Articles

Aperture Tuning, the Best Technique for Closed Loop Tuning

Paul Tornatta, VP RF Systems and Antenna Engineering
Cavendish Kinetics, Inc.

Modern Smart Phones are packed with useful features. In order to maximize the user experience, the performance of the radio must be optimized at all times. Antenna Aperture Tuning is a method used by all top-tier Smart Phone makers for optimizing the antenna performance across several frequency bands of operation. The next step in antenna optimization is closed loop tuning. In closed loop tuning, some performance metric (often antenna reflection coefficient) is used to change the response of the RF front-end to dynamically compensate for variations in usage including compensating for the detuning effects of the users head and hands during phone operation.  Dynamic tuning to compensate for head and hand effects is not a new concept. Most RF engineers believe the best way to implement closed loop tuning is with an impedance matching network, but if aperture tuning, not impedance matching, is the best way to tune an antenna, then why not use aperture tuning for closed loop tuning as well? Continue reading

Sinclair Technologies Helps NAV Canada Safely Move Millions of Aircraft

Michel Gagnon, Sinclair Technologies
Tammy St-Amand, NAV Canada

Who is NAV Canada?
NAV CANADA is Canada’s Air Navigation Service Provider (ANSP) managing 12 million aircraft movements a year for 40,000 customers over 18 million square kilometers. They are the world’s second-largest ANSP by traffic volume. Created in 1996 through the combined efforts of commercial air carriers, general aviation, the Government of Canada, as well as their employees and their unions, NAV CANADA is the world’s first fully privatized civil air navigation service provider. Continue reading

The Ongoing IoT Conundrum: Who’s Going to Pay?

Dermot O’Shea, Co-Founder and Joint CEO 
Taoglas

The adoption of Internet of Things (IoT) technologies has certainly been on the rise, and just about every industry—in every corner of the globe—has made strides forward with IoT projects. We’re seeing Smart City initiatives pop up around the world, Smart Metering projects mandated by governments, healthcare initiatives developed that drive adoption of IoT devices, and so on. Continue reading

High Density, Low Profile Connectors Benefit from New Breed of Spring-Loaded Pin

Plastronics

For decades, connector manufacturers have relied on traditional spring-loaded, or pogo-style pins, to provide highly compliant, reliable interconnections. Although expensive, these highly compliant pins are used to connect batteries to docking stations, antennas to PCBs, for rugged, high-shock and vibration applications, or to compensate for floating heights and uneven mating surfaces. Continue reading

Spotlight on New HyperStacking Ground Penetrating Radar Technology

Jeffrey Feigin, PhD, GSSI

Ground-penetrating radar (GPR) is an electromagnetic imaging technique that allows users to see beneath the surface through soil, pavement, concrete, ice, and even water. GPR is widely used for utility mapping, concrete inspection, forensic investigations, geological surveys, and archaeology. Regulatory agencies place stringent power emission limits on GPR equipment to prevent disruption to other technologies that share the same spectra, for example, wireless communications and global positioning systems.  Continue reading

5G Cellular Electromagnetic Window Considerations

D. J. Kozakoff, C. Corallo, D. Petra, and W. Roovers

Every pole mounted cellular antenna uses a RF transparent electromagnetic window to protect the antenna from the environment. For 5G and the migration to much higher cellular frequencies and extremely broadband signals, many materials used at current frequencies cannot provide adequate low loss and broad bandwidth performance. This article discusses some issues and tradeoffs. Continue reading

Sharing an Antenna Doesn’t Mean Giving up Control

Mohamed Nadder Hamdy,  Director of Technical Sales 
CommScope

The practice of network sharing has been a recurring topic of interest in the wireless industry since it was introduced in the early 2000′s. The first network sharing agreements were conceived as a way to help European wireless operators offset the high cost of launching 3G service in hard-to-cover areas. Despite the potential for savings, the initial surge of interest in network sharing quickly declined as most operators opted to build their own 3G networks. Continue reading