Calculating characteristic impedance without using symmetricity of rectangular coaxial line

• Main Authors: Africa, Aaron Don M., Bulda, Lourdes Racielle, Del Rosario, Emmanuel, Marasigan, Matthew Zandrick, Navarro, Isabel F.
• Format: text
• Published: Animo Repository 2019
• Subjects: Impedance (Electricity); Coaxial cables; Electrical and Electronics
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/2601
• Institution: De La Salle University

A transmission line is used for transmitting electrical power between a transmitter to a receiver, load, or various distribution sections. Its characteristic impedance is one of its key parameters as it will deduce whether the maximum power is transferred to its other end. In this paper, the characteristic impedance was calculated without the use of symmetricity. As this has consistently been the method being used in computing, this study focused on being able to achieve the same output but through a different procedure. The code for this paper was done in the software called MATLAB. The program then works by simply being executed and the processes involved in producing the desired output such as the predefined dimensions of the coaxial transmission line, the established dimensions of the inner and outer conductors as well as the assigned voltages for the outer boundaries of the system, the node voltages, and the inner voltage of the conductors. The finite difference scheme will then be applied in order to calculate the convergence of the solution. The potential difference of the coaxial transmission line is then calculated by calculating the charge enclosed by the areas of the inner and outer conductors before finally calculating the characteristic impedance of the system. The results obtained from the simulation were compared with the results from one of the literature used. The output had a considerable value of percentage error which is 28.93%. Nonetheless, the conceived output was very close to the accurate answer. © 2019, World Academy of Research in Science and Engineering. All rights reserved.