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Jeff Shepard

Metamaterials’ potential for transforming electronics

January 24, 2021 By Jeff Shepard

Metamaterials are engineered/manmade materials with properties not found in nature. The emergence of metamaterials is expected to have a significant impact on a variety of electronics applications. These unnatural materials could have an impact similar to “MEMS” (micro-electromechanical system) technology, with the potential to bring transformational changes. This initial FAQ will briefly look into possible […]

Filed Under: Applications, Automotive, FAQ, Featured Tagged With: FAQ

mmWave antennas and antenna management for 5G

December 23, 2020 By Jeff Shepard

Antennas, antennas, and more antennas are one of the keys to successfully developing 5G new radio (NR) devices employing millimeter wave (mmWave) bandwidths. 5G NR handsets are highly complex devices. They have to handle the new 5G mmWave bands, including 4×4 multiple input and multiple output (MIMO) antennas, 3GPP specified Evolved Universal Terrestrial Radio Access […]

Filed Under: 5G, Applications, FAQ, Featured, RF Equipment, Telecommunications, Wireless Tagged With: FAQ

What is the 5G RF/mmWave signal chain?

December 22, 2020 By Jeff Shepard

mmwave

The 5G RF/mmWave signal chain is expected to be the same as, and different from, the RF signal chain for today’s LTE Advanced devices. 5G consists of two separate frequency bands, FR1 is mostly repurposed LTE bands and FR2 bands are in the mmWave region. As a result, 5G in the FR1 frequencies can use […]

Filed Under: 5G, Applications, FAQ, Featured, RF Equipment, Telecommunications, Wireless Tagged With: FAQ

Basics of mmWave and its applications

December 21, 2020 By Jeff Shepard

The millimeter band spans from 30 to 300 gigahertz (GHz) and lies between the super high frequency band, and the far infrared band, the lower part of which is the terahertz band. Radio waves in this band have wavelengths from ten to one millimeter; thus, radiation in this band is called millimeter waves, sometimes abbreviated […]

Filed Under: 5G, Applications, FAQ, Featured, RF Equipment, Telecommunications, Wireless Tagged With: FAQ

What are RF inductors?

December 16, 2020 By Jeff Shepard

RF inductors

Radio frequency (RF) inductors have several uses and are available in various construction types to suit the performance needs of specific applications. Matching, resonators, and chokes are common uses for inductors in RF circuits. Matching involves eliminating impedance mismatches and minimizing reflection and losses in the lines between circuit blocks such as the antenna and […]

Filed Under: FAQ, Featured, Inductors, RF Equipment Tagged With: FAQ

Class D audio, Gallium-Nitride versus Silicon – Virtual Roundtable (part 2 of 2)

July 13, 2020 By Jeff Shepard

Class D Roundtable

In this second part of EEWorld’s “virtual roundtable” discussion on Class D audio, our panelists delve into the impact that the emergence of gallium-nitride (GaN) is having on Class D designs: Where are silicon devices still dominant? What are the performance benefits of using GaN in Class D amplifiers?  And what are the anticipated future […]

Filed Under: Amplifiers, FAQ, Featured, Products Tagged With: FAQ

Class D audio technology and applications – Virtual Roundtable (part 1 of 2)

July 13, 2020 By Jeff Shepard

The first part of EEWorld’s two-part “virtual roundtable” discussion on Class D audio considers technical challenges and design trade-offs for engineers using Class D audio technology. Joining us for this virtual roundtable are: Joshua LeMaire (JL), Audio Systems Architect at Analog Devices; Steve Colino (SC), Vice President Strategic Technical Sales with Efficient Power Conversion; and […]

Filed Under: Amplifiers, FAQ, Featured, Products Tagged With: FAQ

Rudiments of radiated EMI/EMC

June 27, 2020 By Jeff Shepard

radiated EMI/EMC

Radiated emissions standards are generally more focused on higher-frequency noise sources. At about 30MHz, there is a transition between concern with conducted and radiated emissions. Above that frequency, conducted emissions are not usually a major problem. And below 30MHz, the various interconnects and conductors in most electronic systems are not effective antennas for emitting radiated […]

Filed Under: EMI/RFI, FAQ, Featured, Products Tagged With: FAQ

Conducted and coupled EMI/EMC concepts

June 26, 2020 By Jeff Shepard

EMI/EMC Concepts

In addition to the International Telecommunications Union (discussed in part 1 of this FAQ series), there are several organizations that define and regulate acceptable levels of conducted and radiated emissions from electronic devices. These various agencies have developed numerous standards generally based on the operational environment of the specific device. Effectively managing EMI is a […]

Filed Under: EMI/RFI, FAQ, Featured, Products Tagged With: FAQ

EMI, EMC, EMS, and the ITU

June 24, 2020 By Jeff Shepard

EMI

Controlling electromagnetic interference (EMI), also referred to as radio frequency interference (RFI), and minimizing electromagnetic susceptibility (EMS) are two important aspects of maintaining electromagnetic compatibility (EMC). Ensuring electromagnetic compatibility at a specified level and under specific operating conditions is a common demand in the design of almost all electronic systems. Common terms used when discussing […]

Filed Under: FAQ, Featured Tagged With: FAQ

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