Application

Electromagnetic field fast pulses measurement

The measurement of fast electromagnetic transients such as NEMP, IEMI or lightning requires realtime sensors with a broadband linear response. B-dot and D-dot derivative field sensors are small broadband antennas designed to measure fast electromagnetic transients up to less than a nanosecond.
The size of the precisely shaped field sensing element defines the sensor transfer function : a larger sensor has a better sensitivity, but a lower frequency limit as its dimensions are not suited for the measurement of short wavelenghts. On the opposite a small sensor has less sensitivity but can measure faster transients.

A typical measurement chain comprises a B-dot or D-dot sensor, a balun, an optical transmission system and an oscilloscope.

The electromagnetic coupling on cables and on electronic circuits may induce quite large measurement errors. The sensor, balun and optical transmitter module are exposed to the electromagnetic transient and shall be well designed and shielded to ensure a precise measurement.

The optical fibre cable can measure up to 1km, what authorises the installation of the measurement receiver (i.e. the oscilloscope) at a long safety distance from the electromagnetic source. If this is not possible, the measurement receiver shall be installed in a shielded enclosure or in a shielded room.

It is not obvious for non-experts to determine the transfer function of a measurement chain made of a derivative sensor, a balun, some attenuators, an optical transmission link and a numerical integration. Montena has developped PULSELab, a software application dedicated to measurement of electric and electromagnetic transients. PULSELab tremendously eases the measurement by taking in account the transfer functions of each componant of the measurement chain and delivering the measured electromagnetic field transient in its native unit (V, A, V/m or A/m).

Montena proposes a full range of measurement equipment and software applications especially designed for the measurement of electromagnetic pulses, as for instance the NEMP.

Related products

Baluns mw-100
Measurements
Products

Baluns

November 14, 2023

B-dot and D-dot field sensors mw-100
Measurements
Products
CUSTOMIZED INDOOR NEMP TEST SYSTEMS  mw-100
EMC
Products
CUSTOMIZED PCI GENERATORS mw-100
EMC
Products

CUSTOMIZED PCI GENERATORS

September 25, 2023

GHz optical links (RF over fiber) mw-100
Measurements
Products
MHz optical links (isolated probe) mw-100
Measurements
Products
NEMP test systems with a GTEM mw-100
EMC
Products

NEMP test systems with a GTEM

September 25, 2023

Passive integrators mw-100
Measurements
Products

Passive integrators

July 17, 2023

PULSE CURRENT INJECTION (PCI) TEST SYSTEMS mw-100
EMC
Products