CUSTOM-MADE INDOOR SYSTEMS
Build a fully custom-made indoor system that’s easy to set up, tailored to your chamber dimensions, and maximizes test volume without loss of performance.
Tailored and optimized to your chamber
Less than 2 hours to install
No degradation of chamber performances
Typically, the radiating line is terminated against the chamber wall, between the existing absorbers. This type of construction allows to maximize the test volume and is particularly well suited to 5m and 10m compliant chambers, as well as larger chambers.
A Marx generator delivers the required high voltage pulse to the custom radiating line to expose the equipment under test to an electromagnetic field (double exponential waveform) of up to 50 kV/m, with a pulse rise-time and duration in the nanosecond range.
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FAQ
The NEMP-WM system is designed to assess the electromagnetic immunity of electronic equipment and subsystems to a nuclear electromagnetic pulse (NEMP), in accordance with MIL-STD-461 RS105 (editions E, F, G and H) and MIL-STD-464. Unlike transportable systems, it is specifically engineered for permanent or semi-permanent integration into existing or new semi-anechoic EMC chambers.
The radiating line is terminated against the chamber wall. This integration approach is specifically designed to preserve the RF performance of the host chamber — the system introduces no degradation to the chamber’s existing electromagnetic shielding or absorption characteristics. Both the system dimensions and the test volume dimensions are fully tailored to the specific geometry of the chamber.
The system is particularly well suited to 5-meter and 10-meter compliant EMC chambers, as well as larger chambers. By terminating the radiating line against the chamber wall, the design maximizes the usable test volume within the available space, making it an efficient solution for laboratories that need to add NEMP capability without compromising existing test infrastructure.
A Marx generator with an adjustable peaking circuit (or a direct discharge configuration for smaller models) produces a high voltage pulse that propagates along a bounded wave radiating line mounted over a conductive ground plane. The electromagnetic field generated beneath the line is vertically polarized, with a peak electric field strength of at least 50 kV/m at full charging voltage. The pulse waveform is a double exponential with a rise time of 2.3 ns ± 0.5 ns (10–90%) and a duration of 23 ns ± 5 ns (50–50%), operating in TEM mode.
The system is controlled via software through fibre optic links, ensuring complete galvanic isolation between the high-voltage test environment and the measurement and control equipment. The system is also designed for easy assembly and disassembly, allowing it to be reconfigured or removed if required.
The Marx generator operates on a standard single-phase AC supply with a power consumption below 500 VA. The system dimensions are tailored to the host chamber and are defined during the design phase in close collaboration with the customer.
A complete range of accessories is available, including D-dot sensors (SFE3-5G, SGE3-5G) for electric field measurement, B-dot sensors (SFM2G, SGM2G) for magnetic field measurement, baluns (BL3-5G) for free-field sensors, shielded fibre optic links (MOL2000T2 or MOL3000), shielded oscilloscope enclosures (SB3G), and the PULSELab pulse measurement and processing software (lifetime licence for one PC). Field sensor mounting kits, dielectric masts, and coaxial cables are also available.
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