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Showing 1-25 of 544 resultsfor "Index Terms":transverse electromagnetic (TEM) cell
"Index Terms":transverse electromagnetic (TEM) cell
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Simple Semianalytical Septum Design for Improved Matching in Open TEM Cells
Open transverse electromagnetic (TEM) cells are used for many applications. Usually, such cells are built of metal sheets with linear profiles. Due to these simple geometries, impedance matching is limited. To improve the matching, a simple semianalytical method for an advanced septum profile is developed. Dominant TEM-mode propagation and an expression for the characterist...Show More
An Experimental Investigation of Higher Order Mode Suppression in TEM Cells
Transverse electromagnetic (TEM) cells can be used to evaluate the electric and magnetic fields coupling from integrated circuits (ICs). The propagation and reflection of higher order modes in the cells limits the bandwidth of TEM cells. This paper investigates several methods for suppressing higher order modes in TEM cells in order to extend the applicabl...Show More
Three new strip-line TEM cells in EMC test
2016 IEEE International Conference on Electronic Information and Communication Technology (ICEICT)
Year: 2016 | Conference Paper |
The strip-line TEM cell is used to measure the EMC of equipment and devices. Strip-line TEM cell can be widely used in measuring the EMC (Electromagnetic Compatibility) performance from automotive industry to IC components. In this paper we present three different strip-line TEM cells. And cut slot on conductor can extend the frequency range of strip-line TEM...Show More
Control of the TE_{\bf 111} Resonance inan Asymmetric TEM Cell
The TE111 resonance has been addressed in an asymmetric "Crawford-style" transverse electromagnetic (TEM) cell using two half- wave slots cut into the septum. Surface currents generated on the septum due to the resonance are at right angles to the TEM cell axis. Appropriately sized resistors placed at the midpoint of the slots load these cross-axial septum currents. The res...Show More
Simple Method to Generate Dominant E- and H-Fields Inside a Four-Port TEM Cell
We propose a simple method to generate dominant E (DE)- or dominant H (DH)-modes, which builds near-field like environments in a four-port transverse electromagnetic (TEM) cell. Each DE or DH mode is intended to present very high or very low impedance values, which remain stable over a wide frequency region of interest. To achieve this, we apply signals, in- or out-of-phase, into ports...Show More
Design of a TEM cell using both multi-step and piecewise linear tapering
2016 8th International Symposium on Telecommunications (IST)
Year: 2016 | Conference Paper |
Cited by: Papers (2)
The transverse electromagnetic (TEM) cell is used for electromagnetic interference/compatibility (EMI/EMC) tests of the small RF devices in a laboratory environment. The standard electromagnetic (EM) fields created in the shielded environment of a TEM cell can also be used for calibration of the EM field probes. In this paper, a 50 Ω open TEM cell is designed to...Show More
FDTD analysis of a gigahertz TEM cell for ultra-wideband pulse exposure studies of biological specimens
Gigahertz transverse electromagnetic (GTEM) transmission cells have been previously used to experimentally study exposure of biological cells to ultra-wideband (UWB), monopolar, electromagnetic pulses. Using finite-difference time-domain (FDTD) simulations we examine the time-dependent electric field waveforms and energy dose spatial distributions within a finite volume of biological [...Show More
Synthetic TDR Measurements for TEM and GTEM Cell Characterization
Michele Borsero;Giuseppe Vizio;Daniela Parena;Valeria Teppati
This paper describes the main features of the time-domain reflectometry (TDR) measurement technique and, in particular, the TDR analysis performed using a proper operating mode of the vector network analyzer (VNA), which is called synthetic TDR. Furthermore, some results of reflection measurement, which aim to characterize the impedance behavior of transverse electromagnetic (TEM) and gigahe...Show More
Using TEM Cell Measurements to Estimate the Maximum Radiation From PCBs With Cables Due to Magnetic Field Coupling
Common-mode currents can be induced on cables attached to printed circuit boards (PCBs) due to electric and magnetic field coupling. This paper describes a technique for using transverse electromagnetic (TEM) cell measurements to obtain an effective common-mode voltage (or magnetic moment) that quantifies the ability of traces and integrated circuits on PCBs to drive common-mode curren...Show More
