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Nowadays, electric machines are often driven by power electronic converters. Even though the use of converters brings with it a variety of advantages, common mode (CM) signals are a frequent problem in many installations. Common mode voltages induced by the converter drive common mode currents damage the motor bearings over time and significantly reduce the lifetime of the drive.

Staying relevant in the CATV market can be challenging with fast-changing standards and regulations. Hybrid fiber coaxial (HFC) networks worldwide are being upgraded to DOCSIS® 3.1 (data over cable service interface specification) with a mid- or high-split to enable increasing data speed and capacity for upstream and downstream traffic.

RF signal generators have been a staple in test and measurement for more than a half century. During that time, they have evolved significantly, but the underlying principles remain the same. This whitepaper provides an overview of the basic construction of RF signal generators and the associated figures of merit.

New wireless devices require fast, accurate, and complex electromagnetic field measurements. Product and test complexity constantly drive increased speed and accuracy in electrical, time, and even spatial domains. The Vector Field Analyzer is a new instrument that connects these domains, meeting the demands of leading-edge development and production testing.

mmWave is the industry’s newest frontier, a free space resource that has triggered a “gold rush” of technology horses and applications riding them. This eBook samples a few of these applications and the challenges facing them. The first article, “Using E-Band for Wideband SatCom: Opportunities and Challenges,” contributed by Hughes Network Systems, describes the requirements for and challenges with E-Band links between the earth and geostationary satellites. The new article “Virtual Cable Calibration for OTA Testing of 5G mmWave Devices” by Rohde & Schwarz describes the concept and how it is used to ensure compliance to the 3GPP standards. The article “6G: Innovating the Future of Wireless Communications,” submitted by Keysight Technologies, surveys a few of the use cases being discussed and the consortiums formed to explore them. Wide bandwidth at sub-THz frequencies is a shared theme. “Satcom, the New mmWave Frontier,” also contributed by Keysight Technologies, returns to mmWave satellite links, specifically the difficulty making accurate and repeatable measurements, particularly OTA. The article “5G Fixed Wireless Access Array and RF Front-End Trade-Offs,” contributed by Qorvo, outlines the design of a fixed wireless access system for a suburban neighborhood, including the design of the phased array and trade-offs among the semiconductor technology options for the front-end module. Concluding the eBook, an article from Qorvo discusses phase noise, an important parameter that can limit the data rate of communications systems.

This eBook explores several important yet often overlooked aspects of the components, testing and requirements for mmWave phased arrays. The first article, from Knowles, discusses filter options and where they best fit in the block diagram. Next, an article from Filtronic discusses two interesting concepts that have garnered considerable investment: low earth orbit (LEO) satellites and high-altitude platform stations (HAPS), the latter encompassing balloons, drones or other platforms that can beam radio signals to the ground below. Measuring the OTA performance of infrastructure and user equipment at mmWave frequencies adds a complex spatial dimension to more traditional “connected” measurements. In addition to test accuracy and repeatability, OTA measurements emphasize measurement speed and the size of the anechoic chamber. To address this complexity, Rohde & Schwarz has developed a compact antenna test range (CATR) —using multiple CATRs that automate OTA measurements requiring multiple angles of arrival. Finally, MilliBox reviews a compact, affordable and flexible chamber solution bridging the gap between traditional mmWave chambers and DIY solutions.

Xilinx's new RFSoC brings a powerful and unique solution for addressing some of the most demanding applications. This paper provides a look at how RFSoC compares to the current trends in A/D and D/A converters and how to get most performance out of this new family of FPGAs.

RF markets are demanding greater performance for wireless links and sensing applications. Active Antenna Systems are the incumbent solution, but come with high cost and complexity. This white paper demonstrates how polymer dielectric 3D printing is used to create higher performance RF devices that can reduce complexity and cost of RF systems.

Richardson RFPD engineers and others have teamed with Analog Devices to introduce a highly-integrated transceiver and have built SoMs and RF front ends to interface with it. Our goal is to provide engineers with small, low-power, high-performance starting points that will reduce design time and the amount of needed resources.

Engineers often need to test the direction finding capabilities of radar warning receivers in the lab. A perfect solution is to use multiple coupled R&S®SMW200A vector signal generators that are phase-coherent and time-synchronized. This setup enables simulation of the angle of arrival (AoA) of radar signals in the lab.