Makale Koleksiyonu by İSTE Author "Altıntaş, Olcay"
Now showing items 1-20 of 37
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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 ... -
Artificial neural network approach for locomotive maintenance by monitoring dielectric properties of engine lubricant
Altıntaş, Olcay; Aksoy, Murat; Ünal, Emin; Akgöl, Oğuzhan; Karaaslan, Muharrem (Elsevier, 2019)In this paper, we proposed an approach for locomotive maintenance systems by observing engine lube oil. The mechanical particles in lube oil give information about locomotive engine system condition. The engine lubricant ... -
Broad band metamaterial absorber based on wheel resonators with lumped elements for microwave energy harvesting
Karaaslan, Muharrem; Bağmancı, Mehmet; Ünal, Emin; Akgöl, Oğuzhan; Altıntaş, Olcay; Sabah, Cumali (Springer, 2018)A new metamaterial absorber structure is designed and characterized both numerically and experimentally for microwave energy harvesting applications. The proposed structure includes four wheel resonators with different ... -
Chemical Liquid and Transformer Oil Condition Sensor Based on Metamaterial-Inspired Labyrinth Resonator
Altıntaş, Olcay; Aksoy, Murat; Ünal, Emin; Karaaslan, Muharrem (Electrochemical Society Inc., 2019)In this study, the labyrinth resonator based chemical liquid and transformer oil condition sensor are presented in a microwave frequency range both numerically and experimentally. The transmission coefficient is observed ... -
Design and study of a metamaterial based sensor for the application of liquid chemicals detection
Abdulkarim, Yadgar I.; Deng, Lianwen; Luo, Heng; Huang, Shengxiang; Karaaslan, Muharrem; Altıntaş, Olcay; Bakır, Mehmet; Muhammadsharif, Fahmi F.; Awl, Halgurd N.; Sabah, Cumali; Al-badri, Khalid Saeed Lateef (Elsevier, 2021)The detection of chemical samples having close dielectric response is a big challenge as the detection principle is driven by the variations in the dielectric parameters of the investigated samples. In the current work, a ... -
Design of a linear to circular polarization converter integrated into a concrete construction for radome applications
Öztürk, Murat; Sevim, Umur Korkut; Altıntaş, Olcay; Ünal, Emin; Akgöl, Oğuzhan; Karaaslan, Muharrem; Sabah, Cumali (Cambridge University Press, 2021)In this paper, we present a linear to circular polarization converter integrated in a concrete structure to eliminate signal transmission problem originated from the concrete buildings in microwave regime. Two polarization ... -
Design of a metamaterial inspired omega shaped resonator based sensor for industrial implementations
Altıntaş, Olcay; Aksoy, Murat; Ünal, Emin (Elsevier, 2020)In this study, the omega shaped resonator based sensor structure by inspiring of metamaterial (MTM) concept is presented at X-band frequency regime for industrial purpose both numerically and experimentally. Four distinguishing ... -
Design of a wide band metasurface as a linear to circular polarization converter
Altıntaş, Olcay; Ünal, Emin; Akgöl, Oğuzhan; Karaaslan, Muharrem; Karadağ, Faruk; Sabah, Cumali (World Scientific Publishing Co. Pte Ltd, 2017)In this paper, we present a wide band metasurface (MS) polarization converter which converts a linearly polarized signal to a right-handed or left-handed circularly polarized signal both numerically and experimentally. The ... -
Design of metasurface polarization converter from linearly polarized signal to circularly polarized signal
Akgöl, Oğuzhan; Ünal, Emin; Altıntaş, Olcay; Karaaslan, Muharrem; Karadağ, Faruk; Sabah, Cumali (Elsevier GmbH, 2018)In this study, we both numerically and experimentally present a metasurface (MS) polarization converter to transform linearly polarized signal into circularly polarized one. The unit cell consists of two rectangular metallic ... -
Electromagnetic simulations of polarization-insensitive and wide-angle multiband metamaterial absorber by incorporating double asterisk resonator
Abdulkarim, Yadgar I.; Deng, Lianwen; Luo, Heng; Huang, Shengxiang; He, Longhui; Li, Yuhan; Muhammadsharif, Fahmi F.; Altıntaş, Olcay; Sabah, Cumali; Karaaslan, Muharrem (Indian Acad Sciences, 2020)A novel multiband metamaterial absorber (MTMA) is proposed which is capable of well presenting a polarization-insensitive and wide incident angle stability in the microwave frequency range. The proposed MTMA comprising two ... -
Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry
