background preloader

Microwave and RF

Facebook Twitter

Verizon plans 5G trial service in 11 cities this year. Lab tests of pre-standard 5G wireless with multi-gigabit speeds are evolving into trial services that users can actually enjoy in the real world – though not necessarily while walking around with a smartphone.

Verizon plans 5G trial service in 11 cities this year

Verizon said Wednesday it will launch pre-commercial 5G service in 11 markets around the U.S. by the middle of this year, joining rival AT&T in aggressively deploying the future technology. At Mobile World Congress in Barcelona next week, carriers are expected to announce more upcoming 5G trials. The Verizon trial, planned for select users in cities including Atlanta, Denver, Miami, and Seattle, will use fixed wireless equipment for home broadband instead of mobile networks for roving devices. But it’s an early use of millimeter-wave frequencies that carriers say they will need for future high-speed mobile broadband. FCC looks to higher frequencies for 5G mobile. Frequencies once considered useless for most mobile services could start showing up on phones and other devices in a few years under a plan by the U.S.

FCC looks to higher frequencies for 5G mobile

Federal Communications Commission. On Thursday, the FCC adopted a proposal to make four high-frequency spectrum bands available for services including mobile voice and data and machine-to-machine communication, or the Internet of Things. Though some of those bands are already used for technologies such as satellite, they have never been approved for regular mobile service. All told, the new bands include 3,850MHz of spectrum, enough to fuel so-called 5G mobile technologies that are expected to include high speed, low latency and support for many more connected devices in crowded areas, according to the FCC. 5G starts with chips like IBM and Ericsson's silicon antenna.

A piece of silicon less than three inches across may speed up the arrival of 5G mobile networks in the next few years.

5G starts with chips like IBM and Ericsson's silicon antenna

IBM Research and Ericsson have developed a compact antenna array that can aim high-frequency radio signals at mobile devices and shoot them farther than they otherwise could reach, the companies said. Silicon integration makes it thin and energy efficient so it’s more commercially viable. Carriers expect 5G networks to deliver cellular data speeds in the gigabits per second, far faster than what today’s LTE services offer.

Touchstone ver2 0. Slaa594a. Homschfss2. Em: talk - Electromagnetics and Microwave Engineering. Single microstrip line. HFE0416 OE. Kinetic Inductance — Communications Engineering. Kinetic inductance originates in the kinetic energy required by each electron that is contributing to a flow of current.

Kinetic Inductance — Communications Engineering

In general the electrons in a solid are moving around continuously, evenly distributed amongst all the possible directions in the crystal. Thus they all posess kinetic energy even when no current flows.When a current flows the electric field adds a small drift velocity component to the whole electon distribution which requries the electron system to acquire kinetic energy: (click for full size image) In a normal or superconducting material this kinetic energy is equvalent mathematically to the energy invested in creating a magnetic field - the energy is effectively stored until the electrons decelerate again. This is often neglected in normal materials as their resistance requires that energy continually be applied to sustain the current due to charge carrier scattering - ohmic resistance. CHAPT 11. n20e. EENG26000 Electronics 2 - Large Signal Amplifier Lab - Part 1 Class A. PA Design Using Harmonic Balance Simulation With Only S-parameters. Polarization Diversity Antennas for Compact Base Stations.

Polarization Diversity Antennas for Compact Base Stations This article describes the use of diversity reception for mobile radio base stations and compares the performance of space and polarization diversity techniques.

Polarization Diversity Antennas for Compact Base Stations

In urban areas polarization diversity offers performance that is generally comparable with that of space diversity. The compact three-antenna system of a polarization diversity base station is much more acceptable as a feature of the urban landscape. Performance trials in rural areas show a less clear picture: While most experimenters report that space diversity is a superior method, others have obtained results favoring polarization diversity. This article discusses possible reasons for these differences. Brian S. As an example, Figure 1 shows a typical graph displaying the way in which the signal received on a base station antenna changes as the mobile user moves along a street. Figure 5 shows typical states of the received polarization. Radio-Electronics.com: resources, analysis & news for electronics engineers. Radio-Electronics.com: resources, analysis & news for electronics engineers. What is MIMO? You might have noticed your new wireless broadband modem for some reason has two ports to plug in an antenna.

What is MIMO?

So which one do I use, and what on earth do I need two for? MIMO - Multiple In Multiple Out In this guide we're going to give you a basic understanding of MIMO technology, hopefully without getting too technical. If you're unfamiliar with how your mobile phone or wireless internet USB stick works you might wish to read this guide first. Since the beginnings of radio technology we've become accustom to a mobile phone or UHF radio transmitting with a single antenna. Understanding Adjacent Channel Power Measurements In Spectrum Analysis.

