Çalışkan, Fatma

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Caliskan,F.
F.,Çalışkan
F.,Caliskan
Çalışkan,F.
Fatma, Caliskan
Caliskan, Fatma
Çalışkan, Fatma
Fatma, Çalışkan
C., Fatma
F., Caliskan
C.,Fatma
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Doktor Öğretim Üyesi
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Scholarly Output

3

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Citation Count

5

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2015 - 20163
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Now showing 1 - 3 of 3
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    Microstrip antennas for WiMAX applications;
    (Institute of Electrical and Electronics Engineers Inc., 2015) Çalışkan, Fatma; Aydın, Elif; Aydin,E.; Department of Electrical & Electronics Engineering
    In this paper, four different antenna types have been designed to be used for WiMAX applications. These antennas have been designed using HFSS simulation software. This paper has included the return loss and the radiation pattern of the designed antennas. Using the simulation results, it is shown that these four antennas are working on Wi-Fi and WiMAX frequency ranges. © 2015 IEEE.
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    Citation Count: 4
    Comparison of computer-based propagation models with experimental data collected in an urban area at 1800 MHz
    (Institute of Electrical and Electronics Engineers Inc., 2015) Çalışkan, Fatma; Aydın, Elif; Aydin,E.; Department of Electrical & Electronics Engineering
    Nowadays a lot of models are set for the efficient and economic usage of frequency band since the band is a limited source. Therefore, the propagation models created for this purpose were studied in the literature. These models are Free Space Path Loss (Fspl) + Reflection plus Multiple Diffraction (RMD), COST-Hata and COST-WI models. In order to compare the success of the models, electric field strength measurements were taken in a chosen district (Mustafa Kemal Mahallesi - Ankara, Turkey) where an irregular structure style can be observed. First set of measurements were recorded at random coordinates and second set of measurements were collected by the following coordinates tracking on a single line. As a conclusion, measured values were compared with the results which were taken from the mentioned models with graphical presentations. The most appropriate model was tried to be found and as another aim of the study, a correction factor was generated as a modification for COST-Hata propagation model. © 2015 IEEE.
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    Citation Count: 1
    Numerical and experimental analysis of transverse electromagnetic cell
    (Wiley, 2016) Çalışkan, Fatma; Demirel, Gulsima; Caliskan, Fatma; Department of Electrical & Electronics Engineering
    A transverse electromagnetic (TEM) Cell is able to generate accurate electromagnetic waves from 0 Hz to several MHz. Using this device, Electromagnetic Interference/Compatibility (EMI/EMC) tests of small RF devices can be performed in a regular laboratory environment. Before invention of the TEM Cell, an anechoic chamber environment was needed to perform EMI/EMC tests. However, this approach is costly and restrictive. Using a TEM Cell, it is much less expensive and time consuming. During this study, open and close models of TEM Cells were designed. One of the models was manufactured and tested. Simulation and measurement results were compared with observe the challenges of the study. (c) 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:373-378, 2016.