Now showing items 1-15 of 15

    • Classification of multichannel ECoG related to individual finger movements with redundant spatial projections 

      Onaran I.; Ince, N.F.; Cetin, A.E. (2011)
      We tackle the problem of classifying multichannel electrocorticogram (ECoG) related to individual finger movements for a brain machine interface (BMI). For this particular aim we applied a recently developed hierarchical ...
    • Design and implementation of capacitive micromachined ultrasonic transducers for high power 

      Yamaner F.Y.; Olcum, S.; Bozkurt, A.; Köymen H.; Atalar, Abdullah (2011)
      Capacitive micromachined ultrasonic transducers (CMUTs) have a strong potential to compete piezoelectric transducers in high power applications. In a CMUT, obtaining high port pressure competes with high particle velocity: ...
    • The design of a wideband and widebeam piston transducer in a finite closed circular baffle 

      Sahin, Z.; Koymen H. (2008)
      The design of a high power piezoelectric underwater transducer operating at frequency range 40 kHz-80 kHz with acoustic power capability in excess of 250W is described. The transducer consists of two back-toback elements. ...
    • Design of multi-octave band GaN-HEMT power amplifier 

      Eren G.; Sen O.A.; Bolukbas, B.; Kurt G.; Arican O.; Cengiz O.; Unal, S.T.K.; Durmus, Y.; Ozbay, E. (2012)
      This paper describes design, fabrication and measurement of 6 GHz - 18 GHz monolithic microwave integrated circuit (MMIC) amplifier. The amplifier is realized as coplanar waveguide (CPW) circuit using 0.3 μm-gate Gallium-Nitride ...
    • Detection of gamma responses in EEG signals 

      Tüfekçi, D.I.; Karakaş, S.; Arikan, O. (2006)
      In the detection of the existence of the early gamma response, subjective methods have been used. In this study, an automated gamma detection technique is developed based on the features obtained from the time - frequency ...
    • Dual-frequency division de-multiplexer based on cascaded photonic crystal waveguides 

      Akosman, A. E.; Mutlu, M.; Kurt, H.; Ozbay, E. (Elsevier, 2012-02-28)
      A dual-frequency division de-multiplexing mechanism is demonstrated using cascaded photonic crystal waveguides with unequal waveguide widths. The de-multiplexing mechanism is based on the frequency shift of the waveguide ...
    • High power K-band GaN on SiC CPW monolithic power amplifier 

      Cengiz O.; Sen O.; Ozbay, E. (Institute of Electrical and Electronics Engineers Inc., 2014)
      This paper presents a high power amplifier at K-band (20.2-21.2 GHz). The AlGaN/GaN CPW MMIC amplifier is realized with 0.25 μm HEMT process on 2-inch semi-insulating SiC substrate. The amplifier has a small signal gain ...
    • Interference analysis of fixed terrestrial microwave LOS/NLOS radio links 

      Goktas P.; Topcu, S.; Karasan, E.; Altintas, A. (Institute of Electrical and Electronics Engineers Inc., 2015)
      In this study, interference modelling is investigated for fixed terrestrial microwave LOS (line-of-sight)/ NLOS (transhorizon) radio links operating in NATO Band 3+ (1350-2690 MHz) and NATO Band 4 (4400-5000 MHz) frequency ...
    • Light-controlled microwave whispering-gallery-mode quasi-optical resonators at 50W LED array illumination 

      Yurchenko V.B.; Ciydem, M.; Altintas, A. (American Institute of Physics Inc., 2015)
      We present experimental observations of light-controlled resonance effects in microwave whispering-gallery-mode quasi-optical dielectric-semiconductor disk resonators in the frequency band of 5 GHz to 20 GHz arising due ...
    • Metamaterial Absorber Based Multifunctional Sensor Application 

      Ozer Z.; Mamedov A.M.; Ozbay, E. (Institute of Physics Publishing, 2017)
      In this study metamaterial based (MA) absorber sensor, integrated with an X-band waveguide, is numerically and experimentally suggested for important application including pressure, density sensing and marble type detecting ...
    • Millimeter-wave scale metamaterials 

      Alici, K.B.; Ozbay, E. (2009)
      We review two metamaterial configurations, which are operating at the millimeter-wave scale, in terms of design, fabrication, and characterization. We observed both numerically and experimentally at around 100 GHz a narrow ...
    • Theoretical limits on time delay estimation for ultra-wideband cognitive radios 

      Gezici, S.; Celebi H.; Arslan H.; Poor H.V. (2008)
      In this paper, theoretical limits on time delay estimation are studied for ultra-wideband (UWB) cognitive radio systems. For a generic UWB spectrum with dispersed bands, the Cramer-Rao lower bound (CRLB) is derived for ...
    • Three dimensional microfabricated broadband patch and multifunction reconfigurable antennae for 60 GHz applications 

      Hunerli H.V.; Mopidevi H.; Cagatay, E.; Imbert, M.; Romeu J.; Jofre L.; Cetiner, B.A.; Biyikli, N. (Institute of Electrical and Electronics Engineers Inc., 2015)
      In this paper we present two antenna designs capable of covering the IEEE 802.11ad (WiGig) frequency band (57-66 GHz and 59-66 GHz respectively). The work below reports the design, microfabrication and characterization of ...
    • A triple-band antenna array for next-generation wireless and satellite-based applications 

      Razzaqi, A. A.; Khawaja, B. A.; Ramzan M.; Zafar, M. J.; Nasir, S. A.; Mustaqim, M.; Tarar, M. A.; Tauqeer, T. (Cambridge University Press, 2016)
      In this paper, a triple-band 1 × 2 and 1 × 4 microstrip patch antenna array for next-generation wireless and satellite-based applications are presented. The targeted frequency bands are 3.6, 5.2 and 6.7 GHz, respectively. ...
    • A two-level temporal fair scheduler for multi-cell wireless networks 

      Shahsavari, S.; Akar, N. (Department of Electrical and Electronics Engineers, 2015)
      We propose a two-level scheduler for a frequency reuse-1 multi-cell wireless network satisfying inter-and intra-cell weighted temporal fairness constraints. As opposed to hard partitioning of the entire frequency band to ...