2012/1
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Recent Submissions
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Time-of-Flight Based Calibration of an Ultrasonic Computed Tomography System
(Společnost pro radioelektronické inženýrství, 2012-04)The paper presents a novel method for calibration of measuring geometry and of individual signal delays of transducers in ultrasonic computed tomography (USCT) systems via computational processing of multiple time-of-flight ... -
Design of Compact Planar Diplexer Based on Novel Spiral-Based Resonators
(Společnost pro radioelektronické inženýrství, 2012-04)A miniaturized planar diplexer utilizing the novel spiral-based resonators is proposed. The given cell which is initially proposed in this article is composed of two separated rectangular spirals which are asymmetrical to ... -
Effects of Length and Diameter of Open-Ended Coaxial Sensor on its Reflection Coefficient
(Společnost pro radioelektronické inženýrství, 2012-04)This paper presents a calibration technique for a coaxial sensor using a transmission signal approach. The sensor was fabricated from commercially available RG402/U and RG405/U semi-rigid coaxial cable. The length of the ... -
Comments and Remarks over Classic Linear Loop-Gain Method for Oscillator Design and Analysis. New Proposed Method Based on NDF/RRT
(Společnost pro radioelektronické inženýrství, 2012-04)Present paper describes a new method for designing oscillators based on the Normalized Determinant Function (NDF) and Return Relations (RRT ). First a review of the loop-gain method will be performed, showing pros, cons ... -
Antenna Miniaturization Based on Supperscattering Effect
(Společnost pro radioelektronické inženýrství, 2012-04)Antennas are essential components of all existing radio equipments. The miniaturization of antenna is a key issue of antenna technology. Based on supperscattering effect, we found that when a small horn antenna is located ... -
Novel Compact and High Selectivity Dual-band BPF with Wide Stopband
(Společnost pro radioelektronické inženýrství, 2012-04)A novel type of compact and high selectivity dual-band bandpass filter (BPF) incorporating a dual-mode defected ground structure resonator (DDGSR) and a dual-mode open-stub loaded stepped impedance resonator (DOLSIR) is ... -
Comparison of Weighted Sum Fitness Functions for PSO Optimization of Wideband Medium-gain Antennas
(Společnost pro radioelektronické inženýrství, 2012-04)In recent years PSO (Particle Swarm Optimization) has been successfully applied in antenna design. It is well-known that the cost function has to be carefully chosen in accordance with the requirements in order to reach ... -
Implementation and Investigation of a Compact Circular Wide Slot UWB Antenna with Dual Notched Band Characteristics using Stepped Impedance Resonators
(Společnost pro radioelektronické inženýrství, 2012-04)A coplanar waveguide (CPW) fed ultra-wideband (UWB) antenna with dual notched band characteristics is presented in this paper. The circular wide slot and circular radiation patch are utilized to broaden the impedance ... -
Overview of Parallel Platforms for Common High Performance Computing
(Společnost pro radioelektronické inženýrství, 2012-04)The paper deals with various parallel platforms used for high performance computing in the signal processing domain. More precisely, the methods exploiting the multicores central processing units such as message passing ... -
Two-Dimensional Forward Scattering – Comparisons of Approximate and Exact Solutions
(Společnost pro radioelektronické inženýrství, 2012-04)Various methods for analyses of scattering are mentioned and new approximate relationships are derived. Experimental results for thin wire and several numerical simulations of forward scattering using approximate estimations, ... -
Clutter Reduction Based on Principal Component Analysis Technique for Hidden Objects Detection
(Společnost pro radioelektronické inženýrství, 2012-04)This paper brings a brief overview of the statistical method called Principal Component Analysis (PCA). It is used for clutter reduction in detection of hidden objects, targets hidden behind walls, buried landmines, etc. ... -
Application of Iterative Fourier Method in Cylindrical Phaseless Antenna Measurement Technique
(Společnost pro radioelektronické inženýrství, 2012-04)The Fourier iterative algorithm (FIA) is a well-known planar phase retrieval method. The algorithm uses conventional amplitude measurements on two surfaces placed in different distances from the measured antenna. In this ... -
Electromagnetic Band Gap Structures: Practical Tips and Advice for Antenna Engineers
(Společnost pro radioelektronické inženýrství, 2012-04)In this paper we discuss the use of electromagnetic band gap (EBG) structures in antenna engineering from a practical point of view. Our aim is to point out the most common mistakes and myths related to design, analysis ... -
Band-monitoring Payload for a CubeSat Satellite
(Společnost pro radioelektronické inženýrství, 2012-04)During changing sun activity, the ionosphere is responding accordingly and therefore it is interesting to observe the propagation behavior of shortwave bands. For the above mentioned purpose we have designed a band-monitoring ... -
Correction of Thermal Deviations of Fabry-Perot Resonator Based Measurements of Specific Gases in Millimeter Wave Bands
(Společnost pro radioelektronické inženýrství, 2012-04)Due to the thermal expansivity of the material used in the Fabry-Perot resonator mirrors, the resonator cavity length can change and this might therefore have an impact on the resonant frequency during high-resolution ... -
Testing QoE in Different 3D HDTV Technologies
(Společnost pro radioelektronické inženýrství, 2012-04)The three dimensional (3D) display technology has started flooding the consumer television market. There is a number of different systems available with different marketing strategies and different advertised advantages. ... -
Measurement of the Structure Constant of Refractivity at Optical Wavelengths Using a Scintillometer
(Společnost pro radioelektronické inženýrství, 2012-04)The structure constant of the atmospheric refractive index is used for characterizing the turbulence strength and for predicting the scintillation of electromagnetic waves in atmosphere. It is measured continuously in ... -
Immediate Analysis of Periodic Steady States in Switched DC-DC Converters via SPICE
(Společnost pro radioelektronické inženýrství, 2012-04)The method of immediate analysis of periodic steady states in switched DC-DC converters operating in the continuous current mode is described. The initial conditions, which correspond to the periodic steady state, are found ... -
Reliable and Efficient Procedure for Steady-State Analysis of Nonautonomous and Autonomous Systems
(Společnost pro radioelektronické inženýrství, 2012-04)The majority of contemporary design tools do not still contain steady-state algorithms, especially for the autonomous systems. This is mainly caused by insufficient accuracy of the algorithm for numerical integration, but ... -
In-system Jitter Measurement Based on Blind Oversampling Data Recovery
(Společnost pro radioelektronické inženýrství, 2012-04)The paper describes a novel method for simple estimation of jitter contained in a received digital signal. The main objective of our research was to enable a non-invasive measurement of data link properties during a regular ...
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