Yayınlar
Koleksiyondaki öğeler
- MakaleAçık Erişim2024THE EFFECT OF THE PERCEPTION OF ORGANIZATIONAL SUPPORT AND WORK-FAMILY CONFLICT ON THE JOB PERFORMANCE OF FEMALE EMPLOYEES: A MEDIATED MODEL
Kizil, Seda
The purpose of this study is to reveal the relationship between the perception of organizational support, job performance and work-family conflict for female employees. For this purpose, data were collected via a survey technique from 176 female employees working at Bayburt University. The obtained data were analyzed using SPSS and AMOS statistical package programs. The findings of the study which used the structural equation model indicate that the perception of organizational support negatively and significantly affects work-family conflict and positively and significantly affects work performance; It has been revealed that work- family conflict negatively and significantly affects work performance. In addition, the study also concluded that work-family conflict plays a full mediating role in the relationship between the perception of organizational support and job performance. In other words, the perception of organizational support was found to lead to an increase in job performance by reducing work- family conflict (mediating variable).
AtıfWoS1OpenAlex1
İncele - MakaleYalnız künye2026Scopus SJRQ2Analyzing IPO Performance on Borsa Istanbul: A Hybrid Econometric and Machine Learning Framework (2013-2025)
Ayberkin, Doruk
This study examines the determinants of the performance of initial public offerings (IPOs) conducted by 237 firms across 38 sectors on the Istanbul Stock Exchange between 2013 and 2025, using a hybrid analytical framework. To analyze the impact of sector characteristics, firm-level financial indicators, supply structure, and market timing on the returns of USD-denominated IPOs, this study combines heteroskedasticity-resistant ordinary least squares (OLS) regression with tree-based ensemble machine learning algorithms (random forest, XGBoost) and benchmark models (support vector regression, artificial neural network). The distributional characteristics of returns from IPOs highlight the use of nonlinear modelling techniques characterized by high positive skewness (5.12) and excess kurtosis (45.24). Our findings reveal significant sectoral heterogeneity. According to the findings, the Financial Services and Fisheries sectors showed statistically significant superior performance, while the Metal Mining, Insurance, and Construction sectors underperformed. Transportation and Storage exhibited the highest point estimate but did not reach conventional significance levels. The XGBoost machine learning model, with an R 2 of 0.869 and a mean absolute error (MAE) of 17.87, achieved superior single-split prediction accuracy compared to the OLS method, which yielded an R 2 of 0.220. However, cross-validation analyses indicated that all models exhibited limited out-of-sample generalizability (best CV R 2 = 0.04). The Diebold-Mariano test, conducted to compare prediction performance, confirmed that the artificial neural network (ANN) model provided a statistically significant improvement over the OLS method (DM = 2.121, p = 0.034). The SHAP value analysis used in the models reveals how each feature affects the final predictions, the relative importance of each feature, and the model's dependence on feature interactions. It identifies the IPO price (USD), the USD/TRY exchange rate, and the size of the supply as the most effective estimators with economically significant nonlinear interactions. The study aims to demonstrate the comparative advantages and limitations of ensemble learning under abnormal financial data conditions by presenting detailed sectoral evidence across 38 sectors. In this way, it aims to contribute to the IPO literature in emerging market economies by offering viable policy recommendations for investors, issuers, and regulators in Turkish capital markets.
- MakaleYalnız künye2019The Relationship between Hand/Arm and Leg Strengths with Hand/Foot Reaction Time
Ucan, Izzet
The aim of this study is to determine whether there is a relationship between hand/arm and leg flexion and extension strengths of elite athletes as well as back and general leg strengths and reaction times. From various branches, 29 healthy elite male athletes between 18-25 years old participated in the study. Flexion and extension strengths in hand/arm and leg, back and general leg strengths were measured with Lafayette Manuel muscle test device, while back and general leg strengths were measured with TAKKEI (brand) dynamometer, and reaction times were measured with the device developed by Agirbas et. al. (2019). The relationship between the values of the athletes was examined with Bivarite - Pearson Corelattion test. The results were interpreted at the significance level of .05. Statistically, significant relationships were determined between right-hand extension strengths and right-hand visual reaction times of the athletes while sitting, between left-hand flexion strengths and left-hand auditory reaction times while sitting, and between general leg strengths and all reaction times. In the study, it was concluded that flexion and extension strengths do not affect reaction time but there is a negative-sided strong relationship between general leg strengths considered as the resultant Strengths and all the leg reaction times.
