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This paper is focused on input impedance optimization of a stripline. The stripline for electromagnetic susceptibility testing represents a radiating structure which is composed of one active and one or more grounded conductors. The characteristic impedance of the stripline is given by the dimension and the material between conductors. If the characteristic impedance does not match to the output impedance...
In this study, RLCG method is used to estimate a low voltage transmission line for twisted overhead and underground low voltage distribution cables. This model is applied for cables with different types, different sections and lengths taking account the capacitive and the inductive coupling. SPICE determination of transmission characteristics and cables crosstalk are validated throughout physical...
Cable ferrites are noise suppression components acting as a common-mode filter. In former work a new characterization method for cable ferrites, using a TEM waveguide, was described. It provides a new set of more representative ferrite parameters. From these parameters, the impedance of the currently widely used wire-loop setup measurement can be derived as well as for other terminations of the wire...
Low voltage power line carrier communication simulation software and simulation test system is analog carrier communication channel environment in different ways, the two systems complement each other, the former design stage for communications equipment, flexible and comprehensive simulation of the channel complex transmission characteristics; the latter stages of a communication device for debugging,...
Studies have shown that there are a lot of low-voltage power line is one of the main obstacles to strong noise limit for data transmission quality. Power line noise can be divided into steady background noise, narrowband interference noise, sudden impulse noise and periodic noise. Background noise is distributed throughout the communication band, low-voltage power line up white Gaussian noise 22dB...
The use of semi-physical simulation platform for school laboratory and classroom building scene a lot of field measurements, analysis of power line channel transmission characteristics of the different environments, and features a three-dimensional graphic display of variable power line channel under different scenarios. At the same time in order to improve the efficiency of the data analysis, the...
Passive EMI filters occupy significant volume in a power converter. This work involves the study of utilizing Active EMI Filters (AEF) and Hybrid EMI Filters (HEF) to reduce the volume of passive filters. The DUT under consideration is a 30 W AC-DC converter. Since the power level less than 65 W it does not have a PFC stage. In this work, noise sensing is carried out using voltage sensing methodology...
In this study, a wideband terahertz antenna for indoor wireless communication systems is proposed. Antenna has high input impedance which is reasonable for terahertz systems due to the high output impedance of terahertz sources. Proposed antenna has been designed to operate in 0.67 THz which is one of the appropriate frequencies considering the atmospheric attenuation conditions for short range indoor...
Busbar distribution systems are highly preferred to carry electrical energy as a part of the low-voltage grid in order to meet power requirements, especially in industrial areas. From the perspective of broadband power line communication possibilities in the smart grid concept, there is a need to know for high-frequency characteristics of busbars. This paper investigates the influences of line length...
In this paper, after explaining the reasons why some players asked to standardize also the 3–150 kHz EMC maximum acceptable range, we describe the type of disturbances depending on the frequency range and on the type of equipment that can generate such disturbances. Furthermore, we illustrate the different methods to reduce them. In particular, we explain a method to design a suitable passive filter...
In high voltage transmission lines, the shield wires are often sectionalized for several reasons. This practice may have considerable effects on power line communications in multiconductor transmission lines. A careful simulation is performed in order to put in evidence the relevant channel features.
Travelling Wave Fault Locators (TWFL) allow a higher precision in most cases than typical impedance based fault location methods. One of the major problems with it, is the measurement of the arrival times of Travelling Waves (TWs). In this paper, a new method to compute the difference of arrival times of the first wavefront is presented. The method is based on the telegrapher's equations. The paper...
DC power distribution gains popularity in future residential, renewable energy, transportation and data centers. Such dc system can be connected to ac system through bidirectional interface converter. Compared with isolated converters, transformerless solutions have the advantages of higher power density, efficiency, and lower cost. One concern about the non-isolated connection is the coupled common-mode...
The demand of shielded cables and connectors has recently been increased in the area of electrical vehicles as well as of aerospace and defense. The performance of shielded cables and connectors is measured by transfer impedance or screening attenuation. IEC 62153-4 series standards define the transfer impedance and screening attenuation and describe the measurement method of these parameters. This...
This paper describes a wide dynamic-range and accurate complex-impedance detector for adaptive power amplifier load tuning systems. The detector IC, fabricated in a 130 nm SOI technology, consumes 7mA under 2.5V supply voltage. It can handle LTE signals with an input power from 0 dBm up to 40 dBm thanks to its variable attenuator system. System level measurements show that the detector has a very...
A modified three-phase cable model, which takes into account the high-frequency characteristics of the cables and the earth, is proposed for high-frequency signal analysis, e.g., the detection and location of partial discharges in cables. Closed-form expressions of the modal propagation constants are derived based on the modal decomposition theory. A global sensitivity analysis of the modal velocities...
Powerline communications transfer high-speed information in the power grid equipment which has obtained great success. In order to make transformation rate higher, the bandwidth is 1–30MHz. Broadband power line as the communication link whose channel characteristics have very important effect on the communication quality. This paper analyses these characteristics of impedance, noise and the signal's...
This paper describes how a linear relationship between control voltage and transmission coefficient can be obtained for a PIN diode biphase attenuator. This linearisation comes out from a theoretical study of the attenuator. Results given here, are obtained for a microstrip biphase attenuator optimised at 1.59 GHz.
This contribution aims at studying the input impedance of household appliances in the frequency range from 9 kHz to 500 kHz (FCC band). The method using the network analyzer is chosen as it provides a very good trade-off between required accuracy and ease of use. Some of the most common household appliances present in customer installations are characterized in terms of impedance in their respective...
In recent years, mobile cranes have been larger, and enhancements of various safety devices and assist functions have also been demanded. In this paper, a hoist-rope channel of mobile crane has been explored as a new area for PLC application to achieve a high-speed communication between boom-tip and hook. The channel is a loop circuit formed by a rope and two sheaves, and its simple channel model...
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