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MVG probes and feeds are dedicated microwave sensors used to characterize a device under test. Antenna specifications are tailored to the specific measurement range and technique used, either based on Near-field or Far-field methods.
Near-field methods have the advantage of operating in a more compact footprint; the measurement distance is only a few wavelengths. Transformation is then used to determine the far-field, which can be implemented by means of an analog approach, as in CATR systems, or by means of a numerical approach. The latter requires the field to be sampled in a specific geometry (planar, cylindrical, spherical) in order for the field transformation to be applied.
MVG measurement probes are designed to comply with the ideal physical constraints imposed by near-field and far-field measurement techniques, in order to obtain the most accurate characterization of the antenna under test.