Finite-difference time-domain analysis of a complete transverse electromagnetic cell loaded with liquid biological media in culture dishes
Transverse electromagnetic (TEM) cells can be used for exposing biological culture specimens to electromagnetic fields and observing possible anomalous effects. The uniformity of field exposure is critical to quantifying the biological response versus the electromagnetic dose. Standing waves and other electromagnetic field nonuniformities can cause nonuniform exposure. This paper repor...Show More
Examinations of higher order mode cutoff frequencies in symmetrical TEM cells
2009 IEEE International Symposium on Electromagnetic Compatibility
Year: 2009 | Conference Paper |
Cited by: Papers (6)
Previous studies on the higher order mode cutoff frequencies for symmetrical TEM cells include matrix solutions from a mode matching method, approximate expressions based on the assumption of small gaps between the inner conductor and the sidewalls, or numerical simulations based on meshing the cross-section. Good agreement among the methods has been achieved in most cases. However, so...Show More
This paper deals with the efficiency of TEM shield. Operator working with TEM cell should be protected from the radiation from inside the cell or from any possible leakage (from the door, i.e.). Theoretical analysis and calculation was used to compare standard materials for the shield with cheaper and more simple solution. Simple aluminium foil placed on a dielectric materi...Show More
Low-Cost Broadband Electronic Coupler for Estimation of Radiated Emission of Integrated Circuits in TEM Cell
Transverse electromagnetic (TEM) cell is a well-known method for the qualification of radiated electromagnetic emission from integrated circuits (ICs). Combined with a 180° hybrid coupler, it provides a simple method for quantifying radiated emission (RE). However, typical transformer or coupled line based hybrid couplers have limited bandwidth which cannot cover the full frequency ran...Show More
Impact of Mode Propagation on Radiated Immunity Characterization in Commonly Used TEM Cells
2019 12th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)
Year: 2019 | Conference Paper |
Cited by: Papers (1)
This paper investigates the impact of propagation modes on radiated immunity characterization inside most commonly used transverse electromagnetic (TEM) cells. The first six modes together with their corresponding cutoff frequencies in two standard open and closed cells are firstly introduced and presented. It is then followed by an immunity testing case study of the electromagne...Show More
Modeling, Simulation & Validation of TEM Cell for Short Pulse Sensor Verification
Bala Narendra Ambati;Venkata Ramana Botsa;Suresh Kumar Munaka;Subbarao Bandaru
2018 15th International Conference on ElectroMagnetic Interference & Compatibility (INCEMIC)
Year: 2018 | Conference Paper |
Cited by: Papers (6)
The Transverse Electro-Magnetic (TEM) cell is popular among EMI/EMC community ever since its invention. Its versatility in radiated susceptibility tests as well as in measuring radiated emissions from a product.In this paper, open TEM cell was modeled using CST and analyzed it for pulsed signals viz. Square and Double Exponential type. RS105, EMP pulse characteristics were ...Show More
This paper presents a novel simulation methodology to model the coupling between a GTEM cell and an RF-ID antenna. This model can further be used in a simulation test bench to verify the susceptibility of contactless RFID cards to RF interference from mobile phone transmissions. In this test bench the immunity test signals are injected into the contactless smart card under design within a mo...Show More
Characterization of a TEM cell-based setup for the exposure of biological cell suspensions to high-intensity nanosecond pulsed electric fields (nsPEFs)
Sophie Kohler;Thi Dan Thao Vu;P. Thomas Vernier;Philippe Leveque;Delia Arnaud-Cormos
2012 IEEE/MTT-S International Microwave Symposium Digest
Year: 2012 | Conference Paper |
In this paper, we propose and characterize a setup based on a Transverse ElectroMagnetic (TEM) cell to expose a Petri dish filled with a biological suspension to nanosecond high-voltage pulsed electric fields. Monopolar and bipolar pulses of 1.2 ns duration and 1.6 kV amplitude are delivered to the TEM cell. Time domain measurements and numerical results show that the syste...Show More
