Now showing items 1-20 of 137

    • Nemlineáris áramkörszimuláció személyi számítógépen 

      Székely, Vladimir; Fábry G; Fiser J; Laczik Zs; Poppe, András (1987)
      A cikk egy népszerű személyi számítógéptípusra készített nemlineáris áramkörszimulációs programot mutat be. Bőséges ábraanyagával azt igyekszik érzékeltetni, hogy miképp aknázhatók ki a személyi számítógépek nyújtotta ...
    • Minimum Sensitivity Calibration for Reflectometers 

      Ladvánszky, János; Hilt, Attila (1992-10-07)
      Sensitivities of the error-corrected reflection coefficient (rc) with respect to the rc's of the calibrating elements are minimized. A minimum can be found if the rc's of the calibrating elements form a regular triangle ...
    • High-Frequency Electro-Optical Model for MESFETs 

      Baranyi, András; Berceli, Tibor; Hilt, Attila; Ladvánszky, János (1993)
    • Modelling Electro-Optical Interaction in MESFETs 

      Berceli, Tibor; Baranyi, András; Hilt, Attila; Ladvánszky, János (1993-07-01)
      A modelling procedure is presented for MESFETs with both electrical and optical inputs. First a physical model is introduced for the illuminated MESFET. The actual circuit model with electrical and optical variables is ...
    • Reduction of Measurement Error in Microwave Reflectometers by Minimum Sensitivity Calibration 

      Ladvánszky, János; Hilt, Attila; Csonka, István (1993-07-08)
      Explicit formulas for the sensitivities of the error corrected reflection coefficient (RC) with respect to the RCs of the calibrating elements, and the invariance of their sum are presented. Under the condition that the ...
    • Mikrohullámú digitális rádióberendezések mérése a 23 és a 26 GHz-es frekvenciasávban 

      Hilt, Attila; Györösi, Julianna; Farkasvölgyi, János; Csonka, István (1993-08-01)
      Magyarországon a 23 és a 26 GHz-es mikrohullámú digitális rddióberendezések jelentősége növekszik, az alacsonyabb frekvenciasávok (15 GHz, 18 GHz) telítettsége miatt. Relatív olcsó áron és gyorsan bővíthető velük a szűkös ...
    • Mikrohullámú reflexiómérés hibájának csökkentése minimális érzékenységű kalibráció alkalmazásával 

      Ladvánszky, János; Hilt, Attila; Csonka, István (1993-08-09)
      Explicit kifejezést adunk a hibakorrekció utáni reflexiós tényezőnek a kalibráló elemek reflexiós tényezőire vontakozó érzékenységeire és megmutatjuk összefüggésük invarianciáját. Az érzékenységek összegének állandósága ...
    • Harmonic-Balance Analysis of Optically Injection Locked Microwave FET Oscillators 

      Berceli, Tibor; Rizzoli, Vittorio; Neri, Andrea; Baranyi, András; Hilt, Attila; Ladvánszky, János (1993-09-06)
      The paper discusses the application of harmonic-balance (HB) techniques to the analysis of optical injection locking of microwave FET oscillators. HB methods are first extended to cover the case of a circuit excited by a ...
    • Dynamic Properties of Optically Controlled FET Amplifiers 

      Berceli, Tibor; Cabon, Beatrice; Hilt, Attila; Ho Quoc, Anh; Pic, Étienne; Tedjini, Smail (1994-11-23)
      The transmission of FET amplifiers can be controlled by a laser light illuminating the device. Due to the illumination the gain of the amplifíer is increased significantly. In this paper the dynamic properties of the gain ...
    • On Minimum Sensitivity Reflectometers 

      Ladvánszky, János; Hilt, Attila; Zoller, Vilmos; Csonka, István (1995)
      The equation f(x, x1, x2, x3)=f(y, y1, y2, y3) is considered that characterizes the relation between the measured reflection coefficient x, the calibrating reflection coefficients x1, x2, x3 and the corresponding values ...
    • Dynamic Characterization of Optical-Microwave Transducers 