- MakaleYalnız künye2011Scopus SJRQ3The Effects of Nepotism and Favoritism on Employee Behaviors and Human Research Management Practices: A Research on Turkish Public Banks
Büte, Mustafa
The aim of this study is to analyze the effects of nepotism on employees' behaviors and human resources management practices in Turkish public banks. The data were collected via survey from the public banks operating in Ankara. Out of a total of 300 questionnaire forms distributed, 243 were used for analyses. Research model and hypothesizes that were designed via literature scanning, as a part of the objectives of the research, were subjected to Path Analysis using LISREL 8.54 statistical package program. The survey method was used for collecting data. The results of the research revealed that nepotism had significant negative effects on intention to quit, job satisfaction, organizational commitment and human resource management practices. Besides, human resource management practices were found to have positive significant effects on job satisfaction and organizational commitment.
AtıfWoS5İncele - BildiriYalnız künye2013EXPLORING THE EVOLUTION OF GEOMETRICAL THINKING
Karadag, Zekeriya
Geometry situated artefacts is a great resource to have learners experience geometry. This study explores how pre-service teachers go through this experience and how they benefit by connecting real life geometry to their learning geometry trajectory. Moreover, the study documents how participant pre-service teachers develop understanding of basic transformational geometry. The results suggest that participants may also have learned how to encourage their prospective students.
- MakaleAçık Erişim2025Scopus SJRQ3Erzurum Central Cortan Mosque and 2020-2021 Restoration
Çelik, Bayram; Gültepe, Gulten
The city of Erzurum has always maintained its feature of being one of the most important cities of the region in terms of military, trade and culture and art throughout history. Being geographically at the junction of important civilizations and being at the transition point of these civilizations has not only preserved this feature but also caused its cultural and artistic richness to be very diverse and of high standards. The city, which was the gateway to Anatolia for the Turks, was also the city where the first Turkish architectural works were built. Structures such as the Ulu Mosque, the Twin Minarets and the Yakutiye Madrasahs not only raised the building standards of the architectural tradition in this city to a very high level, but also became a reference for later structures in terms of building standards. The high building standards that began with the Saltukids and Ilkhanids gained new momentum in the 16th century. After this transformation, very large foundations were established in the city and intensive construction activities began. Many valuable structures were added to the city in the construction activities that continued uninterruptedly until the Republic period. One of these is the & Ccedil;ortan Mosque, which is thought to have been built in the 1850s. The mosque with wooden pillars and wooden beams is a structure that greatly reflects the architectural tradition of Erzurum and the characteristics of the period in which it was built. With this study, both the cultural and artistic characteristics of the structure will be determined and brought to the literature, and the restoration conveyed in detail.
AtıfWoS1İncele - MakaleAçık Erişim2026Primary School Teachers' Perceptions of Artificial Intelligence and Their Opinions on Artificial Intelligence Applications in Life Science Courses
Ari, Sinan
In this study, in which the perceptions of artificial intelligence of primary school teachers and the use of artificial intelligence in the life science course were examined, explanatory sequential design, one of the mixed research methods, was used. While 318 primary school teachers took part in the quantitative dimension of the study, 15 primary school teachers took part in the qualitative dimension. Artificial intelligence perception scale was used in the quantitative dimension of the study, and a semistructured interview form prepared by the researcher was used in the qualitative dimension. At the end of the study, it was determined that the perceptions of primary school teachers about artificial intelligence were generally positive, according to the graduation status variable, the teaching and learning perceptions of postgraduate teachers about artificial intelligence were higher, there was a significant difference in favor of women according to the gender variable, and in terms of seniority variable, the perceptions of teachers with 1-5 years of experience about artificial intelligence were higher. It has been revealed that primary school teachers can use artificial intelligence applications in all learning areas in the curriculum and that they use these applications mostly to create studentcentered and interactive learning environments. At the end of the research, postgraduate and in-service trainings on artificial intelligence were recommended for primary school teachers.
