Yazar "Türkmen, Mustafa" seçeneğine göre listele

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    Öğe
    Comparative Analysis of the Effects of the Substrate Material and Deltoid Shaped Slots on Patch Antennas for 5G Networks at 37 GHz and 39 GHz
    (2020) Hakanoğlu, Barış Gürcan; Koç, Burak; Hayber, Şekip Esat; Yalduz, Hüsnü; Türkmen, Mustafa
    In this study two rectangular patch antennas with deltoid shaped slots are proposed. It is aimed to show the effects of the slots for different frequencies and different dielectrics. The antennas are designed for 37 GHz and 39 GHz which are among the projected 5G frequencies in millimeter wave bands. For the designs RT5880 and RO3003 dielectric substrates are selected for each antenna to obtain the effects of the materials. At different operating frequencies and different substrate materials, the deltoid shaped slots result in different amounts of improvements in return loss levels. The antenna with the slots designed with RT5880 has a return loss reduction of 18.81 dB for 37 GHz and 16.37 dB for 39 GHz which means a progress in S11 levels of 44.47% for 37 GHz and 36.14% for 39 GHz. The antenna with the slots designed with RO3003 has a return loss reduction of 25.17 dB for 37 GHz and 27.54 dB for 39 GHz which means a progress in S11 levels of 58.44% for 37 GHz and 78.80% for 39 GHz. The results can give a good insight for antenna designers how the antennas react to same modifications at different frequencies for different substrate materials in millimeter wave bands.
  • [ X ]
    Öğe
    Design and analysis of quad-band grid array microstrip antenna at UWB and ISM channel frequencies for WBAN operations
    (Institute of Electrical and Electronics Engineers Inc., 2018) Türkmen, Mustafa; Yalduz, Hüseyin
    In this paper, we present design and simulation of a compact grid array microstrip patch antenna. In the design of antenna a RT/duroid 5880 substrate having relative permittivity, thickness and loss tangent of 2.2, 1.57 mm and 0.0009 respectively, has been used. The simulated antenna performance was obtained by Computer Simulation Technology Microwave Studio (CST MWS). The antenna performance was investigated by analyzing its return loss (S11), radiation pattern, voltage standing wave ratio (VSWR) parameters. The simulated S11 parameter has shown that antenna operates for Industrial, Scientific and Medical (ISM) band and Wireless Body Area Network (WBAN) applications at 2.45 GHZ ISM, 6.25 GHZ, 8.25 GHZ and 10.45 GHZ ultra-wideband (UWB) four resonance frequencies with bandwidth > 500MHz (S11 <; -10dB). The antenna directivity increased towards higher frequencies. The VSWR of resonance frequency bands is also achieved succesfully less than 2. It has been observed that the simulation result values of the antenna are suitable for WBAN applications.