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Pulsed Electromagnetic Field Transmission through a Small Rectangular Aperture: A Solution Based on the Cagniard-DeHoop Method of Moments
(MDPI, 2022-06-20)Pulsed electromagnetic (EM) field transmission through a relatively small rectangular aperture is analyzed with the aid of the Cagniard-deHoop method of moments (CdH-MoM). The classic EM scattering problem is formulated ... -
Chaotic and hyperchaotic dynamics of a Clapp oscillator
(MDPI, 2022-05-30)This paper describes recent findings achieved during a numerical investigation of the circuit known as the Clapp oscillator. By considering the generalized bipolar transistor as an active element and after applying the ... -
Pressure and humidity detector based on textile integrated waveguide
(Sciendo, 2022-01-31)In the paper, a pressure sensor and a humidity sensor are designed as supplementary components of a textile integrated waveguide (TIW) based on an artificial magnetic conductor (AMC) consisting of hexagonal elements. Thanks ... -
Chaotic oscillations in cascoded and Darlington-type amplifier having generalized transistors
(MDPI, 2022-02-08)This paper describes, based on both numerical and experimental bases, the evolution of chaotic and, in some cases, hyperchaotic attractors within mathematical models of two two-port analog functional blocks commonly used ... -
Anisotropic Conductivity of Rat Head Phantom and its Influence on Electroencephalogram Source Localization
(IEEE, 2022-01-20)In this paper we deal with a simplified anisotropic rat head phantom development and the investigation of the influence of the anisotropic white matter on electroencephalogram source localization. The proposed phantom is ... -
SIW-Based Circularly Polarized Antenna Array for 60 GHz 5G Band: Feasibility Study
(MDPI, 2022-04-12)At present, most millimeter wave 5G systems operate at frequencies ranging from 24 GHz to 39 GHz. Nevertheless, the new 5G release is going to increase the supported 5G spectrum into the 60 GHz band. In this communication, ... -
Slot Antennas Integrated into 3D Knitted Fabrics: 5.8 GHz and 24 GHz ISM Bands
(MDPI, 2022-04-01)In the paper, a 3D knitted fabric is used for the design of a circularly polarized textile-integrated antenna. The role of the radiating element is played by a circular slot etched into the conductive top wall of a ... -
Use of 3D Printing for Horn Antenna Manufacturing
(MDPI, 2022-05-11)This article describes the manufacturing of a horn antenna using a 3D commercial printer. The horn antenna was chosen for its simplicity and practical versatility. The standardised horn antenna is one of the most widely ... -
Tunable fully-differential filter employing MOTA and DACA elements
(NISCAIR-CSIR, 2016-09-19)A new fully-differential (F-D) filtering structure of the 2nd-order current-mode universal filter is described in this paper. Presented filter is also proposed in a single-ended (S-E) form in order to compare behavior of ... -
Modeling of the generic memcapacitors using higher-order multi-ports
(Elsevier, 2022-05-14)The paper introduces predictive modeling of generic memcapacitors using multi-port versions of fundamental elements of Chua’s table. Generic memcapacitors are the most common type of memcapacitive systems; they behave as ... -
Reconnection-Less Electronically Reconfigurable Filter with Adjustable Gain Using Voltage Differencing Current Conveyor
(Kaunas University of Technology, 2016-12-20)This paper presents a novel reconnection-less and electronically reconfigurable analogue filter. It employs two active elements, Voltage-Differencing Current Conveyor (VDCC) and Dual-Output Current Amplifier (DO-CA) with ... -
Variation of a classical fingerprint of ideal memristor
(Wiley, 2016-05-28)Gradual disappearance of hysteresis with increasing frequency of the exciting signal is considered a classical fingerprint of general memristive systems. The paper analyzes a special version of this fingerprint, when the ... -
Evaluation of Responses in MTL Model Excited from Multiple Stochastic Sources
(International Science and Engineering Society, o.s., 2016-01-15)The paper presents a technique for simulation of stochastic responses and their statistical characteristics in multiconductor transmission lines (MTL). The method follows a theory of stochastic differential equations (SDE) ... -
Wide-Angle Ceramic Retroreflective Luneburg Lens Based on Quasi-Conformal Transformation Optics for Mm-Wave Indoor Localization
(IEEE, 2022-04-11)This paper presents a quasi-conformal transformation optics (QCTO) based three-dimensional (3D) retroreflective attened Luneburg lens for wide-angle millimeter-wave radio-frequency indoor localization. The maximum detection ... -
Short range electromagnetic interface using 0.35 m CMOS blocks for temperature monitoring in isolated areas
(Elsevier, 2022-02-05)Introduction: Infra-red (IR) and visible light (VL) based systems developed for transmission of information about physical quantities (e.g. humidity, temperature) out from closed areas, cannot be effectively employed in ... -
Brazil's Comparative Advantages and Specialization Dynamics in Agri-Food Trade
(Czech University of Life Sciences Prague, 2021-06-30)In the last decades Brazil has become a global agri-food powerhouse. The article interrogates the shape and its stability of revealed comparative advantages in 46 of its agri-food products for the period 1995-2017. The ... -
Characterizing Scalar Metasurfaces Using Time-Domain Reflectometry
(IEEE, 2022-02-20)Two efficient methodologies for the determination of electromagnetic (EM) constitutive properties of scalar metasurfaces are introduced and discussed. In contrast to the available methods, and in line with the recent ... -
Radio Channel Capacity with Directivity Control of Antenna Beams in Multipath Propagation Environment
(MDPI, 2021-12-11)The basic technology that will determine the expansion of the technical capabilities of fifth generation cellular systems is a massive multiple-input-multiple-output. Therefore, assessing the influence of the antenna beam ... -
Single Commercially Available IC-Based Electronically Controllable Voltage-Mode First-Order Multifunction Filter with Complete Standard Functions and Low Output Impedance
(MDPI, 2021-12-13)This paper presents the design of a voltage-mode three-input single-output multifunction first-order filter employing commercially available LT1228 IC for easy verification of the proposed circuit by laboratory measurements. ... -
Z-copy Voltage Controlled Current Follower Differential Input Transconductance Amplifier in Controllable Biquadratic Band-Pass Filter
(Kaunas University of Technology, 2016-08-17)This paper presents the results of study on utilization of Z-copy Voltage Controlled Current Follower Differential Input Transconductance Amplifier (ZCVCCFDITA) active element in a single purpose filtering structure. This ...
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