Mazare, Alin Gheorghita; Abdulkarim, Yadgar I.; Karim, Ayoub Sabir; Bakır, Mehmet; Taouzari, Mohamed; Muhammadsharif, Fahmi F.; Appasani, Bhargav; Altıntaş, Olcay; Karaaslan, Muharrem; Bizon, Nicu (MDPI, 2022)A new design of a triple band perfect metamaterial absorber based on Pythagorean fractal geometry is proposed and analyzed for terahertz sensing applications. The proposed design showed an enhanced sensing performance and ... -
Enhancement of image quality by using metamaterial inspired energy harvester
Alkurt, Fatih Özkan; Altıntaş, Olcay; Özaktürk, Melikşah; Karaaslan, Muharrem; Akgöl, Oğuzhan; Ünal, Emin; Sabah, Cumali (Elsevier, 2020)Metamaterial energy harvester based subwavelength imaging structure is presented. Besides, 2x2 array patch antenna is designed to create incident radiated signal towards the proposed harvester structure. Harvested energy ... -
Fluid, Strain and Rotation Sensing Applications by Using Metamaterial Based Sensor
Altıntaş, Olcay; Aksoy, Murat; Akgöl, Oğuzhan; Ünal, Emin; Karaaslan, Muharrem; Sabah, Cumali (Electrochemical Society Inc., 2017)We propose a design of a metamaterial based sensor to be used in various applications including micro-fluid, strain and rotation sensing. The structure has a simple geometry composed of a single circular split ring resonator ... -
Fractal metamaterial based multiband absorber operating in 5G regime
Baqir, Muhammad Abuzar; Latif, H.; Altıntaş, Olcay; Akhtar, Majid Niaz; Karaaslan, Muharrem; Server, H.; Hameed, Musab; Idrees, Nazar Muhammad (Elsevier, 2022)Multiband absorption is the interest of the microwave communities due to several applications in sensing, filtering, and stealth. Usually, the stacking of metal and dielectric multilayered structures form a multiband ... -
Investigation of cotton fabric composites as a natural radar-absorbing material
Ayan, Muhammet Çağrı; Kiriş, Serap; Yapıcı, Ahmet; Karaaslan, Muharrem; Akgöl, Oğuzhan; Altıntaş, Olcay; Ünal, Emin (Emerald Group Publishing Ltd., 2020)Purpose The purpose of this paper is to investigate cotton fabric behavior that is exposed to radar waves between selected operation frequencies as an alternative radar-absorbing material (RAM) response. Cotton fabric ... -
Linear to left- and right-hand circular polarization conversion by using a metasurface structure
Akgöl, Oğuzhan; Altıntaş, Olcay; Ünal, Emin; Karaaslan, Muharrem; Karadağ, Faruk (Cambridge University Press, 2018)By using a metasurface (MS) structure, a linearly polarized wave is converted to circularly polarized waves. Both right- and left-handed circular polarizations (RHCPs and LHCP) are obtained by a simple configuration in the ... -
Low-Cost Antenna-Array-Based Metamaterials for Non-Invasive Early-Stage Breast Tumor Detection in the Human Body
Hamza, Musa N.; Abdulkarim, Yadgar I.; Saeed, Salah Raza; Altıntaş, Olcay; Mahmud, Rashad H.; Appasani, Bhargav; Ravariu, Cristian (MDPI, 2022)Microstrip patch antennas have been used in many applications since their appearance. Despite their great promise, their narrow bandwidth and the loss at high-frequency bands have limited their usage in medical applications. ... -
Metamaterial absorber sensor design by incorporating swastika shaped resonator to determination of the liquid chemicals depending on electrical characteristics
Abdulkarim, Yadgar I.; Deng, Lianwen; Altıntaş, Olcay; Ünal, Emin; Karaaslan, Muharrem (Elsevier, 2019)In this work, sensor abilities of the metamaterial absorber based on swastika shaped resonator are developed both theoretically and experimentally at X-band frequency range. The structure is consisted of a swastika shaped ... -
Metamaterial absorber-based multisensor applications using a meander-line resonator
Akgöl, Oğuzhan; Altıntaş, Olcay; Dalkılınç, Elif Eda; Ünal, Emin; Karaaslan, Muharrem; Sabah, Cumali (Society of Photo-Optical Instrumentation Engineers, 2017)A metamaterial (MTM) absorber-based multifunctional sensor is numerically and experimentally realized using meander-line resonators. The proposed sensor device can be used to measure pressure, density, and humidity with ... -
Metamaterial based sensor integrating transmission line for detection of branded and unbranded diesel fuel
Tamer, Ahmet; Karadağ, Faruk; Ünal, Emin; Abdulkarim, Yadgar I.; Deng, Lianwen; Altıntaş, Olcay; Karaaslan, Muharrem (Elsevier, 2020)In this paper, a high sensitive metamaterial - based liquid sensor employing microstrip transmission line have been designed and investigated for detection of authentic and inauthentic diesel samples both numerically and ...