- BildiriAçık Erişim2014Evaluation of Prospective Teachers and Practice Classroom Teachers Opinions of problems Encountered in Practice Schools (Bayburt University sample)
Öksüz, Yucel; Çevik, Ceren
In this study, prospective teachers' and practice classroom teachers' opinions on the problems encountered during the schoolteaching practice class in the practice schools have been examined. The study has been conducted with 125 senior prospective teachers at B. U. Education Faculty, Primary Education, Primary School Teaching Department, and 21 practice classroom teachers that work at practice schools. The present study is case study, one of the qualitative researches. The data about the opinions of the prospective teachers and the practice classroom teachers were collected through the 'Interview form' developed by the researchers, and 'Practice Teacher Proficiency Scale' that was developed by Kiraz (2003) in order to find out the prospective teachers' views regarding the practice classroom teachers. Besides, 18 students who were willing have been interviewed. The data obtained out of the interview forms were analyzed with the help of descriptive statistics; the data obtained out of the interviews were analyzed with the help of qualitative data analysis techniques; and the data gathered out of the scale were analyzed with the help of SPSS 18.0 statistics packet. In line with the findings, some suggestions towards the classroom teaching education and the applications in primary schools have been presented. (C) 2013 The Authors. Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Academic World Education and Research Center.
AtıfWoS1OpenAlex4İncele - MakaleAçık Erişim2020Optimising High Lime Fly Ash Content By Means of Silica Fume Incorporation to Control Alkali-Silica Reaction And Drying Shrinkage of Mortars
Gökçe, H. Suleyman; Hosseinnezhad, Hojjat; Üzüm, Onur; Hatungimana, Daniel; Ramyar, Kambiz
In this study, the effect of binary and ternary cementitious systems composed of portland cement, high-lime fly ash and silica fume on the compressive strength, alkali-silica reaction (ASTM C 1567) and drying shrinkage of mortar mixtures was researched. For this purpose, binary and ternary binders were prepared with partial replacement of cement with either fly ash (15wt% and 30wt%) or silica fume (5wt%) or both mineral admixtures (15wt+%5wt% and 30wt%+5wt%). An alkali reactive basalt aggregate was used in this study. It was found that partial replacement of cement with high-lime fly ash reduced the strength of mortar mixtures even up to 28-days. Besides, addition of 5% silica fume had not a significant effect on the early strength of fly ash-bearing mixtures. However, silica fume inclusion improved the 28-day strength of mixtures. In terms of alkali-silica reaction (ASR), the fly ash with lower lime content reduced the 14-day expansion more than that of fly ash with higher lime content. The opposite results were the case in 28-day ASR expansions. The ASR expansions of the fly ash-bearing mixtures were significantly reduced by the introduction of the additional 5% silica fume to these mixtures. However, silica fume incorporation remarkably increased the drying shrinkage values of the mixtures. Finally, fly ash with higher lime content was found to be more satisfactory in terms of compressive strength, alkali-silica reaction and drying shrinkage in the ternary binder system.
