Estimation of the Radiated Emission from a Protective Turn of a Meander Line in the Air

Abstract

This paper investigates an algorithm for estimating the radiated emission from transmission lines using quasi-static analysis. The algorithm was tested on a meander line turn of two coupled wires above the ground plane in the air dielectric filling. The dependences of the cross-section parameters and the characteristics of the turn on the temperature at the frequency of 10 GHz were obtained. Examples of the radiation patterns at different frequencies, as well as the current distributions are given. Frequency dependences of the maximum values of the electric field strength obtained by two approaches: quasi-static and electrodynamic are compared. The results were obtained and compared for the meander line with optimal parameters and for the unmatched meander line and compared with the results of a single matched transmission line of one wire over the ground plane and an unmatched one. It is noted that the results of quasi-static and electrodynamic analyses are close at low frequencies but the difference increases at high ones. It was revealed that the meander line structures are able to minimize the radiated emission in the most frequency range except at the resonance frequencies. The tested algorithm gave acceptable results comparing to electrodynamic analysis.