EMC TESTING & ANALYSIS: PCB DESIGN
Clips and solderless shielding cans make board prototyping easier
Jonathan Newell visited Harwin to discuss the increasing importance of factoring EMC into PCB design at an early stage
across the board F
romits recently expanded factory in the north Portsmouth suburb of Farlington,Harwin has been supplying its own designed and built cables and PCB hardware
since well before the advent of themodern computing era. Since the early days of the company’s
‘
formation, the industry has hurtled along a path of inexorableminiaturisation accompanied by increasing densities and higher demands on connectivity and robust reliability. Staying agile in such an environment is
It is
certainly not a black art but it’s very
complex Product strategy manager Robert John Webber
’
vital for remaining competitive and Harwin has the agility and foresight to make changes to its products and manufacturing facilities to stay ahead of the next wave of change in the electronics sector. To find outmore about the latest
products and the company’s approach to EMC, I visited the Portsmouth factory and spoke to EMC product strategymanager, Robert JohnWebber.
complex. The laws of physicsmake it very predictable of course but there are a lot of parameters to consider and there is an art to this,” explainsWebber. He went on to explain that good design
fromthe start is essential and although there is no substitute for thorough testing, careful thought and experimentation at the design stage can preventmany problems. “If you think of the board layout from
the very start and how it will affect EMC performance, then the design will be less iterative,” saysWebber. Going through a process of re-designing
August 2017 /// Environmental Engineering /// 31
EMC
NAVIGATING EMC COMPLEXITY ElectroMagnetic Compatibility (EMC) has never been the easiest branch of electrical engineering and is becomingmore complicated as circuitry becomesmore densely populated, frequencies become higher along wires and antennas proliferate. I askedWebber whether it was governed by very precise rules or whether it was something of a black art. “It certainly isn’t a black art but it’s very
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