Electromagnetic Investigation of Crosstalk in Bent Microstrip Lines with Partial and Apertured Shielding: Simulations and Measurements

TL;DR

This study investigates crosstalk in bent microstrip lines with partial shielding using simulations and measurements, revealing complex electromagnetic interactions and predicting behavior with multimodal wave theory.

Contribution

It extends previous work by analyzing the effects of discontinuities and apertures in shields on crosstalk, combining simulations, measurements, and theoretical modeling.

Findings

Discontinuities significantly affect crosstalk levels.

Apertures in shields alter electromagnetic coupling.

Multimodal wave theory effectively predicts crosstalk behavior.

Abstract

This paper presents an electromagnetic investigation of the crosstalk between two bent microstrip lines (MLs) separated by a perforated planar shield. As an extension of our previous study, the effects of various discontinuities in either the MLs or the shield along the coupling path are analyzed through numerical simulations and validated by measurements. The underlying electromagnetic mechanisms are also discussed. Furthermore, multimodal wave theory in a rectangular waveguide is applied to predict crosstalk behavior when the shield contains an aperture. This study aims to conceptually elucidate complex crosstalk phenomena that are difficult to model using circuit theory, and successful predictions of crosstalk behavior are presented for different problem cases.