Seçmen, Mustafa

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Profile URL
https://gcris.yasar.edu.tr/handle/123456789/12616
Name Variants
Job Title
Prof.Dr.
Email Address
Main Affiliation
01.01.09.02. Elektrik- Elektronik Mühendisliği
Status
Current Staff
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ORCID ID
0000-0002-7656-4051
Scopus Author ID
16025424000
Turkish CoHE Profile ID
Google Scholar ID
Cx6NzgAAAAJ
WoS Researcher ID
I-9720-2019
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mustafa.secmen.jpg (8.57 KB)

Sustainable Development Goals

NO POVERTY1
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ZERO HUNGER2
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GOOD HEALTH AND WELL-BEING3
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QUALITY EDUCATION4
QUALITY EDUCATION
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GENDER EQUALITY5
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CLEAN WATER AND SANITATION6
CLEAN WATER AND SANITATION
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AFFORDABLE AND CLEAN ENERGY7
AFFORDABLE AND CLEAN ENERGY
1
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DECENT WORK AND ECONOMIC GROWTH8
DECENT WORK AND ECONOMIC GROWTH
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INDUSTRY, INNOVATION AND INFRASTRUCTURE9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
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REDUCED INEQUALITIES10
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SUSTAINABLE CITIES AND COMMUNITIES11
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RESPONSIBLE CONSUMPTION AND PRODUCTION12
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CLIMATE ACTION13
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LIFE BELOW WATER14
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LIFE ON LAND15
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PEACE, JUSTICE AND STRONG INSTITUTIONS16
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Documents

110

Citations

775

h-index

11

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Documents

90

Citations

299

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Scholarly Output

94

Articles

33

Views / Downloads

0/2

Supervised MSc Theses

9

Supervised PhD Theses

1

WoS Citation Count

207

Scopus Citation Count

293

Patents

0

Projects

3

WoS Citations per Publication

2.20

Scopus Citations per Publication

3.12

Open Access Source

18

Supervised Theses

10

JournalCount
Radio Science4
Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi2
23nd Signal Processing and Communications Applications Conference (SIU)2
Physica Scripta2
IEEE Antennas and Wireless Propagation Letters2
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Scholarly Output Search Results

