The output planar near-field
of 324 GHz channel on the front layer is similarly measured with the three different cases, including FSS, polarizer, and direct transmission through air as a reference.
Eibert, "Adaptive sampling in multilevel plane wave based near-field far-field transformed planar near-field
measurements," Progress In Electromagnetic Research, Vol.
The error behavior of FIAFTA against planar near-field
measurement errors in comparison with the traditional technique employing the two dimensional Fast Fourier Transform (2D FFT) has already been performed.
These modes can be deduced by filtering the planar near-field
measurements by a 2D low-pass filter as shown in the Figure 5.
One way to obtain this kind of information is through the use of planar near-field
Raisanen, "Pilot signal-based real-time measurement and correction of phase errors caused by microwave cable flexing in planar near-field
tests," IEEE Transactions on Antennas and Propagation, Vol.
I.Williams, "Bi-polar planar near-field
measurement technique, part II: near-field to far-field transformation and holographic imaging methods," IEEE Transactions on Antennas and Propagation, vol.
Yaghjian, "Planar near-field
scanning in the time domain, Part 1: Formulation," IEEE Trans.
The combination of the antenna rotation and linear probe motion yields planar near-field
data collected on concentric rings, with data points lying on radial lines.
A 2 m reflector that requires a 3 m X 3 m X-Y scan takes approximately two hours to test eight ports at 36 GHz using a NSI 300V-12 X 12 planar near-field
scanner with a 20-inch per second (ips) scan axis and a competitive receiver at a single frequency.
The MI-3630 system is a planar near-field
measurement system comprised of a precision planar (X-Y axes) scanner, near-field probe, two-axis position controller, and workstation computer and software.
(PNF) antenna measurements are appropriate for medium and high gain antennas and ideally require measurements on an infinite plane.