SNIFT
The accurate and highly stable SNIFT software transforms measured spherical near-field antenna data to far fields, accounting for the full characteristics of the measuring probe.
Spherical near-field far-field transformations with full probe correction
SNIFT is specialised in near-field test ranges, with the primary function to perform fast and accurate transformations of an antenna’s field from one imaginary spherical surface to another, with the far-field sphere being a special case.
Why SNIFT
For your near- and far-field transformations.
Allows full or parial sphere input data
Input your full sphere or partial sphere data easily
Symmetric probe correction
Full correction for axially symmetric (m=±1) probes
Industry probe correction standard
Use the industry standard for spherical near-field to far-field transformation with probe correction
Implementation independency
Independent of the actual measurement system implementation
Transform and self-stabilise fast
Fast Fourier Transformation and self-stabilising recurrence relations allow handling of even very large antenna structures
Key product highlights
- Short transformation time
- Non-Maxwellian measurement inaccuracies are averaged to physically correct output
- Noise reduction by means of high-order spherical mode filtering
- Mathematically exact pattern transformation
- The output coordinate system may be rotated to coincide with the peak direction of the far field, which is not always coinciding with any of the measurement coordinate system axes
Core capabilities
Everything you need – in one environment.
Rotation of the spherical wave coefficients
If only a certain region of the antenna pattern has interest, it is possible to perform truncated measurements and still use SNIFT for the transformation. The transformed data are referred to the measurement coordinate system, but if, for example, the region of interest does not coincide with this system (e.g. a scanned beam), the supplementary program ROSCOE can be applied to do the appropriate coordinate transformation into a system centered around the peak.
Accurate determination of spherical harmonics
Well-founded choice of numerical implementation ensures a very stable algorithm, also for high-order harmonics. Antennas with diameters exceeding several hundred wavelengths are handled within seconds on a standard PC with accurate determination of all involved spherical harmonics.
Downloads
Technical documentation and resources for SNIFT. Open files download directly; the rest are available to customers with a portal account.
Some FAQs
Is it possible to use more than one type of element in an array?
Yes, both the full-wave and analytical arrays support mixing any number of different array elements.
Is it possible to use more than one type of element in an array?
Yes, both the full-wave and analytical arrays support mixing any number of different array elements.
Is it possible to use more than one type of element in an array?
Yes, both the full-wave and analytical arrays support mixing any number of different array elements.
Is it possible to use more than one type of element in an array?
Yes, both the full-wave and analytical arrays support mixing any number of different array elements.
Is it possible to use more than one type of element in an array?
Yes, both the full-wave and analytical arrays support mixing any number of different array elements.
Is it possible to use more than one type of element in an array?
Yes, both the full-wave and analytical arrays support mixing any number of different array elements.
Is it possible to use more than one type of element in an array?
Yes, both the full-wave and analytical arrays support mixing any number of different array elements.
Contact us
Your project may be complex, but we keep things simple. If you have any questions about our software or services, or you need expert consultancy, we are here to help.
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