This article will review adjacent-channel-power (ACP) measurements.

Understanding Adjacent Channel Power Measurements In Spectrum Analysis

ACP is a measure of the nonlinear characteristics of a device under test (DUT) and indicates the amount of spectral regrowth occurring in adjacent channels. This article will explain how the measurement is performed and how to optimize the measurement for speed, repeatability, and dynamic range. MWEE SEP 2015. Comparing Nonlinear Vector Network Analyzer Methodologies. Figure 1 Generalized two-port network.

Comparing Nonlinear Vector Network Analyzer Methodologies

Scattering parameters (S-parameters) were first mentioned in articles and textbooks in the 1950s and 1960s by Matthews, Collins and Kurokawa and popularized by the release of Hewlett Packard’s first network analyzers in the 1960s. Since then, S-parameters have been used to describe the complex characteristics of a network by quantifying the RF power flowing between its ports. S-parameters are essentially the ratio of the reflected and transmitted signal at a given port to the incident signal at a given port under perfect match conditions (see Figure 1). When referring to a transistor, these parameters can be used to calculate return loss, gain and isolation.1 It is important to understand that S-parameters are only truly valid for linear networks, where the characteristics of the network are independent of the level of the signal being driven into the network. Figure 2 Linear operation of a transistor.

AWR Group, NI : Nonlinear Circuit Analysis in Time and Frequency Domain Example: The Forced Van-der-Pol Oscillator : Article. Nonlinear Circuit Analysis in Time and Frequency Domain Example: The Forced Van-der-Pol Oscillator By José Luis Flores, on behalf of AWR Group, NI This application note introduces the technique known as auxiliary generator (AG).

AWR Group, NI : Nonlinear Circuit Analysis in Time and Frequency Domain Example: The Forced Van-der-Pol Oscillator : Article

It is very useful for broadening the set of solutions that can be reproduced from a harmonic-balance (HB) analysis and can help study their stability properties in order to optimize a nonlinear circuit for a desired response, while at the same time avoiding undesired modes such as unwanted oscillations. It is of particular interest for the analysis and design of all kinds of nonlinear circuits, including—but not restricted to—oscillators and power amplifiers. MACOM Designs Ka-Band MMIC Power Amplifier With NI AWR Software. MACOM Designs Ka-Band MMIC Power Amplifier With NI AWR Design Environment Company Profile MACOM Technology Solutions Holdings, Inc.

MACOM Designs Ka-Band MMIC Power Amplifier With NI AWR Software

(NASDAQ: MTSI) (MACOM) is a leading supplier of high performance analog RF, microwave, millimeter wave, and photonic products that enable next-generation Internet and modern battlefield applications. Recognized for its broad catalog portfolio of technologies (GaN, GaAs, InP, SiGe, HMIC and silicon) and products, MACOM serves diverse markets, including high speed optical, satellite, radar, wired and wireless networks, automotive, industrial, medical, and mobile devices.

MACOM designs and manufactures standard and custom devices, integrated circuits, components, modules, and assemblies for customers who demand high performance, quality, and reliability. Millimeter Wave Mobile Communications for 5G Cellular: It Will Work! How to Design an RF Power Amplifier: Class F. How to Design an RF Power Amplifier: Class A, AB and B.

How to Design an RF Power Amplifier: The Basics. How to Use Envelope Tracking to Improve Power Amplifier Efficiency. How to Predict Package and Bondwire Effects on Your RF-Module Designs. Remembering Laser Theory Pioneer Charles Townes. By KATHY PRETZ 30 January 2015 Photo: University of Central Florida. Tutorials. Tutorial: (Time: TBD) Wireless Power Transfer in 21st Century: Technologies Covering Far Field and Near Field - Abstract (Dr. Jenshan Lin, Professor, University of Florida, Gainesville, Florida, USA, Bio) (Dr. Naoki Shinohara, Professor, Kyoto University, Kyoto, Japan, Bio) IEEE New Hampshire Section. These 2 courses were prepared by Dr. Robert M. O'Donnell, a recently retired member of the senior staff at MIT Lincoln Laboratory. 1. Introduction to Radar Systems.

Www.sonnetsoftware.com/support/downloads/techdocs/IMS08_1025_THP1D-01_CoCalOverview.pdf. Literature.cdn.keysight.com/litweb/pdf/5989-9597EN.pdf. Proddownloads.vertmarkets.com.s3.amazonaws.com/download/9f31fd5a/9f31fd5a-1f94-4ad0-b782-44a83261de62/original/an048_momentum_ports_final_140403.pdf. Measuring S-parameters: The First 50 Years. Hyper-threading. Optimal Design of Broadband Microwave Baluns Using Single-Layer Planar Circuit Technology.