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The time-domain response is analyzed by precise integration method in condition of non-uniform coupled transmission lines in this paper. Different to the traditional method, this method directly analyzes it according to the non-uniformity of non-uniform transmission lines so as to avoid decoupling the coupled telegraph equations. The accuracy and speed of the analysis are improved greatly. It is a...
An asymmetrical grounded resonators technique to suppress the common-mode radiation (or electromagnetic interference) and mode conversion caused by the slot-crossing differential signals is proposed. The grounded resonators can be implemented on printed circuit board or package substrate without additional cost by just designing open stubs with shorting via connecting to the reference plane. The design...
The progressive reduction in size of electronic components demands more and more a quantum treatment of their internal performance. On the other hand the macroscopic devices in which they are imbedded unavoidably requires a description in terms of macroscopic, usually electromagnetic quantities. The convenience follows of having at one's disposal integrated models describing the complete performance...
In this paper, using common source topology, a 5 stages low noise and high gain amplifier has been designed. In the next section, an accurate model for passive components and transistor based on the measured S-parameters of each component have been derived. LNA design, optimization and simulated result has been presented in the last section.
This paper presents an analysis of radiated electromagnetic disturbances between electronic devices (parasitic emission source) and a transmission line. The study aims to model the coupling and for this purpose, two concepts are combined: the emission source is modelled by an array of elementary dipoles (electric and magnetic) and the induced voltage in the transmission line is calculated from the...
With the advancement in communication industries going at a rapid pace, the crucial role of EDA (electronic design automation) tools in virtually every aspect of communication circuit design, fabrication and testing is inevitable. Semiconductor scaling limits for communication devices are forcing designers to look in to novel circuit and design techniques which necessitates for greater modeling complexity...
The purpose of this study is to develop a method to measure transmission line parameters for protection relay setting. For relaying schemes such as distance relays, current differential relays and fault locators, it is very useful to ascertain the precise setting values in service, without the need for setting calculations prior to installation, and also for the relays to be able to adaptively change...
This present paper is a farther application of earlier investigation of transmission line model relating to the field-transmission line coupling. A modified model was derived before based on the Taylor model, and the distributed excitation source terms in this modified model are expressed in total field components rather than incident field ones. Combined with electrocircuit and electromagnetic simulation...
This paper presents an analysis of external electromagnetic field coupling on the single-conductor coupling, using transmission line theory, the shielding theory, two-port network theory and antenna theory. transmission line theory, the calculation method of the induced current and voltage generated on the transmission line which is generated by external electromagnetic field is desirably in this...
For different values of the decay constant in the modified transmission line model with exponential decay (MTLE) and for different channel heights the results for lightning electromagnetic field (LEMF) at different distances from the channel-base are presented in this paper, so as for the spatial and temporal current distribution along the channel. The decay constant influence on LEMF above perfectly...
A new FDTD method based on equivalent circuit models has been presented for the transient analysis of transmission lines with frequency-dependent parameters. In contrast to the RC-based algorithms, no convolution computation is required in the proposed method. The generalized two-port equivalent model makes it straightforward to combine transmission lines with arbitrary termination networks. The numerical...
Digital subscriber lines such as ADSL, SHDSL and VDSL that operate over existing transmission lines are still on the top of telecommunication providerpsilas interest. Testing of these services is a part of development and educational centers that are interested in xDSL. This report is concerned with the transmission lines and their approximation through artificial transmission lines that represent...
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