As we noted, the purpose of the spectrum supportability risk assessment is to identify and assess regulatory, technical, and operational spectrum issues with the potential to affect the required operational performance of the candidate system. For example, in addition to determining that a system’s bandwidth requirement complies with an individual nation’s frequency allocation … [Read more...]
The Diagnosis of Under-Performing Semi-Anechoic Chamber Designs #2, and a Report on the Joint Dallas EMC Chapter/Northwest EMC Event
I apologize for the prolonged absence, my career has taken a new path and the preparation for this took up all my spare time. Things are freeing up once more, so I am glad to say I can now return slowly to blog writing.I actually made the time recently to attend a technical presentation on obtaining wireless device approvals, jointly hosted by the Dallas IEEE EMC Chapter and … [Read more...]
SSRA’s Continued…Background on Spectrum Management
To understand Spectrum Supportability Risk Assessments, we need a little background. In the DoD acquisition process, spectrum management usually begins with equipment spectrum certification, a process whereby a system is approved to operate in a particular spectral band. To actually operate the system, spectrum certification must be followed by obtaining specifically assigned … [Read more...]
Spectrum Supportability Risk Assessments (SSRA) – A Review
The first in a series of discussions on a DoD acquisition requirementEarly consideration of spectrum supportability in spectrum dependent (S-D) system acquisitions is a fundamental criterion that must be satisfied before the DoD develops and fields communications-electronics (CE) equipment and related weapons systems. Development or acquisition of systems that meet operational … [Read more...]
What is the future of SAR testing and relevant handset design?
The requirements for SAR levels have remained largely unchanged for many years (requirements depend on the country/region). In fact, the FCC mobile/handset specific regulations are derived from levels determined in the 1960s during early research of radiation hazards.Meanwhile, mobile phone designs advanced at light speed while the systems and methods made to test the SAR of … [Read more...]
The IEEE EMC 2015 Symposium – Why Dresden?
DEAR READERS*, IT’S NOT EVERY DAY you get the country famed for engineering excellence hosting a predominantly US event (the country universally accepted as the economic powerhouse of the world, and famous for her entrepreneurial spirit). So this exceptional event has all the makings for a great meeting of great minds. Germany is the powerhouse that took the EMC industry to … [Read more...]
Applying Stealth Technology to EMC Test Chamber Designs
Tom Mullineaux, President, Lionheart Southwest. Inc Introduction Take a look at any semi-anechoic chamber and they all seem to share the same basic design, that is a long cuboid with six flat faces, five of which are identically clad in RF absorbing materials. However, when utilized for RF immunity testing, the performance of the chamber is pretty much dictated by the … [Read more...]
Assessing Low Frequency Magnetic Field Exposure in Hybrid and Electric Vehicles
Alastair R. Ruddle, Ph.D., and Lester Low, Ph.D. Electrical powertrain technologies are currently of considerable interest within the automotive industry as a way of mitigating some of the inefficiencies of internal combustion engines (ICEs), or even eliminating ICEs completely, as well as eliminating tail-pipe emissions in urban areas. This would offer many important benefits … [Read more...]
CISPR news
Jan SROKA Abstract. There is still big improvement potential in reproducibility by EMC testing. CISPR groups permanently work on it. The document CISPR 11 + A1 in act is issued in 2010. It is already in general maintenance revision which will supersede the existing one in 2015. New regulations included in this document such as: mandatory application of the Common Mode … [Read more...]
Seeding and Harvesting
Mart Coenen For many years national and international norms and standards have been established to make device and product design and manufacturing life easier or at least defined within bounds. In most cases, there is even a life-cycle process for the norms and standards themselves. Old ones fade away and new ones flourish, but some remain everlasting though new insights have … [Read more...]
- « Previous Page
- 1
- …
- 26
- 27
- 28
- 29
- 30
- …
- 71
- Next Page »