Design of filtering cable with defected conductor layer.

Area of Science:

• Electrical Engineering
• Electromagnetics
• Materials Science

Background:

• Traditional electrical cables are primary coupling paths for electromagnetic compatibility (EMC) issues due to a lack of distributed filtering.
• Effective EMC solutions are crucial for reliable operation of interconnected electrical devices in industrial applications.

Purpose of the Study:

• To design and validate an innovative filtering cable with integrated distributed filtering capabilities.
• To address electromagnetic interference (EMI) issues by developing a cable that suppresses signals along its length.

Main Methods:

• Development of a filtering cable incorporating insulated wires coated with a defected conductor layer (DCL).
• Utilized microwave network analysis to model the filtering cable as a two-port network for analyzing cascading characteristics.
• Manufactured a multi-stopband filtering cable using a flexible printed circuit board (FPCB) with a sawtooth dumbbell-shaped DCL and mounted capacitors on a coaxial cable.

Main Results:

• Simulated and measured results confirmed effective suppression of electromagnetic interference within the designated stopband.
• The filtering performance was demonstrated to be adjustable by altering the capacitance values of the mounted components.
• The proposed filtering cable design achieved distributed filtering advantages along its axis.

Conclusions:

• The novel filtering cable design effectively mitigates EMC problems by providing distributed filtering.
• The developed filtering cable offers a tunable solution for electromagnetic interference suppression, adaptable to various application needs.