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Route de Montena 89
1728 Rossens
Switzerland
Tel. +41 26 411 84 84
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products(at)montena.com

Field sensors

Ground plane field sensors

These derivative field sensors are designed for the measurement of fast pulsed electric or magnetic fields, especially for the MIL-STD-461 RS105 immunity tests. They can be directly connected to a fast oscilloscope through a passive integrator that we also propose as an option. These sensors can also be used for the precise control of the field inside TEM and GTEM cells.

REFERENCE TYPE RISE TIME FREQUENCY RANGE EQUIVALENT AREA
SGE1G D-dot (electric) 320 ps 1 GHz 1 x 10-2
SGE3-5G D-dot (electric) 110 ps 3.5 GHz 1 x 10-3
SGE10G D-dot (electric) 32 ps 10 GHz 1 x 10-4
SGM2G B-dot (magnetic) 160 ps 2.0 GHz 1.1 x 10-4

Free space field sensors

For the measurement in free space, a free space field sensor is necessary. We propose a range of derivative magnetic and electric field sensors up to 10 GHz. They consist of a derivative sensor (B-dot or D-dot) and a balun. For measurements free from interferences, the use of a fibre optic link is recommended.

REFERENCE TYPE                 RISE TIME FREQUENCY RANGE EQUIVALENT AREA
SFE1G D-dot (electric) 320 ps 1.0 GHz 2 x 10-2
SFE3-5G D-dot (electric) 110 ps 3.5 GHz 2 x 10-3
SFE10G D-dot (electric) 32 ps 10 GHz 2 x 10-4
SFM2G B-dot (magnetic) 160 ps 2.0 GHz 2.2 x 10-4

Two ultra-broadband baluns, to be used with the above free space field sensors, are proposed.

ReFeRENCE Type Frequency
range
In / out
impedance
Connectors
BL3-5GBalun500 Hz - 3.5 GHz50 ΩSMA
BL10GBalun100 kHz - 10 GHz50 ΩSMA

Passive integrators

Passive integrators are used to compensate the derivative behaviour of B-dot / D-dot sensors. They have 1 megohm output impedance and should be directly connected to the high impedance input of the measurement device.

ReFeRENCE  Type Cut-off
frequency
In / out
impedance
Connectors
ITR200N-A Passive integrator, T = 200 ns 1.4 GHz 50 Ω / 1 MΩ input N, output BNC
ITR1U2-A Passive integrator, T = 1.2 us 1.0 GHz
ITR12U-A Passive integrator, T = 12 us 200 MHz
ITR200N-S Passive integrator, T = 200 ns 1.4 GHz 50 Ω / 1 MΩ SMA(f) - SMA(m)
ITR1U2-S Passive integrator, T = 1.2 us 1.0 GHz
ITR12U-S Passive integrator, T = 12 us 200 MHz
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