One of the standard indications of a nearby UFO is the sudden failure of all electrical components:
your cell phone no longer operates and your car coasts
to a stop, often on an isolated country road late at
night. You glance out of the window to see a plane
falling out of the sky. Clearly, an EMP attack of some
kind is underway. Societal collapse is imminent, as the
unfortunate sailors in Figure 1 no doubt discovered.
Not sure why it didn’t make the news: the US election,
Luckily for air travel (and the future of our planet),
manufacturers of military and aviation electronics are
well aware of the risks posed by both alien invaders and
more mundane sources such as lightning strikes, solar
flares, high-power radio transmitters, ESD, and so on.
Depending on the frequency spectrum of the
interference and the coupling mechanism designers
use multiple approaches to mitigate EMC effects,
including careful PCB layout, grounding, shielding, and
filtering. For reducing conducted interference entering
a module, stopping the noise at the point of entry – the
connector – is a very effective approach.
A filter connector adds EMI/RFI suppression
components to a standard connector form factor to
help solve EMC problems. This approach contains the
filter elements within the connector itself, maximizing
functional PCB area and saving weight compared to the
alternative approach: a standard connector plus a PCB-mounted filter.
Electrically, a filter connector has several advantages.
Its metallic shell and ground plate provide a minimum
impedance to ground and higher performance than a
PCB-mounted filter, and provides more consistent pin-to-pin performance.
Filter Connector Construction
Externally, a filter connector looks like the standard
version, but embeds capacitors, ferrite inductors, and
other components into the connector body.
Three types of capacitors are commonly used: a standard
ceramic chip capacitor embedded into the connector
body; a tubular ceramic capacitor around the body of the
The Coming Alien Invasion
By Paul Pickering, Technical Contributor
Figure 1: Why we need filtered connectors: UFO Mothership
arriving over the Bosphorus through an “Interdimensional Portal,”
allegedly in November 2016. (Image Source: section51-ufo.com)
© 2017 Universe Kogaku (America) Inc.
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