Procházení 2014/4 dle data publikování
Zobrazují se záznamy 1-20 z 33
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Fractal Metamaterial Absorber with Three-Order Oblique Cross Dipole Slot Structure and its Application for In-band RCS Reduction of Array Antennas
(Společnost pro radioelektronické inženýrství, 2014-12)To miniaturize the perfect metamaterial absorber, a fractal three-order oblique cross dipole slot structure is proposed and investigated in this paper. The fractal perfect metamaterial absorber (FPMA) consists of two ... -
High-Isolation Dual-Polarized Microstrip Antenna via Substrate Integrated Waveguide Technology
(Společnost pro radioelektronické inženýrství, 2014-12)A dual-polarized microstrip antenna with high-isolation is proposed by the utilization of the substrate-integrated waveguide (SIW) technology. According to the SIW technology, the metalized holes (MHs) are inserted into ... -
A Broadband UHF Tag Antenna For Near-Field and Far-Field RFID Communications
(Společnost pro radioelektronické inženýrství, 2014-12)The paper deals with the design of passive broadband tag antenna for Ultra-High Frequency (UHF) band. The antenna is intended for both near and far fields Radio Frequency Identification (RFID) applications. The meander ... -
Measurement and Calibration of A High-Sensitivity Microwave Power Sensor with An Attenuator
(Společnost pro radioelektronické inženýrství, 2014-12)In this paper, measurement and calibration of a high-sensitivity microwave power sensor through an attenuator is performed using direct comparison transfer technique. To provide reliable results, a mathematical model ... -
An Efficient Framework For Fast Computer Aided Design of Microwave Circuits Based on the Higher-Order 3D Finite-Element Method
(Společnost pro radioelektronické inženýrství, 2014-12)In this paper, an efficient computational framework for the full-wave design by optimization of complex microwave passive devices, such as antennas, filters, and multiplexers, is described. The framework consists of a ... -
A Novel FastICA Method for the Reference-based Contrast Functions
(Společnost pro radioelektronické inženýrství, 2014-12)This paper deals with the efficient optimization problem of Cumulant-based contrast criteria in the Blind Source Separation (BSS) framework, in which sources are retrieved by maximizing the Kurtosis contrast function. ... -
Excessive Memory Usage of the ELLPACK Sparse Matrix Storage Scheme throughout the Finite Element Computations
(Společnost pro radioelektronické inženýrství, 2014-12)Sparse matrices are occasionally encountered during solution of various problems by means of numerical methods, particularly the finite element method. ELLPACK sparse matrix storage scheme, one of the most widely used ... -
Optimizations of Patch Antenna Arrays Using Genetic Algorithms Supported by the Multilevel Fast Multipole Algorithm
(Společnost pro radioelektronické inženýrství, 2014-12)We present optimizations of patch antenna arrays using genetic algorithms and highly accurate full-wave solutions of the corresponding radiation problems with the multilevel fast multipole algorithm (MLFMA). Arrays of ... -
Inverse Problem Solution in Landmines Detection Based on Active Thermography
(Společnost pro radioelektronické inženýrství, 2014-12)Landmines still affect numerous territories in the whole world and pose a serious threat, mostly to civilians. Widely used non-metallic landmines are undetectable using metal detector. Therefore, there is an urging need ... -
First Order Sea Clutter Cross Section for HF Hybrid Sky-Surface Wave Radar
(Společnost pro radioelektronické inženýrství, 2014-12)This paper presents a modified method to simulate the first order sea clutter cross section for high frequency (HF) hybrid sky-surface wave radar, based on the existent model applied in the bistatic HF surface wave radar. ... -
On Amplify-and-Forward Relaying Over Hyper-Rayleigh Fading Channels
(Společnost pro radioelektronické inženýrství, 2014-12)Relayed transmission holds promise for the next generation of wireless communication systems due to the performance gains it can provide over non-cooperative systems. Recently hyper-Rayleigh fading, which represents fading ... -
3D Capturing with Monoscopic Camera
(Společnost pro radioelektronické inženýrství, 2014-12)This article presents a new concept of using the auto-focus function of the monoscopic camera sensor to estimate depth map information, which avoids not only using auxiliary equipment or human interaction, but also the ... -
SIM-DSP: A DSP-Enhanced CAD Platform for Signal Integrity Macromodeling and Simulation
(Společnost pro radioelektronické inženýrství, 2014-12)Macromodeling-Simulation process for signal integrity verifications has become necessary for the high speed circuit system design. This paper aims to introduce a “VLSI Signal Integrity Macromodeling and Simulation via ... -
Modelling and Measuring Dielectric Constants for Very Thin Materials Using a Coaxial Probe
(Společnost pro radioelektronické inženýrství, 2014-12)This paper is focused on the non-destructive measurement of the dielectric constants (relative permittivities) of thin dielectric material (0.1 mm – 0.5 mm) using an open-ended coaxial probe with an outer diameter of 4.1 ... -
A Versatile Active Block: DXCCCII and Tunable Applications
(Společnost pro radioelektronické inženýrství, 2014-12)The study describes dual-X controlled current conveyor (DXCCCII) as a versatile active block and its application to inductance simulators for testing. Moreover, the high pass filter application using with DXCCCII based ... -
An Improved Split-Step Wavelet Transform Method for Anomalous Radio Wave Propagation Modelling
(Společnost pro radioelektronické inženýrství, 2014-12)Anomalous tropospheric propagation caused by ducting phenomenon is a major problem in wireless communication. Thus, it is important to study the behavior of radio wave propagation in tropospheric ducts. The Parabolic Wave ... -
Low Voltage Floating Gate MOS Transistor Based Four-Quadrant Multiplier
(Společnost pro radioelektronické inženýrství, 2014-12)This paper presents a four-quadrant multiplier based on square-law characteristic of floating gate MOSFET (FGMOS) in saturation region. The proposed circuit uses square-difference identity and the differential voltage ... -
A Coplanar Waveguide Fed Hexagonal Shape Ultra Wide Band Antenna with WiMAX and WLAN Band Rejection
(Společnost pro radioelektronické inženýrství, 2014-12)In this paper, a coplanar waveguide (CPW) fed hexagonal shape planar antenna has been considered for ultra-wide band (UWB). This antenna is then modified to obtain dual band rejection. The Wireless Local Area Network (WLAN) ... -
A CPW-fed Triple-band Antenna for WLAN and WiMAX Applications
(Společnost pro radioelektronické inženýrství, 2014-12)In this letter, a compact printed antenna fed by coplanar waveguide for triple-band is presented. The proposed antenna consists of two rectangular metallic loops in front and a slit square ring on the backside. Tri-band ... -
A novel Multi-permittivity Cylindrical Dielectric Resonator Antenna for Wideband Applications
(Společnost pro radioelektronické inženýrství, 2014-12)In this paper, a novel multi-permittivity cylindrical dielectric resonator antenna for wideband application is presented. The multi-permittivity cylinder is formed by combining two different permittivity material sectors ...