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In this paper, a new model for calculating the crosstalk of wiring harness is established and this model is named discrete-rotary model. The results of the proposed model are confirmed by Finite-Difference Time-Domain (FDTD). The traditional model is imprecise and limitations because of the little sampling when to calculate the twisted-pair cable crosstalk. So the final update equations are build...
The original layout of the microstrip branch-line 3-dB coupler with considerably smaller dimensions, compared to the conventional one, due to the use of a sequence of high- and low-impedance lines representing a lowpass filter is presented in this paper. Such filters have smaller longitudinal size than conventional microstrip line. The proposed design with a central frequency of 2000 MHz was simulated...
In this work we have studied a design of a miniature three-loop quadrature coupler. Miniaturization of this device is performed by using artificial transmission lines providing the same functions as quaterwave sections. Numerical modeling has been carried out by using 3D electrodynamic modeling software, which allowed to take into consideration a great number of factors that can affect the performance...
The focus of this paper is on the implementation and subsequent improvement of a technique for computing AC interference on buried metallic pipelines due to nearby power transmission lines. In order to perform this task, the finite element method (F.E.M.) is employed. After performing a description of the implementation of the classic F.E.M. approach, a hybrid technique designed to reduce the size...
This work deals with the heat transfer phenomena in agricultural soils exposed to microwave (MW) fields to disinfect them eliminating dangerous organisms without using pesticides. The soil, approximated to a transmission line model, is supposed to be subject to an incident plane wave coming from a horn antenna working at 2.45GHz. Assessing the dielectric constant as a function of the soil water content,...
The sensor positions have substantial effect on the accuracy of remote contact-free reconstruction of currents in power transmission lines from magnetic field data, measured by a set of sensors located under the conductors. By maximizing a performance metric, based on the Fisher information matrix, Nopt sensors are selected from N candidate sensors. The main optimization problem is changed to a convex...
This work describes the initial principles of microwave discernibility conditions for metallic sphere, placed at the center of waveguide cross section. Having previously obtained data for this position, low frequencies range for transmission line are in interest. For further clarification, recombination algorithm from free space to line reflection coefficient was developed. New obtained formulation...
The derivatives in the transmission-line equation can be approximated by difference formula which must satisfy CFL condition. LOD-FDTD provides an unconditional stability method to get the updating equation by alternately solving for the implicit and explicit equation, which improves the computational efficiency greatly, and saves computer resources and memory. In this paper, simulation results demonstrate...
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