I Agree - Nearfield Systems Inc.

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Conclusions II• SNF holds advantage over PNF due to largerprobe/AUT separation distance.• Spherical wave expansion theory can be applied totraditional roll/azimuth far-field ranges.July 2007 30
Limitations• The data presented here relies on the use of aninfinitesimal point “probe” and the effect of the probe, aswould be present in an actual measurement environment,is absent.• Instrumentation dynamic range limitation will affectresults.July 2007 31
Page 2 and 3: Overview• Prior work• Simulatio
Page 4 and 5: Planar Near-field ScanJuly 2007 4
Page 6 and 7: Back Projection( )( , , ) ( , )iγ
Page 8 and 9: Far-field Expressionst ( k , k )A x
Page 11 and 12: Simulated array radiators.13 Elemen
Page 13 and 14: Orthogonal near-field pattern cutsN
Page 15 and 16: Single element with reversed phase1
Page 17 and 18: SNF Radial Distance Sensitivity I
Page 19 and 20: SNF Angular Span Sensitivity• < H
Page 21 and 22: SNF Angular Span Sensitivity - cont
Page 23 and 24: PNF Probe to AUT separation distanc
Page 25 and 26: PNF Amplitude sensitivity IHologram
Page 27 and 28: PNF Amplitude sensitivity IIHologra
Page 29: Conclusions I• SNF back projectio

I Agree - Nearfield Systems Inc.

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