New Researches in Electronic Defense Systems

New Researches in Electronic Defense Systems

Analysis and measurement of electromagnetic characteristics of conductive polymer on PVC substrate using the waveguide transmission line method

Document Type : Original Article

Authors
میقانی Mighani 1
Ebrahim Chegini 2
1 Electrical Engineering Department, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
2 Electrical Engineering Department, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran.
10.22034/joeds.2025.514295.1089
Abstract
In this paper, using the rectangular waveguide transmission line method, electromagnetic characteristics such as permittivity and conductivity for a conductive polymer deposited on PVC insulator substrate have been measured and extracted. First, the values of the dispersion parameters of the material in the waveguide structure have been measured and then, by analyzing the results from two nonlinear least square methods and a method independent of the calibration accuracy, the electromagnetic characteristics of the material in question have been extracted. The measurement results in the 5 to 15 GHz band are in good agreement with both methods. The results can be used in the construction of flexible metamaterial structures in various applications such as non-planar surfaces that reduce the radar cross-section of targets. In this paper, a new method is introduced that overcomes the problem of having to place the sample exactly in the middle of the waveguide and allows the sample material to be placed anywhere in the rectangular waveguide. This method can simplify the measurement and create a new degree of freedom for measuring the sample at different points in the waveguide.
Keywords
waveguide transmission line method
permittivity
permeability
conductive polymer