Determination of the coupling model of common mode chokes using a TEM cell
Marine Stojanovic;Frédéric Lafon;Richard Perdriau;Mohamed Ramdani
2017 International Symposium on Electromagnetic Compatibility - EMC EUROPE
Year: 2017 | Conference Paper |
Cited by: Papers (3)
Filter design heavily depends on magnetic inter-component couplings. To determine the magnetic coupling, i.e. the mutual inductance between two components, it is necessary to define a coupling model, in order to figure out to which extent a component catches the magnetic field. The coupling model of complex components, such as common mode chokes, cannot be established directly from geometry becaus...Show More
Differences in Specifications of Field Uniformity for GTEM Cell between the Standard IEC 61000-4-3: 2002 and IEC 61000-4-20: 2003
The 2006 4th Asia-Pacific Conference on Environmental Electromagnetics
Year: 2006 | Conference Paper |
Cited by: Papers (2)
The standard IEC 61000-4-20:2003 includes the GTEM cell as a measurement facility for EMC emission and immunity testing. The aim of the IEC 61000-4-3:2002 standard is to establish a common reference for radiated electromagnetic fields immunity tests. This paper describes the differences in requirements of fields uniformity assessment between the above-mentioned two standards and also gives s...Show More
Eigen Modes of the GTEM Cell
Serhii Makarchuk;Artem Chernov;Irina Golubeva;Victor Kazmirenko;Yuriy Prokopenko;Kim Young Dae
2024 IEEE 42nd International Conference on Electronics and Nanotechnology (ELNANO)
Year: 2024 | Conference Paper |
The paper addresses problems of TEM cell design used for wireless communication terminals testing with focus on GigaHertz TEM (GTEM) cells. To maximize usable test volume modern TEM cells often have an asymmetric design, where septum is displaced away from loading door of the cell. Doing so will alter electromagnetic field distribution, so quantitative cha...Show More
Using Termination Effect to Characterize Electric and Magnetic Field Coupling Between TEM Cell and Microstrip Line
Chunlei Shi;Wenxiao Fang;Changchun Chai;Yun Huang;Yunfei En;Yintang Yang;Yuan Liu;Yiqiang Chen;Xueyang Liao
In this paper, we change terminal loads of a microstrip line to separate electric field coupling and magnetic field coupling between a microstrip line and a transverse electromagnetic (TEM) cell during radiated emission measurement. Such separation can also be validated by another terminal load. After validation, the effect of termination on both couplings is investigated, and the requ...Show More
Characterizing a Transverse Electromagnetic Cell with Nanosecond Pulsed Electric Fields for Biological Applications
B. Camps-Raga;N. Boriraksantikul;P. Kirawanich;W.C. Nunnally;N. E. Islam
2008 IEEE International Power Modulators and High-Voltage Conference
Year: 2008 | Conference Paper |
The operating characteristics during a transient of a transverse electromagnetic (TEM) test cell coupled to a nanosecond electromagnetic pulse generator are described through experiment and simulations. The coupled system provides a uniform field in a large area for nanosecond pulsed electric fields (nsPEFs) effects studies on biological samples. Results show that the rise time and the...Show More
Analysis of the Field Distribution inside Dielectric Object Loaded in TEM Cell Using Hybrid FEM-BEM Method
2007 International Symposium on Electromagnetic Compatibility
Year: 2007 | Conference Paper |
The field distribution inside the dielectric equipment under test (EUT) loaded in transverse electromagnetic (TEM) cell is researched. The FEM-BEM domain decomposition method was proposed. For the EUT, which is the interested region, the finite element method was applied, while for the TEM cell the boundary element method is used. This method reduces the computational time ...Show More
Mode Suppressed TEM Cell Design For High Frequency IC Measurements
Shaowei Deng;David Pommerenke;Todd Hubing;J. Drewniak;Daryl Beetner;Dongshik Shin;Sungnam Kim;Hocheol Kwak
2007 IEEE International Symposium on Electromagnetic Compatibility
Year: 2007 | Conference Paper |
Cited by: Papers (8)
TEM cells or GTEM cells can be used to evaluate the radiated emissions of integrated circuits (ICs). The applicable frequency bandwidth of a TEM cell is limited due to the resonances of higher order modes. This paper describes how a TEM cell can be modified to extend the frequency range without changing the test topology. Several methods are proposed and i...Show More
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