MOL2000T – MOL3000

BALUNS

Small and well-shielded hardware modules designed to combine the signals received from both sensing elements of the free field derivative sensors to one single signal output

Very broadband flat response

Up to 10 GHZ bandwidth

Strong shielded modules

You may use Montena’s passive integrators are used to compensate the derivative behavior of B-dot, D-dot and V-dot sensors. They have 1 megohm output impedance and should be directly connected to the high impedance input of the oscilloscope.

The output electrical signal shall be integrated to recover the measured electromagnetic transient. This can be done by one of the passive integrators Montena has developed or by means of a mathematical integration.

To simplify your process, we recommend our PULSELab software application. It has been specifically designed to ease the measurement of electromagnetic transients with derivative sensors. We also strongly advise you to opt for our fiber-optic links to avoid interferences during measurements.

FAQ

A balun (balanced-to-unbalanced) is a passive device used to convert a differential signal into a single-ended signal, or the reverse. It allows measurement equipment with standard coaxial inputs to interface with differential sensors or circuits. In high-voltage measurement systems, a balun generates two signals with equal amplitude but opposite phase, creating a balanced pair from a single-ended input.

Baluns are specifically used with free-field B-dot or D-dot probes because these sensors output differential signals. A balun converts this differential output into a single-ended signal compatible with standard 50-ohm coaxial measurement equipment, preserving waveform fidelity and reducing unwanted common-mode noise.

Key technical parameters include frequency bandwidth, insertion loss, amplitude balance (how closely the two differential outputs match in magnitude), phase balance (how close the phase shift is to the ideal 180°), and impedance matching (typically 50-ohm systems). These parameters are critical for maintaining signal integrity when measuring high-speed electromagnetic transients.

Baluns are commonly used in pulsed electromagnetic field measurements, EMP and HPM testing setups, high-voltage pulsed power experiments, EMC and immunity testing, and laboratory RF characterisation of differential circuits.