Now showing 1 - 10 of 94
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    Conference Object
    Citation - Scopus: 2
    Dual-Band 2×2 Cavity-Backed Antenna with Enhanced Out-of-Band Suppression for Tx/Rx Communication of UAVs at Ku-Band
    (Institute of Electrical and Electronics Engineers Inc., 2023) Yavuz Asci; Mustafa Seçmen; Asci, Yavuz; Secmen, Mustafa
    This study introduces a dual-band linearly polarized 2×2 element cavity-backed antenna for unmanned aerial vehicles (UAVs). The proposed antenna can cover entire Rx (10.512.5 GHz) and Tx (13.7514.5 GHz) bands of Satcom and datalink operations at Ku-band. The radiating part of the antenna contains four (2×2) radiating slots which are excited by a coupling slot at the end of the feeding waveguide and a 2×2 cavity power divider. Additional baffles placed between radiating slots at the aperture are used to increase the bandwidth and gain values of in-band and slightly improve out-of-band suppression. The antenna is fed by a rectangular waveguide which includes two third-order E-plane band-stop filters being placed on the opposite sides of broad wall of the waveguide to significantly suppress out-of-band frequencies between Tx/Rx bands and below Rx band which gives dual-band characteristics. The proposed full metal antenna has Rx and Tx bandwidths of 10.3612.54 GHz (|S11|< -10 dB, FBW = 16%) and 13.6314.7 GHz (|S11|< -10 dB, FBW = 7%) respectively. It has peak gain of 14.3 dBi with a stable in-band gain of 14.15 ± 0.15 dBi. Out-of-band rejection level of above 20 dB is obtained at the undesired bands of 9.810 GHz and 12.813.2 GHz. © 2024 Elsevier B.V. All rights reserved.
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    Article
    Citation - WoS: 14
    Citation - Scopus: 20
    Dual-Band Omnidirectional and Circularly Polarized Slotted Waveguide Array Antenna for Satellite Telemetry and Telecommand
    (Institute of Electrical and Electronics Engineers Inc., 2021) Ceyhan Türkmen; Mustafa Seçmen; Secmen, Mustafa; Turkmen, Ceyhan
    In this letter the design and 3-D-printed manufacturing of an omnidirectional and circularly polarized dual-band antenna for telemetry/telecommand (TMTC) applications in satellite communication on space segment are described. The antenna consists of slotted arrays on the circular waveguide with radially outward metallic disks and choke structures on these disks to improve the omnidirectionality and circular polarization performances. As the main novelty of the antenna design the structure is fed with only one rectangular waveguide, therefore the proposed antenna can be considered as a transceiver antenna. The design and simulations of the antenna and measurement results for 3-D-printed manufacturing are given at Ku-band. A 10 dB return loss bandwidth is found to be 500 MHz both for telemetry and telecommand bands having center frequencies of 12 and 14 GHz respectively. Besides the maximum axial ratio and minimum gain within 65° beamwidth are obtained as 3 dB and-5 dBi respectively which are sufficient for the omnidirectional and circularly polarized antenna providing TMTC communication in satellite systems. © 2021 Elsevier B.V. All rights reserved.
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    Conference Object
    Citation - WoS: 1
    Citation - Scopus: 1
    Different variations of amplitude spectrum based method for radar target recognition
    (IEEE, 2013) Mustafa Seçmen; Secmen, Mustafa
    This study develops a low decision time and highly accurate target recognition method by using wideband scattered signals from radar targets in resonance region. In the mentioned method estimation of signal parameters by rotational invariance techniques (ESPRIT) is used as main signal processing tool. Several reference ESPRIT vectors acquired by using amplitude based approach and are reduced to one vector for each target with averaging. These single vectors are used as feature vectors of the target set. The test phase is employed with highest correlation coefficients between amplitude vectors of test signals and feature vectors. The proposed method with two different variations is implemented to small-scale airplane targets modeled with wires. In addition to low runtime high recognition rates especially for the variation using real frequencies are found at low SNR levels. © 2013 IEEE. © 2014 Elsevier B.V. All rights reserved.
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    Article
    Citation - WoS: 24
    Citation - Scopus: 28
    The prototype of a wideband Ku-band conical corrugated horn antenna with 3-D printing technology
    (Advanced Electromagnetics, 2019) Mustafa Emre Carkaci; Mustafa Seçmen; Secmen, Mustafa; Carkaci, Mustafa Emre
