EMC/EMI

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Most of today’s digital-based products create a large amount of on-board RF harmonic “noise” (EMI). While this digital switching won’t usually bother the digital circuitry itself, that same harmonic energy from digital clocks, high-speed data buses, and especially on-board DC-DC switch-mode power supplies can easily create harmonic interference well into the 600 to 850 MHz cellular phone bands and even as high as 1575 MHz GPS/GNSS bands, causing receiver “desense” (reduced receiver sensitivity).

Investigations of the immunity of integrated circuits (ICs) and printed circuit boards are important for testing components and assemblies during development. With the magnetic field sources of the H4- IC and H5-IC sets, Langer EMV-Technik GmbH offers specialized tools for small-scale injection of burst pulses into ICs, line structures and assemblies.

The principles underlying SI, PI, and EMC are not magic, and they are not about mysterious energy flows in the space between conductors. They are firmly rooted in the fundamental properties of electromagnetic fields, with a 160 year long rich history. Embrace it!

Materials enhancements in two new electrically conductive elastomers from Laird Performance Materials R&F products eliminate the risk of galvanic corrosion and damage from fuel, oils and deicing fluids in military and aerospace applications.

The development of a low-noise emission PCBs is becoming more difficult because of higher integration densities, faster clock cycles, as well as integrating more radiators like wireless capabilities on to the IC. Based on these design challenges, it is essential to get all of the necessary information for the electric parts before they are placed on a customer’s PCB. Read on for advice on how to detect electromagnetic disturbances above ICs.

Many claim that for stripline, it is ok to cross a split power plane, so long as the other adjacent reference plane is solid. Some others claim if there is an adjacent solid reference plane, less than 5mils away under the split, crosstalk will be mitigated. Read on to see an investigation into what really happens when stripline signals cross split power planes.

Keysight Technologies, Inc., announced that Audix, a Taiwanese-based test laboratory, has selected Keysight's 5G solutions to verify safe levels of radio frequency (RF) and microwave emissions from wireless devices.

An EcoTemp Series FoF 619 gasket from Laird Performance Materials features a soft silicone foam core with a low compression force that suppresses electromagnetic interference without damaging sensitive components.

It takes only one rogue voltage wave to kill a PDN in high-speed digital designs. Flat impedance optimization before layout lowers the risk of rogue waves occurring in your design. Heidi Barnes explains how rogue waves occur and addresses how to get the best performance at the lowest cost.

We care about maintaining the same differential impedance for the same reason we care about maintaining the same instantaneous impedance of a single-ended (SE) transmission line: to avoid reflections. SIJ’s EAB member Bert Simonovich explains the fundamentals and why it matters.