      Berceli, Tibor; Cabon, Beatrice; Hilt, Attila; Ho Quoc, Anh; Pic, Étienne; Tedjini, Smail (1995-05-16)
      Optical-microwave transducers based on FET devices are investigated to determine their dynamic characteristics. It is observed that the result of the well known frequency response method differs from that of a combined ...
    • Transmission and Distortion of an Optical-Microwave Modulation Transducer 

      Baranyi, András; Hilt, Attila (1995-08-31)
      The optical-microwave modulation transducer is a circuit transforming the intensity modulation of a lightwave to the modulation of a microwave carrier. In this paper using the linear parametric model of the transducer ...
    • Performance of Future Event Set Implementations 

      Lencse, Gábor (1996)
      Seven data structures were examined with simulation and compared to find out which one should be used to implement the Future Event Set of an event driven discrete event simulator. The number of key comparisons and pointer ...
    • Dynamic Characterization of Optically Controlled Semiconductor Devices 

      Berceli, Tibor; Cabon, Béatrice; Hilt, Attila; Járó, Gábor; Ladvánszky, János (1996-03-25)
      Optical control of semiconductor devices is a new area, which can be used in several applications. The dynamic behavior of these devices is a crucial problem. Reliable method for its characterization is highly needed. The ...
    • Hybrid Integration of Laser Diode Chips on a Glass Substrate 

      Cabon, Béatrice; Hilt, Attila; Vilcot, Anne; Czotscher, Konrad; Weisser, Stefan; Berceli, Tibor (1996-06-05)
      An important task in optoelectronics is to realize optoelectronic transceivers in which a laser diode chip is hybrid integrated with an an optical integrated circuit (OIC). In the paper, hybrid integration of Multi-Quantum ...
    • Improved Optical-Microwave Mixing Process Utilizing High-Speed Photo-diodes 

      Berceli, Tibor; Cabon, Béatrice; Hilt, Attila; Járó, Gábor (1996-09-09)
      Mixing of lightwaves and microwaves offers new perspectives for the reception of subcarrier multiplexed (SCM) optical signals, Berceli (1). The received signal can be selected more easily and thus the receiver is significantly ...
    • Wideband Distributed Amplifier Using Encapsulated HEMTs 

      Zólomy, Attila; Járó, Gábor; Hilt, Attila; Baranyi, András; Ladvánszky, János (1996-10-05)
      A two stage microwave hybrid integrated distributed amplifier with a gain of 7 ± 1 dB and a noise figure better than 5.2 dB in the 0.2–11 GHz band and better than 3 dB in the 7.5–11 GHz subband is reported. The amplifier ...
    • Microwave Distributed Amplifier in Hybrid Integrated Technology 

      Zólomy, Attila; Hilt, Attila; Baranyi, András; Járó, Gábor (1997)
      In the paper the gain-bandwidth relations of microwave distributed amplifiers are analyzed. It is shown that in case of proper realization corresponding to distributed amplifier (DA) requirements the amplifier gain and ...
    • Gain and Noise Optimization of an Optical Receiver Utilizing a Distributed Amplifier 

      Járó, Gábor; Berceli, Tibor; Hilt, Attila; Zólomy, Attila (1997)
      In wideband optical communications the bandwidth and the noise of optical receivers are crucial problems. The application of a distributed amplifier instead of a transimpedance amplifier in an optical receiver has the ...
    • A Millimeter Wave PLL Oscillator for Optical Receivers 

      Udvary, Eszter; Zólomy, Attila Imre; Hilt, Attila; Járó, Gábor; Mihály Sándor; Berceli, Tibor (1997)
      The design and experimental investigations of a harmonic microwave oscillator is presented. The transistor oscillator was designed to operate at the fundamental frequency with high third harmonic output. The final goal is ...