekip; Alkurt, Fatih Özkan; Bağmancı, Mehmet; Altıntaş, Olcay (Institute of Electrical and Electronics Engineers, 2018)This manuscript focus on developing of new metamaterials sensor based on distinction of different material and purity ratio sample. Unique side of this study is having very clear and sensitive results and presenting new ... -
Design of a Dual Band Metamaterial Absorber for Wi-Fi Bands
Alkurt, Fatih Özkan; Bağmancı, Mehmet; Karaaslan, Muharrem; Bakır, Mehmet; Altıntaş, Olcay; Karadağ, Faruk; Akgöl, Oğuzhan; Ünal, Emin (American Institute of Physics Inc., 2018)The goal of this work is to design and fabrication of a dual band metamaterial based absorber for Wireless Fidelity (Wi-Fi) bands. Wi-Fi has two different operating frequencies such as 2.45 GHz and 5 GHz. A dual band ... -
Fire Detection Behind a Wall by using Microwave Techniques
Alkurt, Fatih Özkan; Bağmancı, Mehmet; Karaaslan, Muharrem; Bakır, Mehmet; Altıntaş, Olcay; Karadağ, Faruk; Akgöl, Oğuzhan; Ünal, Emin (American Institute of Physics Inc., 2018)In this work, detection of the fire location behind a wall by using microwave techniques is illustrated. According to Planck's Law, Blackbody emits electromagnetic radiation in the microwave region of the electromagnetic ... -
Metamaterial characterization by applying different boundary conditions on triangular split ring resonator type metamaterials
Bakır, Mehmet; Karaaslan, Muharrem; Dincer, Furkan; Sabah, Cumali (Wiley, 2017)This study aims to demonstrate the effects of the different boundary conditions on triangular split ring resonator (TSRR)-shaped metamaterials in X band frequency regime. Three different TSSR-shaped metamaterials are ... -
Metamaterial sensor application concrete material reinforced with carbon steel fiber
Dalgaç, Şekip; Karadağ, Faruk; Ünal, Emin; Özkaner, Vedat; Bakır, Mehmet; Akgöl, Oğuzhan; Sevim, Umur Korkut; Delihacıoğlu, Kemal; Öztürk, Murat; Karaaslan, Muharrem; Sabah, Cumali (World Scientific Publ Co Pte Ltd, 2020)In this paper, a rectangular split ring resonator-type metamaterial (MTM) sensor application is demonstrated in order to examine concrete materials. First, different types of concrete materials including carbon steel fiber ... -
Metamaterial-based energy harvesting for GSM and satellite communication frequency bands
Bakır, Mehmet; Karaaslan, Muharrem; Karadağ, Faruk; Ünal, Emin; Akgöl, Oğuzhan; Alkurt, Fatih Özkan; Sabah, Cumali (SPIE - Society of Photo-Optical Instrumentation Engineers, 2018)A metamaterial-based energy harvesting structure has been designed and experimentally tested in this study. The proposed structure has square and split ring resonators placed in different angles on the back and front sides ... -
Microfluidic and Fuel Adulteration Sensing by Using Chiral Metamaterial Sensor
Bakır, Mehmet; Karaaslan, Muharrem; Ünal, Emin; Karadağ, Faruk; Alkurt, Fatih Özkan; Altıntaş, Olcay; Dalgaç, Şekip; Sabah, Cumali (The Electrochemical Society, 2018)In this study, Chiral Metamaterial Sensor (CMS), which is designed by utilizing a Split Ring Resonators (SRR) has been employed to reveal the two different types of sensor applications by experimentally and numerically. ... -
Microfluidic sensor applications by using chiral metamaterial
Dalgaç, Şekip; Bakır, Mehmet; Karadağ, Faruk; Karaaslan, Muharrem; Akgöl, Oğuzhan; Ünal, Emin; Sabah, Cumali (World Scientific Publishing Company, 2020)Chiral metamaterial-based sensor is designed for sensing the change in substance ratio of chemical substances when combined with distilled water. These samples have been prepared with 10%, 50% and 90% volume fraction of ... -
Microwave metamaterial absorber for sensing applications
Bakır, Mehmet; Karaaslan, Muharrem; Ünal, Emin; Akgöl, Oğuzhan; Sabah, Cumali (Elsevier, 2017)A metamaterial absorber (MA) based sensor is designed and analysed for various important applications including pressure, temperature, density, and humidity sensing. Material parameters, as well as equivalent circuit model ... -
Multifunctional metamaterial sensor applications based on chiral nihility
Bakır, Mehmet; Karaaslan, Muharrem; Akgöl, Oğuzhan; Sabah, Cumali (Springer, 2017)In this paper, chiral nihility based pressure, density, temperature and moisture content metamaterial sensor applications are investigated in detail. A "chiral nihility'' medium in which both the permittivity and the ... -
Octagonal Shaped Metamaterial Absorber Based Energy Harvester
Alkurt, Fatih Özkan; Altıntaş, Olcay; Bakır, Mehmet; Tamer, Ahmet; Karadağ, Faruk; Bağmancı, Mehmet; Karaaslan, Muharrem; Ünal, Emin; Akgöl, Oğuzhan (Kaunas University of Technology, 2018)In this study, a novel octagonal shaped metamaterial based broadband absorber is proposed for energy harvesting at WIMAX wireless communication band. The proposal has an absorption of 99.97 % at 5.5 GHz with a bandwidth ... -
Polarization independent broadband metamaterial absorber for microwave applications
Bağmancı, Mehmet; Akgöl, Oğuzhan; Özaktürk, Melikşah; Karaaslan, Muharrem; Ünal, Emin; Bakır, Mehmet (John Wiley and Sons Inc., 2019)A new polarization independent broadband metamaterial absorber (MA) structure based on split ring resonators which are loaded with lumped elements and via connection lines is proposed. The designed structure shows a perfect ... -
Sensory applications of resonator based metamaterial absorber
Bakır, Mehmet; Karaaslan, Muharrem; Akgöl, Oğuzhan; Altıntaş, Olcay; Ünal, Emin; Sabah, Cumali (Elsevier GmbH, 2018)Metamaterials are attractive media for scientific society for their potential multi-functional and a wide range of applications due to their unusual electromagnetic properties. In this paper, we present several important ... -
Tunable energy harvesting on UHF bands especially for GSM frequencies
Bakır, Mehmet; Karaaslan, Muharrem; Altıntaş, Olcay; Bağmancı, Mehmet; Akdoğan, Volkan; Temurtaş, Feyzullah (Cambridge University Press, 2018)Metamaterial-based energy harvesting structures operating at GSM goo and GSM 1800 frequency bands have been proposed. The basic structure is composed of four nested U-shaped elements on the front and back side of the ... -
Wideband metamaterial absorber based on CRRs with lumped elements for microwave energy harvesting
Bağmancı, Mehmet; Karaaslan, Muharrem; Altıntaş, Olcay; Karadağ, Faruk; Tetik, Erkan; Bakır, Mehmet (Taylor & Francis, 2018)A novel metamaterial absorber structure is designed and characterized for microwave energy harvesting. The suggested structure is composed of two circular ring resonators with different dimensions. Due to harvesting ...
