Measurement Uncertainties in Outdoor Far-Field Antenna Ranges

Consolidated methodologies have long been established to assess measurement uncertainties in both near-field and compact-range antenna measurements. However, there is currently no analogous methodology for outdoor far-field measurement facilities. This article presents a framework for assessing the measurement uncertainties on an outdoor far‑field elevated range.

IT Server Hardware Compliance, Part 1

This two-part article provides a detailed overview of hardware compliance issues applicable to mainframe and server computers and their subcomponents.

(Re)Discovering the Lost Science of Near-Field Measurements, Part 4

This is the fourth and final article in our series commemorating 70 years since the advent of modern EMC testing. This last installment discusses the theoretical misunderstandings that arise from the substitution of field intensity for antenna-induced concepts and illustrates the practical outcomes from these theoretical mistakes.

(Re)Discovering the Lost Science of Near-Field Measurements, Part 3

This article is the third in a series commemorating 70 years since the advent of modern EMI testing. But this last article is itself divided into multiple parts, due to the topic’s complexity. Unlike the previous two articles, which mainly tracked evolution and explained issues, this series of installments argues that we started off correctly seventy years ago, but then took the wrong fork in the road in 1967.

Pre-Compliance EMI Testing

Pre-compliance testing saves time and costs by detecting potential problems early in the design process. The use of appropriate tools and techniques improves the chances of passing the full compliance test on the first try.

(Re)Discovering the Lost Science of Near-Field Measurements, Part 2

This article is the third in a series commemorating 70 years since the advent of modern EMI testing. But this last article is itself divided into multiple parts, due to the topic’s complexity. Unlike the previous two articles, which mainly tracked evolution and explained issues, this series of installments argues that we started off correctly seventy years ago, but then took the wrong fork in the road in 1967.

In-Situ Radiated Emission Testing of Large Systems Installations

When it comes to in-situ radiated emission measurements, the combination of near- and far-field measurements is often the best approach. Near-field measurements can help identify the sources of emissions, including individual modules or components and their frequency and amplitude characteristics. This information can then be used for far-field measurements. Far-field measurements involve using antennas to measure the radiated noise, with full‑size antennas recommended for measurements between 30 and 200 MHz.