Transmission Line Impedance Calculator: TxLine[Copy link]
Introduction:
We know that when the characteristic impedance of the line is discontinuous, the signal will be reflected through the discontinuous point, causing the signal to overshoot and ring. When laying out the circuit board for a low-speed digital circuit, there is no need to consider the width of the trace and the spacing between the layers of the multi-layer circuit board, because at this time, the waveform change caused by the signal reflection only ends in a very short time relative to the signal cycle, and will not affect the judgment of the logic level at the sampling point. With the increase of circuit speed, the adverse effects of signal reflection are becoming more and more important. At this time, it is necessary to control the impedance of the signal transmission line to reduce the reflection of the signal. The impedance of the transmission line is related to factors such as line width, layer thickness, dielectric constant of the circuit board, and the structure of the transmission line used (microstrip or stripline). It is cumbersome to calculate manually according to the corresponding formula, which is prone to errors, and it takes many repeated calculations to design a circuit board, so it is really a very troublesome task. But if there is a software that can automatically calculate for you as long as you enter the various design parameters, then your work will not become very easy all of a sudden? This wonderful calculator software is now in front of you! "Electronic Engineer" is dedicated to this full-featured transmission line impedance calculator!
How to use it? I want to use it to calculate the 433.92M antenna, using FR4 board, 1.0 thickness, how to calculate it?
Details
Published on 2011-10-30 18:08
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