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Featured

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

Designing a DAC-controlled, high-side constant current source

December 17, 2020 By Aimee Kalnoskas

by KlausST, supermoderator on EDABoard.com Here I’d like to show how to design a DAC controlled high -side constant current source. Since it is often used as 0..20mA (or 4..20mA) current loop interface, we will focus on the interface requirements. * low speed ( maybe some 10Hz up to some kHz) * high precision * […]

Filed Under: Amplifiers, Analog ICs, FAQ, Featured, Products 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

The basics of FR-4 Printed Circuit Boards

December 14, 2020 By Bill Schweber

Part 1 of this FAQ provided context and background on the PC board, and discussed its first widespread appearance as a phenolic-based board. Part 2 looks at some board issues and the widely used FR-4 PC board substrate. Q: I see the term “solder mask” — what is that? A: Solder mask (also called a […]

Filed Under: 5G, Applications, FAQ, Featured, PCB design Tagged With: FAQ

Step-by-Step PCB Soldering tips for newbies

November 17, 2020 By Scott Thornton

soldering

The traditional, older type of solder is a mixture of lead (Pb) and tin (Sn). This type of (60/40 – Pb/Sn) solder melts at 200°C and is typically made up of 60 percent tin and 40 percent lead. However, lead-free solder is desirable today, in terms of avoiding a toxic environment. Lead-free solder is a […]

Filed Under: FAQ, Featured, PCB design Tagged With: basics, FAQ

Magnetic resonance imaging (MRI), Part 1: How it works

November 10, 2020 By Bill Schweber

Magnetic resonance imaging

The modern MRI system is an amazing blend of diverse technologies, based on the realization that a small but critical aspect of the spin of hydrogen nuclei could be leveraged to provide a safe, non-invasive way to see inside a human body. Magnetic resonance imaging (MRI) is an extraordinarily valuable and vital tool for non-invasive […]

Filed Under: Applications, FAQ, Featured, Medical Tagged With: basics, FAQ

The microstrip antenna, Part 1: Basics

November 6, 2020 By Bill Schweber

The microstrip antenna is a convenient, planar, easy-to-fabricate antenna with some attractive attributes and features, as well as some distinct limitations. The passive antenna is a critical part of any wireless communications link, for both transmit and receive sides. Depending on the application, the same antenna may be used for both roles, or radically different […]

Filed Under: FAQ, Featured Tagged With: FAQ

Filters, Part 1: Analog, switched, and digital filters

November 4, 2020 By Bill Schweber

Filters are essential functions in most circuits and systems; as frequencies extend into the multi-GHz range, surface acoustic wave (SAW) and bulk acoustic wave (BAW) filters are needed to meet the design objectives. An engineer I worked with (and whose name I have forgotten) once remarked to about electronic filters (and he was serious): “like […]

Filed Under: Analog ICs, FAQ, Featured Tagged With: analogdevicesinc, basics, FAQ, qorvo, texasinstrumentsinc

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