Abstract
In this paper, the three-dimensional (3-D) Smith chart has been modeled with ANN to be utilized on the microwave circuitry with purpose of enough accuracy having fast and practical in-use. Firstly the theory of the 3-D Smith chart has been explained. Then the transformation of conventional 2-D Smith chart to 3-D spherical Smith chart using ANNs has been proposed. Results have shown that proposed ANN structure learns all possible points on the surface of the spherical 3-D Smith chart with enough approximation and accuracy. Consequently, a "Neural 3-D Smith Chart" has been formed by using the ANNs in the simple MLPNN structures as the nonlinear learning machines from the input space to the output space. Ill. 9, bibl. 13, tabl. 1 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.114.8.700
Highlights
Smith chart is a graphical tool for solving transmission line problems which was developed by P
Analysis and design of microwave circuits are generally tedious with their complicated equations, Smith chart provides a very useful graphical tool or calculator which was improved by computer programmers for these types of the problems with its numerous applications
The proposed two hidden layer Multilayer Perceptron Neural Network (MLPNN) has provided performance with the minimum training error which has been achieved after nearly 400 epochs as 2.45x10-5 and a) average testing error as 4.45x10-4
Summary
Smith chart is a graphical tool for solving transmission line problems which was developed by P. Every book related on microwave theory or engineering field has had detailed information, solved problems and various applications after its ease of utilization improved on transmission lines [2]. Analysis and design of microwave circuits are generally tedious with their complicated equations, Smith chart provides a very useful graphical tool or calculator which was improved by computer programmers for these types of the problems with its numerous applications. A microwave engineer having whole concept of the Smith chart in his mind has an ability to picture probable matching solutions for complex problems which includes extensive computation cost
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