If the impedance is not matched correctly, there are many negative effects in the circuit because of the reflection of signals. The circuit works properly and efficiently if the impedance is matched perfectly. And for higher frequencies the importance of maximum power transfer becomes critical. The impact of a small error in impedance matching results in pulse distortion and reflection of signals.Īs the frequency increases the window of error is decreases. It is also challenging in designing RF and microwave circuits. In ultra-high frequency applications, the impedance matching is a very difficult task for the design engineers. When you designing a PCB for such type of application, you must keep in mind to match the impedance of source and load. The impedance matching is most important in the case of the high speed and high-frequency devices. Step-3 From eq-1, find the required Y to give the selected resonant frequency. Step-2 For given ω 0, Find the required from eq-3. The software kernel is, finally, flexible enough to be extended in the future with grading tools in order to be also used as an examination tool.Step-1 For given R and R’, find the required Q from eq-2. With this philosophy, the presented package is filling the gap between Smith Chart tools and Smith Chart courses. It guides the student towards the optimal solution, by highlighting and detailing the more difficult steps. After a brief introduction to the Smith Chart characteristics, the software is able to deal with different types of impedance matching schemes with lumped and distributed parameters, stubs, serial and parallel, and avoiding the forbidden regions. On the other hand, and as an additional package, we also present a course in impedance matching, based in this tool. It also can graphically display stationary waves of voltage and current, at any point of a loaded lossy transmission line. ), electrical length, phase, attenuation factor, stationary wave ratio (SWR). This way, the students can, on one hand, have a versatile and interactive Smith Chart tool including the managing of the following parameters: impedances/admittances (load, normalized. The software includes, firstly, an independent and basic Smith Chart flexible tool. In this work, we present an evolved Smith chart software code specifically conceived as a computer aid for academic teaching purposes at the graduate or postgraduate level. In the second group we can find Smith Chart based software for different platforms: specifically compiled, addends to Matlab or Excel, or interactive remote flash/Java applications. ![]() The former are mainly developed by institutions reading RF, antenna design and microwave topics. These can be divided into two general groups: web based courses and software tools. With the improvement of the graphical and calculation capabilities of personal computers, different realizations of the Smith chart have appeared. In fact, most of the current findings of internet search engines to the 'Smith Chart' words are still linking to such printed material. Traditionally, the Smith chart has been used in the form of hard-copy diagrams. Due to the huge importance of the Smith Chart usage, it has be included as a topic in the most of the courses related to radio frequency (RF) designs. The Smith Chart allows to graphically solve impedance matching problems, such as the matching of an arbitrary load impedance to a given transmission line or the matching of two lines with different characteristic impedances. Abstract:The Smith Chart has demonstrated for long to be an excellent graphical tool in assisting to the solution of wave-guides and transmission lines problems, by avoiding the need of long and tedious calculation procedures.
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