Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/11

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End date: 2009Publisher: search.filters.publisher.John Wiley and Sons Inc.

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  • Article
    Citation - WoS: 12
    Citation - Scopus: 16
    The Resonant Behavior of the Fibonacci Fractal Tree Antennas
    (John Wiley and Sons Inc., 2008) Özbakış, Başak; Kuştepeli, Alp
    An investigation of a novel fractal tree antenna with the application to two different geometries is presented. The antenna is designed by using the special Fibonacci number sequence which leads to nonuniform branch length ratios to form the fractal tree. This new approach gives better performance, especially in the miniaturization of the antenna, when compared with the conventional designs. The results obtained from the experiments are also compared with the computed ones and there is a very good agreement between the numerical and measured data.
  • Article
    Citation - WoS: 2
    Citation - Scopus: 1
    Design of Coupling Structures for Groove Guide Resonators
    (John Wiley and Sons Inc., 2008) Bechteler, Thomas F.; Kuştepeli, Alp; Aydınlık Bechteler, Ayşe Sevinç
    Three different coupling structures for a groove guide resonator operating at 10 GHz are investigated. First, propagatable modes are determined analytically. Then, the efficiency of the coupling structures is investigated by means of the method of moments and measurements. Finally, a groove guide resonator is designed and the resonance spectrum for each coupling structure is computed numerically, applying the finite-difference time-domain method. Numerical results are compared with experimental measurements. There is good agreement between the measured and simulated data.
  • Article
    Citation - WoS: 3
    Citation - Scopus: 3
    Switchless Bidirectional Amplifier for Wireless Communication Systems
    (John Wiley and Sons Inc., 2007) Aydınlık Bechteler, Ayşe Sevinç; Bechteler, Thomas F.
    A bidirectional amplifier working at 2.4 GHz is presented in this article. The presented amplifier is able to amplify two signals simultaneously. This, since commonly used radio frequency switches are replaced by circulators. The amplifier is designed on a single small-sized printed circuit board. First, the new amplifier circuit is proposed and characterized. Then, its advantages and design problems are analyzed. Finally, design instructions are setup in order to obtain a good performance of the switchless amplifier within the frequency band of interest.