Investigations on EM field coupling in dielectric resonator

1989 ◽  
Vol 25 (4) ◽  
pp. 2935-2937 ◽  
Author(s):  
T. Bhattacharjee ◽  
X. Tu
Keyword(s):  
Dielectric Resonator ◽  
Field Coupling ◽  
Em Field

Transient analysis of the EM field coupling to multi-conductor transmission lines using the NILT method

2012 ◽  
Vol 4 (4) ◽  
pp. 463-472 ◽  
Author(s):  
Adnen Rajhi ◽  
Said Ghnimi ◽  
Ali Gharssallah
Keyword(s):  
Numerical Method ◽  
Transmission Lines ◽  
Computing Time ◽  
Wave Excitation ◽  
Transmission Line Theory ◽  
Field Coupling ◽  
Line Theory ◽  
Em Field ◽  
The Time Domain ◽  
Superposition Effect

A simple and efficient numerical inversion Laplace transform (NILT) algorithm is implemented in MATLAB environment based on the quotient difference method to solve the problem of electromagnetic (EM) field coupling to lossy or lossless multi-conductor transmission lines (MTL) illuminated by an EM incident field. Two major points are treated in this work for the lossy MTL system excited by an incident EM field; the first one is the optimum equivalent circuit taking into consideration the different physical concepts based on the transmission line theory and the second point deals with the choice and implementation of the numerical method for less computing time and for efficient results. In this paper, the effect of the EM coupling is treated and it is based on the superposition effect of each distributed voltage current sources using the NILT numerical method. Results of the near end and far end voltages and currents for an MTL system are presented and displayed for two types of microwave (MW) structures in the time domain for the case of a plane wave excitation. It has been shown that a non-homogeneous MW structure or multilayered system with a specific choice of the dielectric constant has an advantage for less transient EM coupling due to the external EM field.

scholarly journals Simplified modeling of EM field coupling to complex cable bundles

2010 ◽  
Vol 8 ◽  
pp. 211-217 ◽  
Author(s):  
B. Schetelig ◽  
J. Keghie ◽  
R. Kanyou Nana ◽  
L.-O. Fichte ◽  
S. Potthast ◽  
...  
Keyword(s):  
Optimization Algorithm ◽  
Bundle Method ◽  
New Approach ◽  
Differential Signal ◽  
Twisted Pair ◽  
Field Coupling ◽  
Em Field ◽  
Simplified Modeling ◽  
Cable Bundle

Abstract. In this contribution, the procedure "Equivalent Cable Bundle Method" is used for the simplification of large cable bundles, and it is extended to the application on differential signal lines. The main focus is on the reduction of twisted-pair cables. Furthermore, the process presented here allows to take into account cables with wires that are situated quite close to each other. The procedure is based on a new approach to calculate the geometry of the simplified cable and uses the fact that the line parameters do not uniquely correspond to a certain geometry. For this reason, an optimization algorithm is applied.

scholarly journals Numerical calculation of shielding effectiveness of enclosure with apertures based on EM field coupling with wire structures

2015 ◽  
Vol 28 (4) ◽  
pp. 585-596 ◽  
Author(s):  
Tatjana Cvetkovic ◽  
Vesna Milutinovic ◽  
Nebojsa Doncov ◽  
Bratislav Milovanovic
Keyword(s):  
Numerical Model ◽  
Dipole Antenna ◽  
Coaxial Cable ◽  
Shielding Effectiveness ◽  
Experimental Procedure ◽  
Field Coupling ◽  
Receiving Antenna ◽  
Tlm Method ◽  
Em Field ◽  
The Impact

Shielding effectiveness of a protective metal enclosure with apertures and receiving antenna placed inside is numerically considered. The purpose of the antenna, here considered as a dipole, is to detect the electromagnetic (EM) field level within the enclosure and to transfer this information via a coaxial cable to a network analyzer. This follows the experimental procedure used to measure the shielding effectiveness of enclosure. A numerical model, based on the Transmission-Line Matrix (TLM) method enhanced with so-called wire node, is used to simulate this dipole antenna/cable arrangement in order to investigate how much it disturbs the level of shielding effectiveness due to their two-way coupling with EM field inside the enclosure. The numerical model, whose accuracy is proved by comparison with experimental results available in the literature, is used to consider the influence of radius and length of the dipole-receiving antenna and the impact of cable presence on the distribution of EM field inside the enclosure and shift of resonant frequencies for normal and oblique incidence.

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