Category Archives : Electromagnetics


ATLOSCon 2015
I’m presenting a talk on “Fields Versus Action-At-A-Distance” at ATLOSCon 2015 in Atlanta this morning. This talk focuses on the conflict between the action-at-a-distance and the field approach to physical understanding from the days of Newton and Descartes to the present. Faraday devised the field concept in reaction to then prevalent […]

Fields Versus Action At A Distance – How Electromagnetics Works


Some distinguished early readers offer enthusiastic reviews for the revised second edition of The Art and Science of Ultrawideband Antennas. “Schantz introduces time domain methods in antenna engineering and microwave techniques, which relate to ultrawideband signals in this expanded second edition. The book is delightfully illuminating, and includes well-researched historical […]

Enthusiastic Reviews for The Art and Science of UWB Antennas



A combined Smith-Carter chart shows the impedance of ideal electric and magnetic dipole fields normalized to free-space impedance. 1
This week, I’ll be presenting my paper on “A simple procedure for measuring gain of very electrically small antennas” at the 2014 Loughborough Antenna and Propagation Conference. Gain measurements of very electrically small antennas (VESAs) present special challenges. These antennas radiate with poor efficiency, and great care is needed to […]

A Simple Procedure for Measuring Gain of Very Electrically Small Antennas


Allerton
Last week, I traveled to the Allerton Park and Retreat Center to present a new paper on fundamental electromagnetic physics at the 2014 Antenna Applications Symposium. My paper, “On Energy Flow in Standing Waves,” analyzes and explains the propagation of energy in a variety of standing waves. The conventional point […]

On Energy Flow in Standing Waves



The Heaviside Memorial Project recently completed their restoration of the memorial Heaviside's
The Heaviside Memorial Project successfully raised funds and completed the restoration of the memorial to Oliver Heaviside and his family in the Paignton Cemetary near Torquay, Devon. Details and additional photos of the unveiling ceremony are available at their web site. The group, organized by the Newcastle Electromagnetics Interest Group […]

A Heaviside Update – Memorial Project to Republish Heaviside Biography


Heaviside Grave 2
He developed the theory of transmission lines, coined such terms as inductance, impedance, and admittance, and rewrote James Clerk Maxwell’s awkwardly expressed equations into the vector form familiar to any student of electromagnetics. Today, Oliver Heaviside’s neglected tombstone is barely legible and is beginning to lean. Chris Spargo and Professor […]

Help Restore the Heaviside Memorial



Time Domain PulsON Logo
Yesterday, UWB pioneer Time Domain announced their acquisition by a private equity group led by Bonaventure Capital and Fidelis Capital. Time Domain did not disclose the terms of the transaction. Additional details are available in a statement from the company and in coverage from the Huntsville Times.

UWB Pioneer Time Domain Acquired


I’ll be presenting my short course on UWB antennas at the IEEE Antennas and Propagation Symposium (APS) in Memphis, TN on Sunday July 6. This is the first time I’ve been back to IEEE APS since 2007, and my short course includes some interesting revisions from the second edition of […]

UWB Antenna Short Course



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Near-field wireless technology is an emerging area of great importance in Radio Frequency Identification (RFID). Specific applications include low frequency (LF) and high frequency (HF) RFID, Near-Field Communications (NFC), Near-Field Electromagnetic Ranging (NFER), and wireless power transfer. This talk discusses the origins of near-field wireless, surveys applications, presents near-field links […]

Near-Field Wireless Technology – Video Available





The Orange County Convention Center in Orlando housed the 2014 RFID Journal Live Tradeshow. 1
The last couple of weeks were action packed. Two weeks ago, I spoke at the Texas Wireless and Microwave Circuits and System Symposium at Baylor University in Waco (see my post “Demystifying Electromagnetic Superposition“). Last week, I joined the Q-Track team in Orlando for RFID Journal Live, our industry’s leading […]

Q-Track Wins “Coolest Demo” Award at RFID Journal Live



IEEE Logo 3 1
The Q-Track gang is in Orlando, Florida this week  for RFID Journal-LIVE, the world’s premier conference and exhibition focused on radio frequency identification (RFID) and its many business applications. The tradeshow is underway April 8-10, 2014, at the Orange County Convention Center, located in Orlando, Florida. More about that later. […]

