Articles by Patrick Hindle

Most of the MWJ editors and staff arrived in Manchester, UK on Sunday for the largest Microwave Conference and Exhibition in Europe, European Microwave Week. There are about 1400 delegates registered for the technical sessions this year and the content appears to be very good. I sat in on a few sessions ranging from emerging technology such as graphene FETs to more mature high efficiency GaN amplifiers. The exhibition started on Tues and were well attended even through Wed. The Manchester Central facility has a nice layout where all the sessions are very close to the exhibition floor and entrance...

It was recently announced that researchers from Northwestern University and the University of Illinois at Urbana-Champaign have developed “tattoo electronics”. These are wireless electronics so flexible and thin they can be applied to the skin and forgotten. According to the release, the high-performance epidermal electronic system mounts directly onto the skin with the ease, flexibility and comfort of a temporary tattoo. The system could be used for monitoring brain, heart and muscle tissue activity; wound measurement and treatment; biological and chemical sensing; computer gaming and covert communications. The challenge for Huang and his colleagues was to make the thickness...

I like to see the smartphone teardowns for the major new phone introductions to see who the RF/microwave winners are for the high visibility products that will represent significant volume. The latest (long anticipated) smartphone is the Motorola Droid Bionic with market leading specs in many areas. ABI Research (and a few others) have done teardowns and found some interesting findings. According to ABI Research vice president of engineering James Mielke , “Motorola has mixed some of the latest technology with quite a few components now considered the norm and a few that have not been seen in phones for...

IBM is set to publish a paper on a 2 GHz frequency doubler RF circuit in a CMOS-compatible manufacturing process technology at the upcoming International Electron Device Meeting, due to be held in Washington DC, Dec. 5 to 7 . IBM researchers will deliver a paper that is a significant step toward moving graphene from the lab into a manufacturable technology. It will detail how using a 200 mm wafer-scale CMOS-compatible fabrication process can be used to make high-performance graphene FETs and RF passives. A major obstacle with graphene is the difficulty of building a gate dielectric (insulating layer)...

There has been a lot in the news the last few months about LightSquared's proposed new broadband LTE network which is close in frequency to the GPS band and could cause interference in critical areas of navigation systems. LightSquared is seeking FCC approval for 40,000 basestations to support 260 million users across the country establishing a new LTE network. They were approved in Jan 2011 but recent tests have indicated that signals from the network could interfere (jam) nearby GPS receivers so the FCC has said they cannot launch their network until the problems are resolved. LightSquared has indicated they...

The following article was sent to us by Peter (B) Bramham, inventor of the sixth wavelength transformer (I never knew that in his first publication he was mistakenly listed as B. Bramaham so it has taken many years for people to realize it). There have been various references in the last few years to a method of matching transmission lines, variously called the “alternated-line” and “twelfth-wave” and “Bramham’s” transformer. This is shown in the Figure below. It is usually compared with the quarter-wave stepped matching section and the half-wave taper, over which it has several advantages. It is shorter...

My new favorite wireless product - self serve draft beer enabled by RFID technology. Coming soon to a bar near you, self service drafts using an RFID card, computer screen or maybe even your smartphone. According to their website , DraftMagik™ is the first hosted service of its kind to manage and deliver draft beer to the Point-of-Pour™ while also providing an interactive patron experience. The beer can be poured in full-service fashion by the bartender (behind the bar) or in a “pour your own beer” mode by age-verified patrons (in front of the bar at a table or...

According to IDTechEx research in the new report "Wireless Sensor Networks 2011-2021", WSN will grow rapidly from $0.45 billion in 2011 to $2 billion in 2021. These figures refer to WSN defined as wireless mesh networks, i.e. self-healing and self-organizing. Wireless Sensor Networks will eventually enable the automatic monitoring of forest fires, avalanches, hurricanes, failure of country wide utility equipment, traffic, hospitals and much more over wide areas, something previously impossible. It has started already with more humble killer applications such as automating meter readings in buildings, and manufacture and process control automation. The market for non-mesh wireless sensor systems...

Cambridge Consultants has released a report discussing the foremost business opportunities in wireless technologies enabled by White Space frequencies, predicting the development of the first White Space consumer devices in the next five years. The report entitled is the result of a White Space workshop hosted by Cambridge Consultants, and brings together experts from across the wireless and broadcast industries including representatives from Nokia, Samsung, BBC, BSkyB, Neul and CSR to discuss White Space technology. The report views the use of White Space radio as an inevitability, addressing a critical need for redressing methods of spectrum usage and opening up...

I spent the last two days in lovely Long Beach, CA at the IEEE EMC 2011 conference and exhibition. It is a great venue right on the harbor including the nice southern CA weather with the Queen Mary parked right across the harbor. The traffic in the exhibition was average with some busy times in the morning but typically slowing as the day went on. I visited all the microwave companies at the show and have noted below some of the more interesting products I came across. A full report will be coming in a couple of days highlighting all...