Electromagnetic and Thermal Analyses of Improved Gtem Cells for Bioelectromagnetic Experiments

Calò, Giovanna; Petruzzelli, V.

doi:10.2528/pier11122206

Cited by 3 publications

(4 citation statements)

References 24 publications

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“…The design of the GTEM cell is optimised for 914 MHz and 2.10 GHz, two most commonly used frequencies of communication in India. The GTEM cell design 5 is simulated on HFSS 6 , which is based on well known numerical method for electromagnetic problems -finite element method (FEM). A microstrip E-field probe working on the above mentioned frequencies is used to scan the E-field strength inside the cell.…”

Section: Introductionmentioning

confidence: 99%

“…A microstrip E-field probe working on the above mentioned frequencies is used to scan the E-field strength inside the cell. A novel approach to suppress higher order modes at 914 MHz and 2.10 GHz is explained for the design of GTEM cell 5 . The performance of the probe is exhaustively characterised; details are Narang 7 .…”

Section: Introductionmentioning

confidence: 99%

“…The simulation of the design,Fig. 2(c), is carried out beforehand on EM software-HFSS5 to ensure the GTEM cell capabilities.…”

mentioning

confidence: 99%

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Numerical Analysis and Measurement of Electric field Strength inside GTEM Cell at GSM Frequencies

2019

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A miniaturised gigahertz transverse electromagnetic (GTEM) cell is designed and fabricated to generate uniform electric (E-) field, essential for studying the radio frequency exposure effect on tissue equivalent liquids at global system for mobile (GSM) communication frequencies (914 MHz and 2.10 GHz). The simulation procedure is discussed and its results are compared with measurement data. The E-field strength inside the GTEM cell is scanned using a microstrip based E-field probe and complete uncertainty evaluation procedure is discussed. Theoretically, simulated and measured E-field strength is reported with expanded uncertainty.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis and Measurement of Electric field Strength inside GTEM Cell at GSM Frequencies

2019

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“…Interest in using TEM cells increased over the last decades; both experimental and computer simulation tools were developed, for various endpoints [6][7][8][9][10][11][12]. Since the field homogeneity volume inside the TEM cell depends on the ratio between the cell's dimensions and the frequency band at which it is operated, knowing the internal field distribution inside, is a requirement for the design of a proper experiment.…”

Section: Introductionmentioning

confidence: 99%

Design and Validation of a Tem Cell Used for Radiofrequency Dosimetric Studies

Iftode¹,

Miclăuș²

2012

PIER

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Abstract-A Transverse Electromagnetic Mode (TEM) cell is an interesting option for studying the biological effects of radiofrequency radiation at reduced scale (in vitro studies).Controlled and well-characterized exposure conditions are essential for a conclusive investigation: the biological sample is exposed to a uniform incident electromagnetic wave and the dose of absorbed radiation is precisely determined and correlated with the effect. Unfortunately, experimental dosimetry is often unavailable or inapplicable, so that a precharacterized and validated experimental setup is most valuable. As such, the primary objective of the present work is to experimentally validate a computational model of a self-built TEM cell designed for bioelectromagnetic experiments in the 100 MHz-1 GHz frequency range. Validation is achieved by comparing the computed vs. measured values for three significant parameters: scattering parameters, incident electric field distribution, and absorbed power in a set of liquid samples. Successful validation and characterization is achieved by using CST Microwave Studio's finite integration technique (FIT), and respectively a network analyzer for the experimental setup. The secondary objective is a dosimetric study of four different liquid samples loaded in the cell. The absorption coefficient (AC) is used, assimilated to the specific absorption rate (SAR) of energy deposition in the entire sample volume. AC is shown to converge in experiment and simulation up to 800 MHz for all samples. AC doesn't depend directly on the samples' volume (despite greater volumes frequently showing higher absorption) but rather upon the internal field distribution, which in turn mostly depends on the frequency and on the dimensions of the liquid samples.

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Design of a Ka Band GTEM Cell

2015

Frequenz

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A Ka band GHz Transverse Electromagnetic (GTEM) cell with a large uniform volume is proposed in this paper. We calculated the characteristic impedance of the GTEM cell transition, and designed a wideband, low insertion loss，simple structure of the GTEM cell transition. The characteristic impedance of the main part of the GTEM cell is calculated with a new simple and effective method, and the larger uniform fields are be got by suppressed higher TE modes with narrow slot on the septum. The feasibility of the method was assessed with simulation software CST. It provides a method to solve the contradiction between the upper limit frequency and the volume of the GTEM Cell.

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Electromagnetic and Thermal Analyses of Improved Gtem Cells for Bioelectromagnetic Experiments

Cited by 3 publications

References 24 publications

Numerical Analysis and Measurement of Electric field Strength inside GTEM Cell at GSM Frequencies

Numerical Analysis and Measurement of Electric field Strength inside GTEM Cell at GSM Frequencies

Design and Validation of a Tem Cell Used for Radiofrequency Dosimetric Studies

Design of a Ka Band GTEM Cell

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