Tutorial: Near-Field Wireless Technology


By courtesy and permission of Jollie Primitives. Click to order your own. 1
This afternoon I will be presenting an invited talk at the 2014 Texas Symposium on Wireless & Microwave Circuits & Systems at Baylor University in Waco, Texas. In my talk, Demystifying Electromagnetic Superposition (slides), I will examine the interesting behavior of electromagnetic waves when they superimpose or interfere with each […]

Demystifying Electromagnetic Superposition



Blogging has been taking a back seat to everything else in my life, lately. This week, though, I have a variety of interesting and exciting developments to share. Today’s news is an update on the indoor location company I co-founded, Q-Track. The good news began a few month ago in […]

What’s New at Q-Track




Here’s more good press for NFER® RTLS pioneer, Q-Track. Nuclear Engineering International reports: Workers in six US nuclear power plants are being trained in a virtual radiation environment so that they can develop skills to keep radiation exposures low. The Q-Track radiation worker training system combines a software program that can […]

Q-Track NFER® RTLS Enables “Virtual Radiation”


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Employing Q-Track’s patented Near-Field Electromagnetic Ranging (NFER®) technology, Collision Avoidance Non-Line-of-Sight (CANLOS™) systems allow robots to detect and avoid colliding with their human co-workers even when when direct line-of-sight may be blocked. NFER® signals use low frequencies that penetrate better and diffract around obstructions that may block conventional RF and […]

Q-Track’s NFER® RTLS: Protecting Humans From Their Robotic Co-Workers



Q-Track Booth
Q-Track’s A-Team traveled to upstate New York the other day to show off NFER RTLS for tactical training at Tactical Conference 2012. Here’s the press release: May 01, 2012 –  Verona, NY – Q-Track Corporation, the pioneer in Near-Field Electromagnetic Ranging, will demonstrate NFER Real-Time Location Systems (RTLS) products in and […]

Q-Track Demonstrates NFER RTLS for Training at Tactical Conference ‘12


Michael Faraday 1
Any student of electromagnetics knows the story – Michael Faraday devised the ingenious concept that electric and magnetic effects were due to “fields” pervading space. Applying this simple concept, he was able to devise and demonstrate the phenomenon of induction, discovering the physics that gives rise to electric motors and […]

Faraday’s Secret 1832 Letter Reveals Electromagnetic Waves Prediction



Today's Google Doodle honors Heinrich Hertz.
Today’s Google Doodle honors Heinrich Hertz (1857-1893), discoverer of radio waves, on the 155th anniversary of his birth. Heinrich Hertz was not the first to experiment with radio waves. Contemporaries such as Charles Hughes and Oliver Lodge performed similar work in parallel. What set Hertz apart, however, was his tenacity […]

Google Doodle Honors Heinrich Hertz


I’m passing on another press release from my company, Q-Track. The Q-Track team at I/ITSEC is having a great show and wanted to share this video, filmed yesterday, of their live demonstration. ORLANDO, FL – December 1, 2011. Q-Track’s NFER Real-Time Location System (RTLS) demonstration wowed attendees during the first […]

Q-Track RTLS Demo Wows I/ITSEC Attendees



Seu browser não suporta iframes. Next-RF’s Model 310C UWB Planar Horn Antenna is now available from Amazon. This ultra-wideband (UWB) antenna approximates a constant aperture. Thus, the time domain voltage signal closely approximates the time domain behavior of the incident fields themselves. In addition to use as a UWB impulse […]

Now Available from Amazon: UWB Planar Horn Antenna


Q-Track is demonstrating NFER® RTLS in and around Booth 2737 at I/ITSEC 2011, the world's premier modeling, simulation, and training conference, in Orlando, FL today through December 1. 2
Today, I’m passing along a press release from my company, Q-Track. Swing by Booth 2737 at I/ITSEC in Orlando this week to see a demonstration of NFER RTLS. ORLANDO, FL – November 28, 2011. Q-Track Corporation, the pioneer in Near-Field Electromagnetic Ranging, will be demonstrating NFER Real-Time Location Systems (RTLS) […]

Q-Track to Demonstrate MOUT RTLS Training System at I/ITSEC