Recent Submissions

  • Four-Phase Oscillators Employing Two Active Elements 

    Biolková, Viera; Bajer, J.; Biolek, Dalibor (Společnost pro radioelektronické inženýrství, 2011-04)
    Two novel four-phase voltage-output oscillators are proposed. These circuits can also be utilized as quadrature oscillators with floating outputs. Each oscillator employs two DO-CIBA (Differential Output- Current Inverter ...
  • Novel Designed CSRRs and Its Application in Tunable Tri-Band Bandpass Filter Based on Fractal Geometry 

    He-Xiu Xu; Guang-Ming Wang; Jian-Gang Liang (Společnost pro radioelektronické inženýrství, 2011-04)
    In this paper, we propose and research a novel miniaturized composite right/left handed transmission line (CRLH TL) cell based on revised complementary split ring resonators (CSRRs) for the first time. Novel CRLH TL cell ...
  • Coaxial Filters Optimization Using Tuning Space Mapping in CST Studio 

    Wolansky, D.; Tkadlec, R. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper deals with the optimization of coaxial filters using Tuning Space Mapping (TSM) method implemented to CST environment. The function of fine and coarse model and their link between each other is explained. In ...
  • Voltage-Controlled Floating Resistor Using DDCC 

    Kumngern, M.; Torteanchai, U.; Dejhan, K. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper presents a new simple configuration to realize the voltage-controlled floating resistor, which is suitable for integrated circuit implementation. The proposed resistor is composed of three main components: MOS ...
  • Current Gain Controlled CCTA and its Application in Quadrature Oscillator and Direct Frequency Modulator 

    Sotner, R.; Jerabek, J.; Prokop, R.; Vrba, K. (Společnost pro radioelektronické inženýrství, 2011-04)
    A modified conception of adjustable current conveyor transconductance amplifier (CCTA) and its interesting application in simple quadrature oscillator expandable for direct frequency modulation purposes, employing only ...
  • Reduction of Sidelobes by Nonuniform Elements Spacing of a Spherical Antenna Array 

    Rupcic, S.; Mandric, V.; Zagar, D. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper presents a significant sidelobe reduction if nonuniform elevational spacing of antenna elements on the sphere is used. Antenna elements are progressively phased with a uniform amplitude excitation. The calculation ...
  • Switched Capacitor Realizations of Fractional-Order Differentiators and Integrators Based on an Operator with Improved Performance 

    Varshney, P.; Gupta, M.; Visweswaran, G. S. (Společnost pro radioelektronické inženýrství, 2011-04)
    In this paper, switched capacitor realizations of discretized models of half differentiator and half integrator based on a new operator with improved performance have been proposed. This Al-Hsue operator is the weighted ...
  • Electronically Controllable Grounded Capacitor Current-Mode Quadrature Oscillator using single MO-CCCDTA 

    Prasad, D.; Bhaskar, D. R.; Singh, A. K. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper presents an electronically controllable grounded capacitor quadrature oscillator using single multiple-output current controlled current differencing transconductance amplifier (MO-CCCDTA) as an active element. ...
  • Arbitrary Shape Electromagnetic Transparent Device Based on Laplace’s Equation 

    Jing-jing Yang; Ming Huang; Cheng-fu Yang; Ji-hong Shi (Společnost pro radioelektronické inženýrství, 2011-04)
    Transparent device is deliberately-designed electromagnetic structure that is transparent to electromagnetic wave. It can be used as a radome structure which is capable of protection antenna inside without sacrificing its ...
  • Insertion Loss Estimation of EMI Filters in Unmatched Input/Output Impedance System 

    Drinovsky, J.; Kejik, Z.; Ruzek, V.; Zachar, J.; Svacina, J. (Společnost pro radioelektronické inženýrství, 2011-04)
    One of the problems in the design of powerline EMI filters is the uncertainty and ambiguity of their source/load impedances which results in breach of expected filter parameters in a real installation. The paper presents ...
  • A New Low-Power CMOS Quadrature VCO with Current Reused Structure 

    Wang, C.; Peng, G.; Ma, M.; Li, Z. (Společnost pro radioelektronické inženýrství, 2011-04)
    A new quadrature voltage controlled oscillator (QVCO) circuit topology is proposed for low-voltage and low-power applications. In the proposed circuit, two oscillators with current-reused structure are coupled to each other ...
  • Mutual Coupling Between IFF/SSR Microstrip Antennas with Reduced Transversal Size - Experimental Study 

    Sorokosz, L.; Zieniutycz, W.; M. Pergol, M.; Mazur, W. (Společnost pro radioelektronické inženýrství, 2011-04)
    Mutual coupling between IFF/SSR microstrip antennas is investigated experimentally in this paper. At the begining configuration and performance of isolated microstrip antenna fed by H-shaped coupling slot is presented. ...
  • Deriving (MO)(I)CCCII Based Second-order Sinusoidal Oscillators with Non-interactive Tuning Laws using State Variable Method 

    Lahiri, A. (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper discusses systematic realization of second-order sinusoidal oscillators using multiple-output second-generation current controlled conveyor (MO-CCCII) and/or its inverting equivalent, namely the multiple-output ...
  • Planar Millimeter-Wave Antennas: A Comparative Study 

    Pítra, Kamil; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper describes the design and the experimental verification of three types of wideband antennas. Attention is turned to the bow-tie antenna, the Vivaldi antenna and the spiral antenna designed for the operation at ...
  • Topology Reduction for Approximate Symbolic Analysis 

    Kolka, Zdeněk; Vlk, Martin; Horák, Martin (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper deals with a procedure for approximate symbolic analysis of linear circuits based on simplifying the circuit model. The procedure consists of two main steps. First, network elements whose influence on the circuit ...
  • Behavioral Modeling of Memcapacitor 

    Biolek, Dalibor; Biolek, Zdeněk; Biolková, Viera (Společnost pro radioelektronické inženýrství, 2011-04)
    Two behavioral models of memcapacitor are developed and implemented in SPICE-compatible simulators. Both models are related to the charge-controlled memcapacitor, the capacitance of which is controlled by the amount of ...
  • Current-Mode CCII+ Based Oscillator Circuits using a Conventional and a Modified Wien-Bridge with All Capacitors Grounded 

    Bajer, J.; Lahiri, A.; Biolek, Dalibor (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper deals with a pair of current-mode sine-wave oscillator circuits. Both these circuits are implemented using positive second-generation current conveyors (CCII+). The principle of the first oscillator is based on ...
  • Modern Microelectronic Technologies in Fabrication of RFID Tags 

    Dziedzic, A.; Slobodzian, P. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper presents fabrication of RFID tags, especially antennas for HF band (13.56 MHz), on cheap flexible substrates. The physicochemical, geometrical, DC and AC electrical properties as well as long-term stability ...
  • Microwave Impedance Measurement for Nanoelectronics 

    Randus, M.; Hoffmann, K. (Společnost pro radioelektronické inženýrství, 2011-04)
    The rapid progress in nanoelectronics showed an urgent need for microwave measurement of impedances extremely different from the 50Ω reference impedance of measurement instruments. In commonly used methods input impedance ...
  • Development in Electronic Packaging – Moving to 3D System Configuration 

    Szendiuch, I. (Společnost pro radioelektronické inženýrství, 2011-04)
    The electronic industry is reducing package dimensions of components as well as complete electronics systems. Surface mount device passives and semiconductor chips have to be mounted together bringing a functional system ...

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