As more consumer and commercial products are introduced with High-Definition Multimedia Interface (HDMI) cable connections, the resulting EMI issues related to HDMI cable emissions have continued to be problematic for product designers and EMC engineers. It is very common to have one, or more, added HDMI cables cause a product to fail the radiated emissions (RE) test. The … [Read more...]
Introducing Repairable 67 GHz, 1.85mm Cables
The 1.85mm Vector and Brute cables offer best-in-class performance through robust performance, high compression resistance (800 lbs/500 lbs), excellent phase and amplitude stability, high Vp of .83 for thermal stability and unsurpassed price/performance ratio. Whether you are using a VNA or need cables for general test, Velocity Microwave has a solution for your … [Read more...]
High-Frequency Coaxial RF Edge-Mount PCB Connectors Available
SV Microwave / Amphenol has high-frequency coaxial RF edge-mount PCB connectors now available on their site. Includes features and benefits like: High-frequency, coaxial, edge-mount connectors for any PCB thickness Series: mmWave, SMP, SMPM, SMPS, and SMA Customized PCB footprint design through simulation optimization Pre-tinning available COTS versions … [Read more...]
New Custom Rapid Response Cable Assemblies
SV Microwave / Amphenol has developed a new way to order custom coaxial cables quickly via their website. This could be convenient for test labs and manufacturers with in-house testing facilities. Check out how to order one yourself here. … [Read more...]
ESD Effects of Digital ICs
One issue I see fairly often with unshielded consumer or commercial products is CPU resets during periods of immunity testing, such as during electrostatic discharge (ESD) testing. Untreated, this can lead to field failures and associated customer satisfaction issues. The remedy is usually quite simple and IC manufacturers even mention the solution, but it’s usually buried … [Read more...]
Gaps In Return Planes – Bad News for EMI
Currently, there is an ongoing discussion among SI and EMC engineers on the fine points of PC board design for best signal integrity and EMI performance. Among the topics it seems designing in gaps or slits in ground return planes always comes up. Gaps can also occur mistakenly due to the addition of some connectors or other object that creates gaps in the copper. In fact, … [Read more...]
Measuring Cable Resonances With A Comb Generator
(October 28, 2016) Cables are one of the key metallic structures on a product that can act as an antenna and couple energy, causing radiated emissions and possible compliance test failures. This has been discussed extensively in the literature on product design for EMI compliance. In many cases, they can resonate at their half-wave frequency and actually amplify any harmonic … [Read more...]
Metalized Fabric Over Elastomeric Gaskets Offered
Tech-Etch has been offering Metalized Fabric over Elastomer Gaskets as standard strips with seven different profiles, Standard D-Connectors to shield most 9-pin through 50-pin connectors, and custom configurations die cut to customer specifications. Strips come in many standard sizes for the following profiles: Square, Rectangular, Flat, D, C-Fold, Knife-Edge, and … [Read more...]
Coaxial and Board-Mounted EMI Filters Available
API Technologies offers a wide range of EMI filters focused on medical product applications. The range of filters includes surface mount, low pass feed-through, filtered terminal blocks, filtered connectors, as well as gaskets and shielding products. … [Read more...]
Blog Post – DC-DC Converter Noise Evaluation
By Kenneth Wyatt More of my clients are starting to use small third-party DC-DC converters to provide the multitude of voltages required for today’s processor and DDR RAM ICs. While these are convenient to drop onto a circuit board, they can be quite a source of radiated and conducted emissions – especially those that switch in the MHz range... To read the full blog post, … [Read more...]