AtıfOpenAlex1İncele - MakaleAçık Erişim2020A Folklore Study on Traditional Grape Molasses Production in Silifke Uzuncaburc
Kabak, Turgay
Uzuncaburc, which is connected to the Silifke district of Mersin, is an old settlement that goes back to the previous periods of BCE. At the time when the Turks started to settle in Anatolia, the main sources of livelihood were agriculture and animal husbandry in Uzuncaburc, where nomadic Turkmen settled. Local people who feed animals such as goat and sheep have grown wheat, barley and chickpeas as agricultural products. However, these are not the only agricultural products grown by the people of the region. There is also a viticulture outside. There is a large amount of vineyards, especially in the center and around the settlement. In this context, there is almost no family in the region. The main reason why viticulture is so widespread is that Uzuncaburc has a deep-rooted culture of viticulture, whose origins go back to the previous periods of the Turks. The aim of this article is to determine the traditional molasses production methods in the region and to investigate the cultural dimension of this production. In this study, molasses production and ethnographic tools used during this production and oral culture products that were produced were determined and examined in terms of tradition by field research method. As a result of this study, it was determined that the people of Uzuncaburc continued the tradition of viticulture they took over from the previous inhabitants of the region.
AtıfOpenAlex1İncele - MakaleAçık Erişim2021Effect of tarragon addition on volatile compound profile and some quality paramaters of sucuk
Kamiloglu, Aybike; Elbir, Tugba; Topçu, Kubra Cinar
The goal of the present study was to investigate the effect of tarragon and ripening period on certain quality parameters and the volatile profile of sucuk (Turkish dry fermented sausage). Tarragon was used in sucuk samples at three distinct levels (0.25%, 0.50% and 0.75%), and tarragon-free samples were used as control. Analyses were performed on the 0., 3., 5., 7., 9. and 13. days of ripening time. Although the presence of tarragon did not affect L* and b* values, the pH, a* (P<0.01), aw (P<0.05), and TBARS values of the sucuk samples were statistically affected. Tarragon demonstrated antioxidant activity in sucuk in accordance with 90 % +/- 0.3 DPPH scavenging activity. When the volatile profile was evaluated, the key component affected by the addition of tarragon was determined as Anisole, p-allyl-. As a result, while an antioxidative effect was detected during ripening in the presence of tarragon in sausage, undesirable changes were not observed on some quality characteristics such as pH and a(w).
- MakaleAçık Erişim2021Views on the Usage of Social Media Tools in School-Family Communication
Kaban, Abdullatif
This study, it was aimed to reveal the views of parents and teachers about the usage of social media tools in school-family communication. In this study, which was carried out with the phenomenological method, which is one of the qualitative research methods, the data were collected using a semi-structured interview form. As a result of the content analysis conducted on the data obtained, it was concluded that social media tools, especially WhatsApp, are widely used in school-family communication. It has been found that the advantages of these tools are free, fast, and easy to use, and they prevent waste of time and workload by sending mass messages. The disadvantages were determined to be used out of purpose and timeless, causing misunderstanding and violation of privacy. Participants suggested that while using these tools, they should not deviate from their purpose, some restrictions in terms of time and content should be introduced and their use should be expanded. The results obtained are expected to contribute significantly to the studies to be done to increase family participation in education and the practices to be developed in this sense.
AtıfWoS11OpenAlex15İncele - MakaleAçık Erişim2022The Dynamics Affecting the Export-Import Ratio in Turkey: A Hybrid Model Proposal with Econometrics and Machine Learning Approach
Özden, Erdemalp
The indicators related to foreign trade are conventionally measured in a currency or as the ratio of the country's gross domestic products. The ratio of exports to imports, alternatively, provides more useful results when comparing the foreign trade performance of economies both over time and with other countries as a unit-free indicator. In this study, the macroeconomics and financial determinants affecting this ratio are examined both econometrically and using the machine learning method. In this context, the autoregressive distributed lag model method was first used to investigate the relationship between normalized gross domestic products, exchange rate, consumer price index, producer price index, crude oil and Turkey's ratio of exports to imports rate between 2010-2021, monthly. Long-term analysis showed that the 1% depreciation of the Turkish Liras against the US dollar increased the ratio of exports to imports rate by 0.7 points. In addition, a 1% increase in consumer price index will increase ratio of exports to imports by 1.9 points, while a 1% increase in producer price index will cause a -0.8 point decrease on the ratio of exports to imports. Then, the pattern between the variables was analyzed with quadratic support vector machine, a machine learning method. Finally, the novel ARDL-SVM hybrid method was developed, and the pattern between the variables was examined. The findings revealed that although the econometric method provided a broader scope for interpreting the relationships between variables, the developed ARDL-SVM method successfully captured patterns between variables.
