What is a decibel and how should we use it in our calculations? Decibels are found everywhere, including power levels, voltages, reflection coefficients, noise figures, field strengths, and more. Yet, many calculations using decibels leave even experienced engineers scratching their heads. This application note is intended as a refresher on the subject of decibels.
Power Amplifier with Unrivaled Size and Power Advantages: Model 2170
This amplifier covers the 1 to 3 GHz frequency range while delivering 1 kW of broadband output power in a 5U, air-cooled chassis. Its performance and size make it an ideal solution for test and measurement, electronic warfare, and communications applications. More specifically, it’s designed for octave bandwidth high power CW, modulated, and pulse applications.
Thin-Film Hybrid Oxide-Organic Microprocessor
Holst Centre, imec and their partner Evonik have realized a general-purpose 8-bit microprocessor, manufactured using complementary thin-film transistors (TFTs) processed at temperatures compatible with plastic foil substrates (250°C).
Wireless Brain Sensor Could Pave Way For Improved Neuroprosthetics
A wireless system for brain studies now enables the remote acquisition of high-fidelity neural data from animal models. Previously, wires and cables constrained these types of experiments to artificial scenarios. With the new system, neural data can be obtained during normal, unrehearsed activities.
Logarithmic Amplifier/Detector Characterization Utilizing A Modern Vector Network Analyzer
When characterizing the log amp/detector, a number of RF measurements must be performed. At minimum, those tests include input (S11) match, output (S22) match, and output log conformance. Log detector errors include DC output bias and slope error. Limited outputs must also be measured for absolute power and input threshold. While these tests many appear straightforward, the conventional test systems typically used to perform them often face a number of limitations. Fortunately, many of these limitations can now be overcome with just a single instrument—a modern vector network analyzer (VNA).
Brisbane, California startup Fighting Walrus recently developed its Fighting Walrus Radio – a 900 MHz telemetry radio used in conjunction with iPhones or iPads in order to effectively control the flight of commercially available drones. This case study explains how Proto Labs helped them determine that a magnesium thixomolding process was the most ideal solution in developing the radio’s antenna housing and clamps.
Designing in high speed analog signal chains can be challenging because there are so many noise sources to consider. In this article, the most common outside noise sources are described, along with how they influence the total dynamic system performance of a high speed signal chain. The article also provides some analog and digital tricks that can be employed to further increase the signal-to-noise ratio in your next design.
To get useful results during EM analysis, answers must be accurate. Errors in impedances of even a few tenths of an Ohm will be disastrous. Those who use an EM port calibration that is dependent on the traditional definitions of Z0 will have that magnitude of error before they even start. In the final article of his four-part series, James Rautio of Sonnet Software addresses the problems that arise during EM port calibration and discusses a powerful technique for tuning filters in just a few minutes with nearly full EM accuracy.
Traditionally, wireless communication has been limited in its capacity to transport gigabit quantities of data due to bandwidth limitations set by the FCC, making fiber-optics a relevant alternative for communication systems. That all changed, however, with the opening of the 71 to 76 and the 81 the 86 GHz bands — referred to as the “E-Band” range of millimeter wave (MMW) frequencies. This article discusses the advantages that MMW communication systems have over their fiber-optic counterparts.
FROM THE EDITOR'S DESK
Amazon’s New Smartphone Boasts High-End RF And Imaging Components
On July 25, Amazon released its first smartphone, and it didn’t take long for the internal components of the device to get leaked.
4 Electronic Design Requirements Of The System-Integrated Soldier
Perhaps most famously portrayed in Robert Heinlein’s Starship Troopers (1959), the idea of the “future soldier” has been around for decades. As rehashed in countless science fiction films and video games, the stereotypical future soldier is equipped with a protective exoskeleton, enhanced sensory equipment, seamless communication systems, and advanced weaponry. While the concept once seemed implausible, there are many real-world projects under way focused on realizing those seemingly fictitious warfighter capabilities — by integrating a plethora of diverse electronic subsystems into a cohesively operational suit.
7 Noteworthy Technologies From IMS2014
At the 2014 IEEE MTT International Microwave Symposium earlier this month, I had the opportunity to speak with the event’s general chair, Dr. Larry Dunleavy, about the state of the RF and microwave design industry. While he acknowledged that it is a time of relative uncertainty — due in large part to constrained military budgets and conservative fiscal forecasts for 2014 — he also pointed out that there are plenty of emerging markets where RF and microwave technology is making a significant impact. With the Internet of Things (IoT) driving innovation in burgeoning markets like automotive and healthcare and the development of 5G pushing wireless technology to further heights, there was good reason for nearly 600 companies to flock to the IMS2014 exhibition in Tampa, Fla.
