There are no universal rules in shielding techniques; only experience built best practices – as each enclosures content build and function is different – and there are practical methods to simplify this ambiguous design optimization required for meeting the shielding needs dictated by what goes inside those enclosures, as well as what would be in the vicinity of them during use.
Enclosure and component shields can be broadly divided into 3 categories of electric-field shields, magnetic-field shields and completely shielded enclosures. A combination of shielding techniques might be required in the design of enclosures based on circuit and total BOM as well as what could interfere during the product use.
In the industry there many references, tools and guides available to aid our ability to predict the shielding effectiveness of real enclosures, but in reality their practical usefulness is not very high as each design of shielded enclosures requires customization of the solution for each product platform differently. In such a situation, the best shielding strategy depends on the electrical characteristics of the circuit and system being shielded, and platform constraints of size, shape, operating mechanisms, serviceability and costs.
There are no universal rules in part and enclosure shielding techniques; only broad guidelines, and experience built best practices – as each enclosures emi/rfi content build and function is different, and only practical methods and best practices can simplify shielding solutions.
One aspect often missed in this process is the environmental impact of certain shielding solutions, especially when using plastics, conductive paints, coatings and adhesives. Another aspect is how hybrid plastic and metal parts, while giving excellent opportunity in building custom shielding solutions; are being used and their end of life considerations.
Developing experience with practical shielding techniques that address such issues comprehensively helps meet functional needs, compliance requirements, and make for a responsible design practice.
This module mainly focuses on the mechanical product design of shielding solutions using practical examples and real case studies. Aim is to develop knowledge and focus on ways to effectively build shielding techniques expertise.
© Copyright 2018. First Published by Pradeep Chowdhary
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The full course is also available at udemy.com starting Sept, 2018.
Approx. Duration: 2-3 hrs.
Level: Intermediate to Advanced