Ústav radioelektroniky
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Fractionalorder chaotic memory with wideband constant phase elements
(MDPI, 20200409)This paper provides readers with three partial results that are mutually connected. Firstly, the gallery of the socalled constant phase elements (CPE) dedicated for the wideband applications is presented. CPEs are calculated ... 
Illuminance Sensing in Agriculture Applications Based on InfraRed ShortRange Compact Transmitter Using 0.35um CMOS Active Device
(IEEE, 20200129)This paper introduces a novel electronic system for simplex lowbitrate infrared (IR) communication applications. The transmitter is implemented completely by analog building blocks, formed with the help of a recently ... 
Research of the Operator's Advisory System Based on Fuzzy Logic for Pelletizing Equipment
(MDPI, 20191112)Fertilizer manufacturing in the chemical industry is closely related with agricultural production. More than a half of raw materials for food products are grown by fertilizing plants. The demand of fertilizers has been ... 
Electronically Adjustable Emulator of the FractionalOrder Capacitor
(Kaunas University of Technology, 20191212)This paper presents a design of the controllable emulator of the FOC (FractionalOrder Capacitor) and its application. The circuit is based on 5thorder RC topology (type Foster I) where the passive elements in the topology ... 
FractionalOrder Phase Shifters with Constant Magnitude Frequency Responses
(Kaunas University of Technology, 20191010)This contribution presents and experimentally analyzes the idea how to reach the constant magnitude as well as the phase response in the fractionalorder (FO) phase when shifting twoports. The straightforward method ... 
Novel Reconnectionless Reconfigurable Filter Design Based on Unknown Nodal Voltages Method and Its FractionalOrder Counterpart
(Kaunas University of Technology, 20190626)A novel solution of reconnectionless electronically reconfigurable filter is introduced in the paper. The filter is designed based on unknown nodal voltages method (MUNV) using operational transconductance amplifiers ... 
FractionalOrder Asymptotical Phase Shifter With Flat Magnitude Response
(IEEE, 20190626)This work deals with design of fractionalorder asymptotical phase shifter having constant magnitude response within almost three decades (100 Hz – 100 kHz) and frequency dependent phase difference going from 0 to 45 ... 
Analogue Implementation of a FractionalOrder PI^{\lambda} Controller for DC Motor Speed Control
(IEEE, 20190612)In this paper, an approach to design a fractionalorder integral operator s(lambda) where 1 < lambda <0, using an analogue technique, is presented. The integrator with a constant phase angle 80.1 degree (i.e. order lambda ... 
Accurate constant phase elements dedicated for audio signal processing
(MDPI, 20191115)This review paper introduces realvalued twoterminal fully passive RC ladder structures of the socalled constant phase elements (CPE). These lumped electronic circuits can be understood as twoterminal elements described ... 
Hamilton’s principle for circuits with dissipative elements
(Hindawi, 20191028)The classic form of Hamilton’s variational principle does not hold for circuits with dissipative elements. It is shown in the paper that this may not be true in the case of systems consisting of the socalled higherorder ... 
Analog Implementation of FractionalOrder Elements and Their Applications
(20190624)With advancements in the theory of fractional calculus and also with widespread engineering application of fractionalorder systems, analog implementation of fractionalorder integrators and differentiators have received ... 
Analog Implementation of FractionalOrder Elements and Their Applications
(20190624)With advancements in the theory of fractional calculus and also with widespread engineering application of fractionalorder systems, analog implementation of fractionalorder integrators and differentiators have received ... 
60GHz MillimeterWave Propagation Inside Bus: Measurement, Modeling, Simulation, and Performance Analysis
(IEEE, 20190624)Millimeterwave (mmWave) transmission over the unlicensed 60GHz spectrum is a potential solution to realize highspeed internet access, even inside mass transit vehicles. The solution involves communication between users ... 
Lagrangian for circuits with higherorder elements
(MDPI, 20191029)The necessary and sufficient conditions of the validity of Hamilton’s variational principle for circuits consisting of (alpha,beta) elements from Chua’s periodical table are derived. It is shown that the principle holds ... 
Wideband UHF and SHF longrange channel characterization
(Springer Open, 20190723)This paper presents an outdoor longrange (from 315 m up to 5.3 km) fixed channel campaign for both ultra high frequency and super high frequency bands with copolarized horizontal and vertical antenna configurations. It ... 
New nonlinear active element dedicated to modeling chaotic dynamics with complex polynomial vector fields
(MDPI, 20190906)This paper describes evolution of new active element that is able to significantly simplify the design process of lumped chaotic oscillator, especially if the concept of analog computer or state space description is adopted. ... 
Design of FractionalOrder Integrator Controlled by Single Voltage Gain
(IEEE, 20190701)This work presents analyses of interaction of fractional and integerorder transfer functions when their responses are added together by simple linear operation of sum. The mathematical background is very complex but ... 
Comparative Study of OpAmpbased Integrators Suitable for FractionalOrder Controller Design
(IEEE, 20190701)In this paper, a fractionalorder capacitor (FOC) of an order = 0.89 (i.e. constant phase angle –80.1 degree) was emulated via Valsa RC network with five branches. The network component values were optimized using modified ... 
Synthesis and Optimization of FractionalOrder Elements Using a Genetic Algorithm
(IEEE, 20190614)This study proposes a new approach for the optimization of phase and magnitude responses of fractionalorder capacitive and inductive elements based on the mixed integerorder genetic algorithm (GA), over a bandwidth of ... 
Millimeter Wave Vehicular Channel Emulation: A Framework for Balancing Complexity and Accuracy
(MDPI, 20181116)We propose a general framework for the specification of a sparse representation of millimeter wave vehicular propagation channels and apply this to both synthetic data and realworld observations from channel sounding ...