2002 IEEE International Symposium on Electromagnetic Compatibility
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High sensitivity 50 Hz-1 MHz probe for B and dB/dt
Tập 1 - Trang 55-60 vol.1
An accurate broadband sensor for the analysis of magnetic induction B in the range 10 nT-5 mT is presented. Choosing appropriate amplifier circuits allows measurement of either B or dB/dt, in the frequency range 50 Hz-1 MHz, which makes it possible to detect very weak high-frequency fields with attenuation of the 50 Hz power frequency. The probe is also suitable for on-site measurements of common-......
#Probes #Magnetic field measurement #Frequency measurement #Electric variables measurement #Magnetic sensors #Magnetic analysis #Broadband amplifiers #High power amplifiers #VHF circuits #Attenuation measurement
A detailed test method for measuring radiated spurious emissions by signal substitution and the effect of relevant source parameters
Tập 1 - Trang 509-514 vol.1
This paper proposes a detailed test procedure for measurement of radiated spurious emissions (from a 3G Wireless Base Station) in a semi-anechoic chamber by means of 'signal substitution'. The proposed method may be adopted suitably for meeting the requirements of the FCC Rules Part 22 and 24 radiated spurious emissions requirements for licensed transmitters. This paper also quantifies the effect ......
#Testing #Antenna measurements #Enterprise resource planning #Frequency #Performance evaluation #Electromagnetic compatibility #Area measurement #Transmitting antennas #Base stations #Measurement standards
Application of higher-order FEM elements to the analysis of microstrip structures
Tập 2 - Trang 1015-1019 vol.2
Microstrip structures, formed by metal traces printed on a dielectric substrate above a reference plane, are frequently the object of electromagnetic modeling. In this paper, hybrid FEM/MoM formulations employing conventional Whitney elements and newly developed linear-tangent/linear-normal (LT/LN) tangential vector finite elements (TVFEs) are applied to the analysis of microstrip structures with ......
#Microstrip #Finite element methods #Solid modeling #Message-oriented middleware #Dielectric substrates #Electromagnetic modeling #Circuits #Impedance #Transmission line matrix methods #Application software
Extending the operation of mode stirred chambers to low frequencies
Tập 2 - Trang 964-965 vol.2
In this paper a new technique is presented to excite the fields inside a mode stirred chamber down to very low frequencies. The proposed approach is then simulated using the method of moments (MoM). In a previous paper by the authors, it was shown that this type of simulation agrees very well with actual measurements. The proposed technique is based on the use of wires parallel to the coordinate a......
#Frequency #Wires #Power transmission lines #Transmission line theory #Wheels #Coaxial components #Moment methods #Message-oriented middleware #Transmission line measurements #Electromagnetic measurements
Measurement uncertainty of the target scattering parameters built in the uncertainty estimation of ESD simulator
Tập 2 - Trang 895-900 vol.2
In a previous paper by the author (see 14/sup th/ Int. Zurich Symposium on EMC, p.189-92, 2001) uncertainty estimation of current wave by calibration of ESD simulator is presented The uncertainty is defined there as discrepancy between current wave calculated for low frequency transfer impedance and for frequency dependent transfer impedance. This is termed here the basic uncertainty. Such definit......
#Measurement uncertainty #Scattering parameters #Electrostatic discharge #Frequency dependence #Frequency estimation #Electromagnetic compatibility #Calibration #Voltage #Impedance measurement #Frequency measurement
Analysis on the effectiveness of the 20-H rule using numerical simulation technique
Tập 1 - Trang 328-333 vol.1
With increasing demand for higher operating frequencies, printed circuit board (PCB) designers are faced with numerous obstacles during the design cycle. The 20-H rule is one layout technique that is recommended to minimize radiated fields propagating from the edges of a PCB. These fields, either magnetic or electric, may corrupt adjacent cable assemblies, sheet metal enclosures and aperture openi......
#Numerical simulation #Frequency #Finite difference methods #Printed circuits #Electromagnetic propagation #Magnetic domains #Assembly #Apertures #Electromagnetic radiation #Time domain analysis
A compensation technique to aid the comparison of experimental and modeled data
Tập 1 - Trang 475-480 vol.1
The comparison of numerical model data against experimental mental data is common in EMC research and development. However, it is unlikely that the model will be an exact replica of the experimental situation, or vice versa. This is likely to lead to differences in the two sets of results, which complicate the comparison process. This paper presents an algorithm which allows compensation for compl......
#Distortion #Numerical models #Electromagnetic compatibility #Equations #Research and development #Filtering #Humans #Filters #Degradation #Signal analysis
NSTL evaluation of the compact EMC chamber with ferrite tiles being partially lined on the floor ground
Tập 2 - Trang 958-963 vol.2
Compact fully anechoic chambers may gradually replace open area test sites as the preferred type of testing facility for the measurement of radiated emissions. Based on FDTD modeling approach, a numerical tool with the measuring tunable dipole antennas being considered is established to simulate the NSTL performance of the compact EMC chamber with different layout design of ferrite tiles. This pap......
#Electromagnetic compatibility #Ferrites #Tiles #Anechoic chambers #Antenna measurements #Open area test sites #Testing #Area measurement #Finite difference methods #Time domain analysis
Finite size substrate and ground plane effects on propagation characteristics of planar interconnections
Tập 2 - Trang 701-704 vol.2
The groundplane and substrate finitudes are examined on the propagation characteristics of planar interconnections using the finite element method. The observed effects, for both truncations, are quantified and explained for the microstrip, coplanar waveguide (CPW) and stripline structures.
#Coplanar waveguides #Microstrip #Stripline #Dielectric substrates #Permittivity #Capacitors #Strips #Dielectric losses #Planar waveguides #Magnetic analysis
2-D approach to the analysis of semianechoic chambers using a hybrid technique
Tập 1 - Trang 279-284 vol.1
Semianechoic chambers are the most widely used emplacements for electromagnetic compatibility (EMC) tests. In this work a new and efficient technique for the analysis of 2-D simplified model of a chamber with arbitrary absorber is introduced and validated Some advanced results are presented, and a 2-D figure of merit for studying the overall behaviour of the chamber is proposed.
#Electromagnetic compatibility #Testing #Maxwell equations #Frequency #Magnetic fields #Open area test sites #Laboratories #Electromagnetic fields #Geometry #Admittance