AtıfWoS1OpenAlex5TR Dizin1İncele - MakaleYalnız künye2024FROM BYTES TO JOBS: DECODING BOSNIA AND HERZEGOVINA'S EMPLOYMENT PUZZLE THROUGH FDI AND ICT
Arí, Yilmaz Onur; Izgí, Fatma
Bosnia and Herzegovina's transition from socialism to capitalism has led to fundamental changes in the country's economic structure, with unemployment, FDI, economic growth, and information technologies becoming critical factors in this process. Information and Communication Technology (ICT) and Foreign Direct Investment (FDI) can promote economic growth and generate employment, helping to tackle unemployment through various channels. Bosnia and Herzegovina has been facing long-term unemployment for years. Thus, this study uses an Autoregressive Distributed Lag (ARDL) bounds testing approach and structural break technique to explore the impact of FDI, ICT, and growth on unemployment in Bosnia and Herzegovina for the period 1997-2022. The research findings indicate that FDI has a negative impact on unemployment in the long run. On the other hand, ICT has a positive impact on unemployment in the long run. Moreover, empirical findings demonstrated that there is a negative and significant relationship between growth and unemployment in the long run. This implies the validity of Okun's Law for Bosnia and Herzegovina. Furthermore, the study brings forth a crucial insight that the impacts of FDI on unemployment are not uniform and differ significantly based on the type of FDI inflows.
- MakaleAçık Erişim2013DETERMINATION OF PHYSICAL PROPERTIES OF LAMINATED COMPOSITE BEAM VIA THE INVERSE VIBRATION PROBLEM METHOD
Balci, Murat; Gündogdu, Omer
In this study, some physical properties of a laminated composite beam were estimated by using the inverse vibration problem method. Laminated composite plate was modeled and simulated to obtain vibration responses for different length-to-thickness ratios in ANSYS. A numerical model of the laminated composite beam with unknown parameters was also developed using a two-dimensional finite element model by utilizing the Euler-Bernoulli beam theory. Then, these two models were embedded into the optimization program to form the objective function to be minimized using genetic algorithms. After minimizing the squared difference of the natural frequencies from these two models, the unknown parameters of the laminated composite beam were found. It is observed in this study that the Euler-Bernoulli beam theory suppositions approximated the real results with a rate of %0.026 error as the thickness of the beam got thinner. The estimated values were finally compared with the expected values and a very good correspondence was observed.
AtıfWoS3OpenAlex8İncele - MakaleAçık Erişim2018Scopus SJRQ1Thermodynamic and thermoeconomic analyses of an organic Rankine cycle adapted gas turbine cycle using S-CO2
Tozlu, Alperen; Özahi, Emrah; Abusoglu, Aysegul
In this study, a model of an organic Rankine cycle (ORC) adapted gas turbine cycle using supercritical CO2 (S-CO2) as working fluid is performed. Thermodynamic analyses of system are carried out using Aspen Plus and EES programs. As a result of the thermodynamic analyses, electricity production capacity, energy and exergy efficiencies of proposed system are evaluated as 1530.88 kW, 23.30 % and 59.60 %, respectively. For the thermoeconomic analysis of the system, specific exergy costing method, SPECO, is applied as widely used one among the second law based methods. Unit exergetic cost of electricity production for 1 kWh is found to be 7.28 cent and the total cost of electricity production for 1530.88 kWh is found to be 114.43 $. The annual return from the system of the ORC adapted gas turbine cycle using S-CO(2)which has total investment cost of 3,033,300 $ is evaluated as 741,146 $ taking into account the difference between the cost of electricity production and sale price of electricity. As a result of the thermoeconomic analysis, the payback period of system is found to be 4.09 years.
