The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Measurement results and model analyses are presented for off-hull RF emissions caused by intentional transmitters radiating at 2.4 GHz and 5.8 GHz in enclosed, reflective spaces typically found within ships and aircraft. These transmissions can originate from shipboard wireless local area networks, radio frequency identification (RFID) tags and readers, handheld radios, and telemetry sources. Reverberant...
Several studies have characterized industrial environments as being highly reflective. In this paper, we provide the data obtained from electromagnetic field measurements performed at the warehouse of a paper mill. The data is also compared to simulated data. This data proves the existence of non-reflective and very high absorption industrial environments where wireless communication is impossible...
A non-conformal domain decomposition method (DDM) is proposed to investigate signal integrity (SI) of high-speed interconnects on multi-scale, multi-layer printed circuit board (PCB) in this paper. The accuracy and robustness of the proposed method is first demonstrated by analysis of a 4-layer differential pair. Then we studied a 14-layer 16 traces interconnect model to demonstrate the efficiency...
High Speed unshielded differential cables will often have unwanted, but unavoidable, common mode energy in the low GHz frequency range. This work examines a coating of lossy material on the cables and quantifies the amount of loss, and the frequency range of the loss using reverberation chamber measurements.
A case study describing the influence of TFT LCD graphics on automotive radiated emissions testing and its impact to the FM band receiver. The underlying root-cause of the EMI issue is determined using a novel technique that decodes the display's graphics into the transmitted RGB data and predicts the data's impact to radiated emissions. The countermeasure implemented to resolve the issue is equally...
The aeronautics world is in continuous evolution. Actually, the tendency is to substitute the hydro mechanical actuators with electrical ones. However, this means introducing more power electronics and in doing so, the systems become more and more vulnerable to electromagnetic noise emitted. Moreover, the introduction of composite material based structures modifies ElectroMagnetic Interference (EMI)...
Accurate assessment of crosstalk problems in cable harnesses requires simulation methods that account for statistical variation in harness parameters. Use of the T-parameter method to rapidly estimate the statistical variation of crosstalk in cable harness bundles is outlined. Crosstalk is calculated by segmenting the harness into a cascade of equal length multi-conductor transmission lines (MTLs)...
The paper deals with the designing, realization and testing of a network filter used to reduce the electromagnetic disturbances produced by static switching equipment. The tests were done according to the CISPR 17 standard for the determination of the insertion loss for each cell, and the verifications concerning the filter's efficiency with respect to the conducted and radiated disturbances produced...
With the advent and abundance of wireless devices and the confined spaces in which they are installed, the exposure dominance of the direct path and the scattered path needs to be studied. Wireless connectivity and reliability of wireless routers installed in industrial environments, deployment of RFID tags on concrete structures for structural monitoring, safe operation of various sensors coexisting...
This paper analyses jitter increase mechanism due to parallel IO simultaneous switching noise (SSN), while FPGA transceiver operates at multi-gigabit data rates or higher. Several jitter measurement methods and relevant simulations are used to diagnose noise sources and coupling paths. This paper illustrates that transmitter jitter profile is related to power supply noise and inductive crosstalk characteristics...
The time-domain vector fitting (TDVF) was proven to be an extrapolation method which provides about a ten-fold lengthening of a recorded time-domain response and reducing Gribbs phenomenon due to the limited length of the response and its abrupt discontinuity. TDVF is the counterpart of the vector fitting (VF) in the time domain (TD), but it is not popular as VF due to the fact that a technique for...
The total power substitution method is a measurement approach preferred by FCC and other authorities for evaluating the radiated spurious emissions of an RF product. This paper reviews and discusses the setup and procedures for conducting radiated spurious emissions measurement by using this approach. Two estimation methods, the free space path loss (FSPL) method and the site attenuation method, are...
Successful detection of power line arcing requires various algorithms from frequency domain to time domain analysis. This paper explores frequency phenomenon that when analysed with a defined set of algorithms can distinguish between arcing noise and typical power line noise associated with distribution hardware and various noise-generating loads. These techniques may be applied to measuring conducted...
An experimental validation of an electromagnetic band-gap (EBG) based common mode filter is given in this paper. The proposed layout technique is based on planar EBG structures altered by removing the connecting bridges between adjacent patches. The patches are properly dimensioned for ensuring the presence of frequency notches at the frequencies that should be filtered in the common-mode transfer...
In EUROCAE ED-130 two test procedures for radiated field EMC tests are pointed out. These procedures differ in the distance of the field transmitting antenna to the equipment under test (EUT). To cover the use of portable electronic devices (PED) next to the tested system, immunity tests are preformed in the near and far field region of the transmitting antenna. In this paper these tests are realized...
Engineering of absorbing bulk and sheet composite materials, including nanocomposites, for various EMI applications, requires adequate prediction of frequency and concentration behavior of these composites. This paper proposes two simple analytical formulations for effective permittivity and permeability of magneto-dielectric composites as functions of frequency and concentration. The first new proposed...
In power distribution networks (PDN), the modelling of the mid-frequency inductance for Zpp type plane pairs is very important. It is a key step for the placement of the decoupling capacitors. This paper gives an efficient approach for the calculation of the inductance for different capacitor placements. The PEEC based formulations takes advantage of the opposite currents in the planes. This leads...
The objective of this paper is to investigate the use of periodic artificial materials for shielding high-frequency high-impedance near fields produced by electric dipoles. The problem is handled numerically by applying the Array Scanning Method that reduces the problem of an aperiodic source close to a periodic screen to a superposition of phased-dipole-array problems (where the array periods are...
The analysis presented herein contains closed-form analytical expressions to calculate attenuation in a layered structure “rough metal-dielectric-dielectric”, which is a practically important problem in separating dielectric loss from rough conductor loss in actual PCB stripline geometries, when measuring dielectric constant (Dk) and dissipation factor (Df) using travelling wave...
We present a novel parameterized model order reduction technique applicable to the Partial Element Equivalent Circuit analysis that provides parametric reduced order models, stable and passive by construction, over a user defined design space. We treat the construction of parametric reduced order models on scattered design space grids. This new parameterized model order reduction technique is based...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.