    This study is about the design and production of a conical corrugated horn antenna used to feed reflector antennas in satellite communication (direct broadcast satellite-DBS) systems. The antenna designed with CST Microwave Studio program operates within wideband of 10.5-18.5 GHz at Ku-band. The prototype is realized with new generation 3D printing technology and conductive paint coating method which makes the antenna lightweight and provides low cost and faster production. According to measurement results the antenna has return loss almost better than 20 dB gain value of minimum 14.5 dBi and sidelobe level of-18 dB at most within 1.76:1 frequency bandwidth. Antenna is observed to have a gain loss of at most 1.5-2 dB within the band as compared to the same antenna with high conductivity metal which needs higher cost and production time for the manufacturing. © 2021 Elsevier B.V. All rights reserved.
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    Conference Object
    Citation - WoS: 1
    Electromagnetic Interference Shielding Effectiveness Performances of Screen Printing Ink and Expanded Graphite Based Composite at X and Ku Bands
    (IEEE, 2023) Zeynep Ertekin; Mustafa Secmen; Mustafa Erol; Erol, Mustafa; Ertekin, Zeynep; Secmen, Mustafa
    In this study electromagnetic shielding effectiveness and microwave properties (permittivity and permeability) of the expanded graphite (eGR) embedded in screen printing ink (SPI) were investigated. The experimentally measured scattering parameters were utilized within the Nicolson-Ross-Weir (NRW) algorithm to obtain the intrinsic properties at microwave frequencies. Then these parameters were fed into CST Microwave Studio to check the homogeneity behavior of the proposed sample. Initially a composite containing 7.9 wt% eGR was chosen and all the measurements in experimental setup (solely in waveguide environment) and CST simulations (waveguide and free-space) were performed for the proposed material. About 10 dB/mm shielding efficiency values were satisfied at X and Ku bands (8-18.4 GHz) and homogenous distribution was observed. Afterwards a superior composite containing higher eGR concentration was searched with a trade-off the thickness and the concentration/cost. At least 57 dB and at most 77 dB shielding effectiveness values were measured for a 2 mm thickness sample having 16 wt% eGR which results in more than 25 dB/mm shielding effectiveness at X and Ku bands.
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    Conference Object
    A Differential Evolution Algorithm for the Extraction of Complex Natural Resonance Frequencies of Electromagnetic Targets
    (SPRINGER-VERLAG BERLIN, 2011) Mustafa Secmen; M. Fatih Tasgetiren; Secmen, Mustafa; Tasgetiren, M. Fatih; DS Huang; Y Gan; V Bevilacqua; JC Figueroa
    This paper presents a differential evolution algorithm in order to find unique resonance frequencies of an electromagnetic target in the resonance scattering region. These frequencies are estimated from the roots of Laplace transform of a specially designed incident signal. The parameters of the signal are computed with an intelligent differential evolution (DE) algorithm. The algorithm searches for minimization of the scattered signal's energy in late-time region which is main fitness function in the algorithm. The proposed algorithm is demonstrated for a scattered signal of a dielectric sphere having several poles. The acquired pole results show very good agreement with theoretical expectations. Besides the differential evolution algorithm has higher accuracy as compared to a similar method which utilizes from genetic algorithm.
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    Conference Object
    Active impedance calculation in uniform microstrip patch antenna arrays with simulated data
    (2012) Mustafa Seçmen; Secmen, Mustafa
    This paper presents a simple active impedance evaluation of the antenna elements in uniform microstrip antenna arrays which includes additional impedance contributing from mutual coupling effects. The mutual coupling between antenna elements has been investigated in many studies which utilize from analytical or numerical methods such as method of moments. However these approaches can lead to significant increase in the mathematical complexity for the desired results when the number of elements in the array increases. For this purpose a simple technique for the extraction of active impedances of identical antenna elements in arrays is proposed which uses simulation data of reliable electromagnetic simulation program. In the method initially the self-impedance of an isolated element is evaluated, then this impedance is used initial data in the Newton-iteration approach for the calculation of active impedances of antenna elements in corporate-feed arrays. © 2012 IEEE. © 2012 Elsevier B.V. All rights reserved.
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    Master Thesis
    Parazitik elemanlar ile geliştirilmiş ± 45° çift polarize baz istasyonu anteni
    (2018) Kadağan, Orhan Murat; Seçmen, Mustafa