GaAs And GaN Capabilities On Display At Farnborough
The UK was host to air shows recently with the annual Royal International Air Tattoo (RIAT) and the biennial Farnborough International AirShow (FIA) 2014. I had the opportunity to attend a Lockheed Martin F-35/F-16 preview day held at RAF Fairford, the venue for RIAT, as well as taking a few days to attend FIA 2014.
Lockheed Martin Previews F-35 Lightning II "Fighter Of The Future"
The U.K. was host to air shows recently with the annual Royal International Air Tattoo (RIAT) and the biennial Farnborough International AirShow (FIA) 2014. In this article, Asif Anwar from Strategy Analytics describes his experience at the Lockheed Martin F-35/F-16 preview day held at RAF Fairford, the venue for RIAT, and provides an overview of the new capabilities of each aircraft.
EM De-Embedding Magic – Part 3: What Could Possibly Go Wrong?
In Part 1, I described the EM analysis port calibration algorithm that I developed almost 30 years ago and has been in use in Sonnet ever since. At first glance, it might seem like the technique can be applied only to “lonely” ports — ports that have no interaction or coupling with any other nearby ports. In Part 2, I showed how the algorithm can be easily extended to calibrate and de-embed as many tightly coupled ports as needed. Yes, a couple equations are needed, but once you get familiar with them, the process is really easy to do. Everything works so well, one might think that nothing could possibly go wrong.
RF GLOBALNET WELCOMES OUR NEWEST SUPPLIER
Atlanta Micro, Inc was founded in 2011 with the purpose of designing and manufacturing high performance RF and Microwave products for demanding customer applications. The company is based in Alpharetta, Georgia, just north of Atlanta. Our executives possess over 40 years of experience designing state‑of‑the‑art components, receivers, transceivers and systems for the military, government agencies and the test equipment community. Atlanta Micro is focused on providing best‑in‑class broadband RF solutions meeting stringent specifications while offering reduced size, weight and power consumption necessary for portable and low power platforms. Our products are designed to meet customer needs that have been identified through our extensive experience.
CST WEBINAR SERIES 2014 – EXPLORING EM SIMULATION
The CST Webinar Series 2014 offers 12 free webinars that provide an insight into EM simulation and techniques to shorten the design cycle and reduce the number of costly prototypes required. No matter your level of experience, whichever webinar you attend, we think you'll benefit. Registrations for coming webinars are open and aired webinars are now available on demand. Learn more.
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ELECTRONIC MILITARY & DEFENSE MAGAZINE
Electronic Military & Defense was developed as a resource for engineers, program managers, project managers, and other professionals involved in the design and development of electronic and electro-optic systems for a wide range of defense and aerospace applications. Check out the digital edition of our latest issue for exclusive editorial on wearable antennas for military applications, countering EMI threats, biological and chemical threat detection, advances in optical sensing, and more.
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Rogers Corporation Signs Definitive Agreement To Acquire Arlon, LLC
Rogers, Connecticut: Rogers Corporation (“Rogers” or the “Company”), a global leader in engineered materials solutions, announced recently it has signed a definitive agreement to acquire Arlon, LLC, currently owned by Handy & Harman Ltd., for $157M, subject to closing and post-closing adjustments.
Microwave Imaging System Could Improve Breast Cancer Screening
As a possible complement to routine mammography, a new microwave imaging system may be able to detect whether a lump is benign or malignant. The system provides 3D reconstructions of tissue, which are obtained without compressing the breast.
GPS Modernization Advances As 8th Boeing GPS IIF Becomes Active
The eighth Boeing Global Positioning System IIF satellite has completed on-orbit checkout and joined the active 31-satellite constellation, helping the U.S. Air Force continue modernizing the network that millions of people worldwide use.
Peregrine Upgrades Its Industry-Leading, Radiation-Hardened UltraCMOS® Integer-N PLL
Peregrine Semiconductor Corp., founder of RF SOI (silicon on insulator) and pioneer of advanced RF solutions, announces the UltraCMOS® PE97240, an integer-N phase-locked loop (PLL) that offers superior phase noise performance for signal precision and frequency stability.
NRL Researchers Demo TREC Ship-To-Shore Data Link
Scientists at the U.S. Naval Research Laboratory (NRL) along with Mercury Continuity (MC) have successfully demonstrated the Tactical Reachback Extended Communications (TREC) system in the port of Miami.
IRG Members To Benefit From Eutelsat’s GSM Demodulation Tool
Members of the Satellite Interference Reduction Group (IRG) are to benefit from a new GSM Demodulation Tool developed by Eutelsat, and being offered to all IRG members including new members joining throughout 2015.
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