2011/1
Browse by
Recent Submissions
-
Four-Phase Oscillators Employing Two Active Elements
(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 ... -
Deriving (MO)(I)CCCII Based Second-order Sinusoidal Oscillators with Non-interactive Tuning Laws using State Variable Method
(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 ... -
Arbitrary Shape Electromagnetic Transparent Device Based on Laplace’s Equation
(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 ... -
Voltage-Controlled Floating Resistor Using DDCC
(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
(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
(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
(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
(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. ... -
Insertion Loss Estimation of EMI Filters in Unmatched Input/Output Impedance System
(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
(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
(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. ... -
Coaxial Filters Optimization Using Tuning Space Mapping in CST Studio
(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 ... -
Novel Designed CSRRs and Its Application in Tunable Tri-Band Bandpass Filter Based on Fractal Geometry
(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 ... -
Planar Millimeter-Wave Antennas: A Comparative Study
(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 ... -
Current-Mode CCII+ Based Oscillator Circuits using a Conventional and a Modified Wien-Bridge with All Capacitors Grounded
(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 ... -
Topology Reduction for Approximate Symbolic Analysis
(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
(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 ... -
Elliptic and Hyperbolic Dielectric Lens Antennas in mm-Waves
(Společnost pro radioelektronické inženýrství, 2011-04)Dielectric lenses can substantially improve antenna parameters, especially the planarity of radiated waves and the antenna gain. The paper deals with their application in millimeter-wave band. The main goal concerns the ... -
Computer Simulation of Nonuniform MTLs via Implicit Wendroff and State-Variable Methods
(Společnost pro radioelektronické inženýrství, 2011-04)The paper deals with techniques for a computer simulation of nonuniform multiconductor transmission lines (MTLs) based on the implicit Wendroff and the statevariable methods. The techniques fall into a class of finitedifference ... -
Electrical and optical study of transparent V-based oxide semiconductors prepared by magnetron sputtering under different conditions
(Společnost pro radioelektronické inženýrství, 2011-04)This work is focused on structural, optical and electrical behaviors of vanadium-based oxide thin films prepared by magnetron sputtering under different conditions. Thin films have been deposited on glass substrates from ...
RSS 1.0