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The reduction in radiated electromagnetic field of printed circuit board with active components and varying Power Distribution Networks (PDN) has been investigated. The PDN consisted of alternative power solutions such as power traces, 2 single cell Electromagnetic Band Gap structures (EBG) or asymmetric EBG. The radiated electromagnetic field of these boards was measured in a reverberation chamber...
Several solutions to decrease the propagation of simultaneous switching noise (SSN) in power distribution network (PDN) were evaluated for boards with active components. Radiated emission of the boards using power track, 2 cell symmetric power island (or one-cell Electromagentic Band Gap (EBG)) with square patches or asymmetric EBG was measured using a Reverberation Chamber, and the results were compared...
The effect of Electric Fast Transients (EFT) phenomena in an Ethernet interface set-up is investigated in order to get more insight in coupling and interference mechanisms, robustness and susceptibility levels of a typical Ethernet installation on board of a naval vessel. It is shown that already a small EFT pulse is capable of disturbing or disrupting Ethernet communication at protocol level, which...
This paper discusses a novel design of Power Distribution Network (PDN). By physical structuring of the power plane into repetitive symmetrical and asymmetrical segments of varying size, suppression of the propagation of unwanted noise throughout the PDN over a wide frequency range is achieved. Prototype boards were built on standard FR4 and thin FR4 substrates and characterized using a Vector Network...
Weak power supply networks are very sensitive to non-linear low power loads. Electronics in low power loads are non-linear, very basic, and consisting of a rectifier bridge and bulk capacitor, consuming current only in the peak of the supplied voltage. Due to the relative high power supply network impedance the waveform of the supplied voltage is heavily distorted. In this paper the effect of energy...
The effect of embedded capacitance material on the size reduction and filtering performance of electromagnetic band gap (EBG) structures etched on a power plane has been investigated. Due to the high permittivity of the embedded material the effective band shifts to much lower frequencies. The impact of these EBG structures on resonances in power distribution network has been modeled using an equivalent...
The noise reduction effect in a Power Distribution Network (PDN) by implementing Electromagnetic Band Gap structures (EBG) on standard and high permittivity substrates has been investigated. Boards with different EBG structures have been modelled and designed. Using the EBG structures the Power Distribution Network (PDN) becomes a low-pass filter reducing unwanted resonances and radiated electromagnetic...
The number of power distribution user networks feeding energy efficient equipment is growing. The situation is becoming even more complex with the introduction of distributed generation. The network connects non-linear electronic loads, as well as sources. We investigated the effect of such a source, a photovoltaic converter on the voltage quality. These results have been listed and compared to measurements...
This paper discusses reduction of radiated emission of a printed circuit board by implementing Electromagnetic Band Gap structures (EBG) in the power distribution system. EBG structures and their effect on power plane resonances is analysed and several boards with EBG structures have been designed. The performance of standard power plane and EBG structured power plane has been measured. The scattering...
Non-linear loads are replacing all linear loads while no emission limits are defined for low power devices such as energy saving lighting. The widespread use of lighting equipment results in high harmonic distortion of the power distribution network. This paper presents the emissions of an installation of many energy saving lights and the effect of emission of energy saving lights in general on the...
In modern buildings virtually all electric loads are non-linear. Neither the applicable standards for supply of electrical energy nor those for consumption of electrical energy take into account the replacement of linear loads by non-linear loads. Low power equipment is exempted in standards assuming that all other (linear) loads dominate the power quality. In modern buildings there is a huge number...
Complex dielectric permittivity of 4 different composite materials has been measured using the transmission line method. A waveguide fixture in L, S, C and X band was used for the measurements. Measurement accuracy is influenced by air gaps between test fixtures and the materials tested. One of the materials, unprotected glass fiber composite, has directional effects. All materials tested show low...
In modern buildings virtually all electric loads are non-linear. The applicable standards for consumption of electrical energy do not take into account the replacement of linear loads by non-linear loads. The exemptions made in those standards for low power devices, and the widespread use of such devices result in a high harmonic distortion of the power distribution network. This paper presents the...
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