Abstract

In this paper, the susceptibility of a microstrip transmission line (MTL) as a simple printed circuit board (PCB) near an interfering antenna is studied using the finite integral technique. Here, the magnitude of transmission coefficient of a two-port network model of the system (|���� 21|) is chosen as the susceptibility criterion of the PCB. The susceptibility is studied for the unshielded and shielded MTL. The effect of different perforation size on the susceptibility of the shielded MTL is examined and it is shown that large apertures can even increase the disagreeable effects of the interfering wave on the MTL at resonance bandwidth of the perforated enclosure. As an important result, it is shown that shielding effectiveness (SE) of an enclosure -which is defined based on plane wave incidence - can be used to predict the susceptibility behavior of the shielded MTL in the vicinity of interference. Simulation results are in good agreement with the measurements performed inside a semi-anechoic chamber.

Highlights

  • Failure and malfunction of electronic systems that are sensitive to electromagnetic disturbances is becoming a serious problem [1]

  • To study the susceptibility of an unshielded and a shielded microstrip transmission line (MTL), we resort to Computer Simulation Technology (CST) simulation data and conduct experimental tests for selected case studies

  • For the shielded cases, enclosure shielding effectiveness (SE) is depicted and it is shown that the susceptibility of a MTL against a near interference source can be predicted by SE of the enclosure

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Summary

Introduction

Failure and malfunction of electronic systems that are sensitive to electromagnetic disturbances is becoming a serious problem [1]. The radiated susceptibility of a printed circuit board (PCB) influenced by an external electromagnetic field can be a criterion to determine the susceptibility of a whole electronic device. Various susceptibility measurements have been performed using a transverse electromagnetic transmission cell (TEM cell) [14], an asymmetric transverse electromagnetic transmission cell (ATEM cell) [15], gigahertz transverse electromagnetic transmission cell (GTEM cell) [3, 16] and reverberating chamber [17] In those measurements, the induced voltage on different parts of PCB is usually defined as the susceptibility of the circuit. The susceptibility of a microstrip transmission line (MTL) as a simple PCB near an interference source is studied.

Problem Description
Results
Validation
Aperture Size
Unshielded MTL Case
Shielded MTL Case
Conclusions
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