    Bu tez, çapraz polarizasyon ayrım (ÇPA) değerleri artırılmış bir ± 45° çift polarize baz istasyonu anteninin tasarımı ile ilgilidir. Toprak düzlem üzerinde birbirine dik konmuş iki kompakt kıvrımlı dipolden oluşan anten tasarımına dikey parazitik elemanlar eklenmiştir. CST Microwave Studio programı ile tasarlanan anten, GSM 1800/3G/LTE bantlarını kapsayacak şekilde 1.71-2.69 GHz frekans aralığında VSWR ≤ 2 değerlerine sahiptir. Azimut düzleminde (ϕ = 0°) bant boyunca 120° açı hüzmesinde (± 60°) en az 0 dBi kazancı bulunan antenin, 1.71-2.4 GHz frekans bandında ± 60° için parazitik elemanlar olmadan en az 2 dB olan ÇPA değerleri parazitik elemanlar ile 10 dB seviyelerine çıkarılmıştır. Antenin ilk tasarımı, toprak düzlem üzerinde birbirine dik iki yatay düz dipol anten şeklindedir. Bu anten, önce mikrostrip balun ile beslenmiştir, ancak ÇPA değerleri beklenen sonuçlara ulaşmadığından görüntü teorisi kullanılarak, dikey parazit elementler eklenmiştir. Daha sonra, meander dipol yapısı anteni küçültmek için uygulanmıştır. Son olarak, baz istasyonu uygulamalarına göre, anten frekansları 1.71 GHz ve 2.69 GHz'e optimize edilmiştir. Tasarlanan ve optimize edilen anten laboratuvar ortamında üretilmiş ve ölçülmüştür. Port 1 ve Port 2 için geri yansıma kayıpları 10 dB 'den fazladır ve portlar arası izolasyon değerleri 20 dB'den fazla ölçülmüştür. Ayrıca, maksimum kazanç değerleri band boyunca 3 ile 7 dB arasında ölçülmüştür. Son olarak antenin ÇPA değerleri band boyunca en az 10 dB ölçülmüştür.
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    Article
    Citation - WoS: 2
    Citation - Scopus: 2
    Utilizing resonant scattering signal characteristics via deep learning for improved classification of complex targets
    (Turkiye Klinikleri, 2021) Tugce Toprak; Alper Mustafa Selver; Mustafa Seçmen; E. Yesim Zoral; Toprak, Tugce; Zoral, E. Yesim; Yesim Zoral, E.; Alper Selver, M.; Selver, M. Alper; Secmen, Mustafa
    Object classification using late-time resonant scattering electromagnetic signals is a significant problem found in different areas of application. Due to their unique properties spherical objects play an essential role in this field both as a challenging target and a resource of analytical late-time resonant scattering electromagnetic signals. Although many studies focus on their detailed analysis the challenges associated with target classification by resonant late-time resonant scattering electromagnetic signals from multilayer spheres have not been investigated in detail. Moreover existing studies made the simplifying assumption that the objects having (one or more) layers constitute equal permeability values at the core and coatings. However especially for metamaterials magneto-dielectric inclusions require consideration of magnetic properties as well as dielectric ones. In this respect this study shows that the utilization late-time resonant scattering electromagnetic signals of magnetic spheres provide diverse information and features which result in superior object classification performance. For this purpose first time-domain late-time resonant scattering electromagnetic signals are generated numerically for single and multilayer radially symmetrical dielectric and magnetic spheres. Then by using emerging deep learning tools particularly convolutional neural networks trained with spheres having different material properties a high multilayer object classification performance is achieved. Furthermore by incorporating the frequency characteristics of the late-time resonant scattering electromagnetic signals to the classification process through Fourier transform and convolutional neural network layers for feature extraction a convolutional neural network with long short term memory algorithm is developed. The outcome of the proposed algorithm design is shown to be particularly successful even in the case of limited available data on challenging targets. This extended strategy is also shown to outperform modern data augmentation and transfer learning techniques in terms of accuracy as well as the computational cost. © 2021 Elsevier B.V. All rights reserved.
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    Article
    Citation - WoS: 3
    Citation - Scopus: 2
    A Parallel Connected Hybrid Microstrip-Substrate Integrated Waveguide Bandstop Filter
    (KAUNAS UNIV TECHNOLOGY, 2023) Kemal Guvenli; Sibel Yenikaya; Mustafa Secmen; Guvenli, Kemal; Yenikaya, Sibel; Secmen, Mustafa
    This study presents an original parallel connected hybrid microstrip-substrate integrated waveguide (PCHMSIW) bandstop filter. A low-pass filter implemented on a microstrip structure and a SIW-based high-pass filter are connected in parallel to each other. In this way the aim is to obtain a bandstop filter in the novel hybrid design. The parallel connected hybrid microstrip-substrate integrated waveguide (PCHM-SIW) bandstop filter is synthesised simulated and produced. The effects of connecting filters in parallel are discussed. It is seen from the results of CST Studio Suite simulation that PCHM-SIW bandstop filter has a bandwidth of 2.85 GHz and a center frequency of 4.26 GHz. The frequency change rate of the center frequency between simulation and measurement is 7.02 % where it is just 3.76 % for the deviation in bandwidth. The results of the simulation and those of the measurement are close to each other. These results converge to ideal analytical results.