AtıfWoS7OpenAlex2TR Dizin3İncele - MakaleAçık Erişim2021NEW METHODS AND PRACTICES IN THE EMPLOYMENT AND EDUCATION OF RELIGIOUS OFFICIALS IN GERMANY
Sözen, Hasan; Gencel Sözen, Hayriye
The subject of this study is the new methods and practices adopted in the employment and education of religious officials in Germany. Accordingly, the aim of the study is to identify the search for new methods in the employment and education of religious officials in Germany and to reveal their possibilities and limits. The study is bounded by the employment and education of religious officials in Germany. The searches for employment and education of religious officials in other countries falls outside the study area of this paper. In this study document analysis method was used to collect data. Relsted documents were read using the inductive method, accordingly coding was done and themes were created. In the research, case study design, one of the qualitative research desings and survey model were preferred. In this context, it has been tried to obtain data from as many different sources as possible about the employment and education of religious officials in Germany. The obtained data were analysed by descriptive analysis method. The data were organised, defined and explained according to the themes in accordance with the sub problems. The findings are limited to the data obtained from the sources that the researchers could identify and access on the subject and to the comments made accordingly. As a result of the research, it has been determined that most of the religious officials in Germany come from abroad, especially from Turkey, and a significant part of them work in mosques and associations affiliated to DITIB. It has been observed that the education and employment of the staff to be employed in the religious services in Germany is under the duty and responsibility of the religious communities, and this situation is guaranteed in accordance with the relevant articles of the Basic Law for the Federal Republic of Germany. It has been determined that some religious communities have many years of practice and experience in the employment and education of religious officials. However, these educations are neither institutional nor systematic. Increasing political pressures have forced Islamic umbrella organizations to cooperate with official institutions and organizations in the employment and education of religious officials. Accordingly, while some religious communities are a part of the process in question, some are cautious about the demands of the German state. It has been determined that the German state can not directly determine the content of the theology programs, nor can it regulate qualifications and competencies that the religious officials should have and the conditions of the religious officials. For this reason, the authorities, on the one hand, develop recommendations on the training of religious officials at the academic level. On the other hand, they strive for the acceptance of these proposals by the Islamic organisations. Another result of the research is that the criticisms against the current employment and education of religious officials are grouped under three main headings. These are the continuation of the relations of the religious officials with the source countries and actors and being under their influence, the foreignness felt to the interlocutors and the understanding of religion one has. According to these criticisms, religious officials consider the interests and expectations of foreign countries/governments rather than those of Muslims in Germany, do not know the German language, culture and social structure, and generally have a conservative and anti-democratic religion and world view in relation to the countries and geographies they come from. In Germany, religious officials are not only those who carry out traditional religious services in mosques, but they are olsa understood as persons that serve many functional purposes like social, cultural, scientific, sports, etc. aims. It is only possible for religious officials to fulfill these duties and responsibilities expected of them if they have certain qualifications and competencies. At this point, common qualifications, competencies, duties and responsibilities that religious officials should have should be determined, and education programs should be developed in line with these qualifications, competencies, duties and responsibilities. In this context, it can be suggested that religious officials fulfill various duties and have features in the context of religious services both inside and outside the mosque. Religious officials in Germany should contribute to the adaptation of Muslims to Germany as much as they should contribute to the preservation of the Muslim identity of the Muslims here. It is inevitable for these religious officials to take an active role in inter-religious/intercultural dialogue studies. Religious officials are also expected to establish healthy relations with German local governments. As an extension of this, accompanying various ceremonies and celebrations and doing youth work are among the duties and responsibilities expected from religious officials. In order to be able to do all these, the precondition is that they are competent on the German language, culture and social structure. In addition, they must have the knowledge and skills to provide traditional religious services.
