Meaning
Mathematical subtraction of the measurement probe’s own directional radiation characteristics from a raw near-field sweep represents a requirement for high-accuracy antenna pattern reconstruction. In automated test environments, probe pattern compensation removes the distortion introduced by the probe antenna’s finite physical size and non-ideal polarization. This deconvolution process calculates the true radiation field of the antenna under test, correcting for the spatial filtering effect of the probe itself.
Numerical Reconstruction
The correction procedure processes the raw signal data through a series of matrix operations in the spherical or planar wave domain. During this stage, probe pattern compensation applies pre-measured probe calibration files to adjust the amplitude and phase data at each point of the grid. This adjustment isolates the transmitter’s actual radiation patterns from the measuring instrument’s spatial footprints.
Data Requirement
Executing this correction requires a complete three-dimensional calibration file of the test probe.
Test Accuracy
Without this mathematical adjustment, the reconstructed far-field pattern would exhibit artificially suppressed sidelobes and distorted main beam widths. Applying probe pattern compensation allows laboratories to use wider, more mechanically stable probe antennas without sacrificing high-frequency measurement accuracy. This numerical approach ensures that the finished smart device meets the spatial coverage limits defined by cellular network standards.
