IEEE EMC Symposium: Good technology, good products, good gig
IEEE Symposium on EMC, August 17–20, Austin, TX, IEEE EMC Society.
-- Test & Measurement World, 10/1/2009 2:00:00 AM
At the 2009 IEEE EMC Symposium, attendees enjoyed a variety of technical sessions, product exhibits, and music.
In a technical session titled “A Flexible EMI Measurement Sheet to Measure Electric and Magnetic Fields Separately with Distributed Antennas and LSIs,” graduate student N. Masunaga from the University of Tokyo explained the problem of devices such as cellphones having intrasystem emissions problems. Masunaga described a solution to the problem of locating an emission that uses a flexible EMI receiving antenna sheet that wraps around the equipment under test. The sheet consists of a matrix of 4x4 PCBs (printed-circuit boards) with a stretchable interconnect between them. Each PCB consists of four antennas, making for 64 antennas.
Steve Ferguson of Washington Labs gave a demonstration on test setups for MIL-STD-461F Method CS116, which covers conducted susceptibility on cables and power leads. “There's no such thing as a shielded power cable,” he noted, “because when you get to the AC mains, there's no shielding.”
A panel discussion featured engineers from Intertek, Cisco, and Silent Solutions. Topics included “Can design software guarantee EMC compliance?” The panelists agreed that software can help, but it's not perfect because software is written based on assumptions that may not match an application. The panelists also discussed standards and how they reflect new technologies. Silent's Lee Hill noted that “Standards are imperfect and sometimes it's hard to know which standard applies to a product.”
On the exhibit floor
ETS-Lindgren announced the Model 3183 omnidirectional biconical antenna, which is designed for EMI chamber field-uniformity measurements as required for CISPR 16 immunity tests. The antenna works over a frequency range of 1 GHz to 18 GHz.
Teseq introduced several new products in time for this year's Symposium. The PMM 9010 digital EMI receiver uses digital signal processing that functions as a digital IF downconverter and resolution bandwidth filter. The IOB 4000 input/output box lets you monitor and control equipment that's in a chamber during an EMC test. A fiber-optic communications port lets you control the unit from a PC that's outside the test chamber using USB or RS-232. Teseq also introduced the PMM EP-600 and PMM EP-601 active broadband probes for measuring electric field strength inside an EMI test chamber or TEM/GTEM cell.
Rohde & Schwarz introduced the BBA-100 modular broadband amplifier that lets you add amplifier modules when you need to increase power or widen bandwidth (see "Broadband amplifier powers EMI tests").
AR introduced the ATR26M Arrow Series of broadband log-periodic antennas. The antennas have frequency spans from 150 MHz-1 GHz to 26 MHz-6 GHz with maximum power levels from 300 W to 6 kW. Fischer Custom Communications exhibited a susceptibility tester for 1000BaseT Ethernet lines. It can inject transient signals for IEC 1000-4-5 surge-generation requirements. Pearson Electronics displayed current probes for emissions and susceptibility testing.
On stage
On August 18 and 19, the exhibition hall featured a stage where attendees could show off their musical talent in a variety of genres, including rock, blues, jazz, and country. Austin-based Chadd Thomas and the Crazy Kings opened and closed the sessions and backed up several engineer musicians. See "EMC engineers pull off a good gig" for photos and a video of Test & Measurement World's Martin Rowe playing “The Measurement Blues.”
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