Dr. Diethard Hansen has been responsible for some path-breaking research and development in the field of Electromagnetic Compatibility (EMC). Here is a look at some of them...
Investigation into the impact of EMI/NEMP on the Swiss Communications & Transportation Systems (1988)
 Horizontal polarized dipole (HPD, 50kV/m) simulator with NEMP generator, locomotive and movable, shielded instrument cabinet
For the first time, the impact of nuclear electromagnetic pulse on transportation and radio systems, relevant for European conditions, was analyzed. It was proven that hardening was economically viable.
1987/88 online literature "Hansen" in Dr.C.E.Baum Notes
Conceptualization and Development of Asymmetrical GTEM Cell, a EMC/NEMP test facility (1989)
 The 1st prototype of a GTEM® 1500 test cell for EMC radiated emissions and immunity.
For the first time in EMC/NEMP, the GTEM expanded the useable frequency range of a large TEM test device far into the GHz range. Being compact, efficient and self contained, the GTEM cells prove to be in good correlation with OATS/absorber chamber standard radiated tests. Fast time domain and high frequency domain testing was more economical.
Invention and development of a symmetrical EURO TEM Cell, an advanced EMC test facility. (1998)
 Prototype of small EUROTEM® Test Cell (test space 500mm) for sensor calibrations.
While the GTEM cell development was a revolution in testing of smaller devices over a decade, a new, further improved concept was now available. In contrast to only absorber lining the termination, the new symmetrical device used a fully anechoic room. E-field polarity could now be simply switched from horizontal to vertical without the complicated rotation algorithm in a GTEM, where products would have had to go through upside down positions.
 An ordinary turntable does the EUT positioning in a EUROTEM. TEM devices recently received recognition by the basic standard IEC 61000-4-20
Prototype of a large EUROTEM test facility in a fully anechoic room for telecom rack testing
Recent R&D projects that include Power Line Communications (PLC, PLT, BPL)PLC in the EU attempts to use the unshielded domestic low voltage power grid (230V/50Hz) for transmitting high speed digital signals over the mains with Mbit/s in homes. The idea is to create another, simple broadband internet access media for the public. RF leakage and radiated emissions, however can cause serious problems with EMI for well established, important radio services. Extensive know-how in EMC Measurements, R&D and in EMC standardization contributed to Diethard Hansen becoming the external chairman of the PLC advisory committee (ATRT WG PLC) of the German Regulation Authorities RegTP. This is a responsibility that Dr. Hansen has undertaken from the late 90's.
US 2003 Literature1 US 2003 Literature2 US 2001 Literature3
Online literature (BPL)
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