Abstract
In this paper we give the new improved analytical method of triple stub tuner for matching the load impedances to provide the maximum power transfer between a generator and a load. The stubs are connected in parallel with the line at the appropriate distances from the load. The characteristic impedances of the transmission line and the stabs are different. The paper points on the determination of the length for the first stub near the load. The limit lengths for the first and the second stub are found for which the matching is possible. The length of the third stub is directly obtained from the matching conditions. Even though there is not the unique solution for the triple stub matching we also shoved the existence of unique solutions under some conditions. The special cases are also treated. The results of this method are verified by those obtained using the Smith chart and there are in exceptionally good agreement. Even though there are not many papers on this subject this work could be useful for engineers, and physicist which work in this domain.
Highlights
In electronics, microwave and RF engineering, the impedance matching is the practice of designing the input impedance of an electrical load or the output impedance of its corresponding signal source to maximize the power transfer or minimize signal reflection from the load
In the case of the single stub the distance from the load and its length are required for given the load impendence as well as the characteristic impedances of the line and the stub
Single stubs can match any load impendence to a transmission line, but the problem is a variable distance between the stab and the load
Summary
Microwave and RF engineering, the impedance matching is the practice of designing the input impedance of an electrical load or the output impedance of its corresponding signal source to maximize the power transfer or minimize signal reflection from the load. For the matching, the stubs are widely used to match any complex load to a transmission line They consist of shorted or opened segments of the line, connected in parallel or in series with the line at the appropriate distances from the load and with their appropriate lengths. In the case of the single stub the distance from the load and its length are required for given the load impendence as well as the characteristic impedances of the line and the stub. A disadvantage of double stubs is that they cannot match all loads To overcome this problem, triple stubs are used, [1]-[11]. These stubs can be connected in parallel or in series with the line as in the case of the double or single stubs. Corresponding author: Slobodan Babic Independent Researcher, 53 Berlioz, 101, H3E 1N2, Montréal, Canada
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