AtıfOpenAlex1TR Dizin1İncele - MakaleAçık Erişim2024Digital Writing in Foreign Language Teaching: Learner Views
Güven, Ahmet Zeki; Yilmaz Karaca, Meryem; Banaz, Emrullah
The present study explores Turkish learners' approaches toward digital writing and how digital writing contributes to their language learning. For this purpose, we recruited 21 international students from 16 countries, 10 males and 11 females, who attended B2C1 -level Turkish language classes at the Akdeniz University Turkish Language Teaching Center in the 2021-2022 academic year. We recorded and transcribed the data collected through face-to-face interviews with a semi -structured interview form consisting of 6 questions. The data were then coded to generate themes, and the findings were grounded on the interpretation of these themes. Accordingly, the results uncovered that all participants engage in digital writing and mostly utilize WhatsApp, Instagram, Telegram, YouTube, and Twitter as digital writing platforms. Moreover, they were found to usually mind proper spelling and punctuation and tend to use the T9 typing system in digital writing in Turkish. We also discovered that participants find auto -correction useful and sometimes misspell vowels, consonants, and longer words/consecutive suffixes due to differences between spoken and written languages. They particularly thought that digital writing contribute to their learning of Turkish. Overall, we comprehensively discussed the findings and raised some recommendations for future research.
AtıfWoS2OpenAlex1İncele - MakaleAçık Erişim2024GREEN MANAGEMENT AND GREEN TECHNOLOGY IN ORGANIZATIONS: A BIBLIOMETRIC RESEARCH
Durmus, Ibrahim; Akyüz, Ahmet Mutlu
Green approaches, whose importance is constantly increasing for organizations and society, can be evaluated within the framework of management and technological developments. It is aimed to reveal the results regarding the intensity of green management and green technology studies in organizations, keywords emphasized by the authors, relationship strength of the words, trending times, and thematic maps. This study aims to evaluate green management and green technology research in organizations with the help of literature. The research consisted of green management and green technology research in the organizations included in the WoS database. A bibliometric analysis method was applied. The scope of the research consisted of 341 studies. The keywords most emphasized by the authors in the research are sustainability, innovation, supply chain management, sustainable development, management, environmental management, greening, green, information management, supply chain, performance, environmental, industry, corporate social responsibility, green production, sustainable, technology, and environmental sustainability concepts.
AtıfWoS1OpenAlex2İncele - MakaleAçık Erişim2025Two-and four-way Wilkinson power divider design with slow-wave microstrip structures
Çakir, Mehmet; Karpuz, Ceyhun
In this study, conventional Wilkinson power dividers have been modified with meandered transmission line structures, resulting in two-port power dividers with either two or three serial connections and four-port power dividers with two serial connections. A substrate with a relative permittivity of 10.2 and a height of 1.27 mm, RT/Duroid, was used for the designs, and frequency responses were optimized using an electromagnetic simulation program. To enhance isolation and bandwidth, 100-ohm resistors were placed at each connection point in the power dividers. In the two-port configuration with two serial connections, the average return loss was-14.45 dB, insertion loss was-3.40 dB, and isolation was-13.25 dB over the 0.17-1.36 GHz band. Additionally, in the 2.24-2.97 GHz frequency band, the return loss was-15.45 dB, insertion loss was-3.50 dB, and isolation was-15.93 dB. In the three-port configuration with three serial connections, the average return loss was-14.73 dB, insertion loss was-3.38 dB, and isolation was-12.20 dB over the 0.11-1.05 GHz range;-15.21 dB return loss,-3.54 dB insertion loss, and-15.34 dB isolation over the 1.36-2.10 GHz range; and-17.52 dB return loss,-3.65 dB insertion loss, and-14.03 dB isolation over the 2.59-3.14 GHz range. In the four-port configuration with two serial connections, the average return loss was-20.65 dB, insertion loss was-6.17 dB, and isolation was-16.74 dB in the 0.47-1.17 GHz range. The designed circuits were fabricated, and it was observed that the simulation results were consistent with the measurement results.
AtıfWoS1TR Dizin1İncele
