I Agree - Nearfield Systems Inc.
I Agree - Nearfield Systems Inc. I Agree - Nearfield Systems Inc.
PNF phase distribution for back projection0.15Hologram phase of Array04_003.datY (meters)0.100.050.00-0.05-0.101801701601501401301201101009080706050403020100-10-20-30-40-50-60-70-80-90-100-110-120-130-140-150-160-170-180-0.15-0.20 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 0.20X (meters)July 2007 16
SNF Radial Distance Sensitivity I• SNF back projection resolution is independent of distance betweenAUT and probe• Holds a significant advantage over PNF method• Will in practice be limited by instrumentation dynamic rangeHologram amplitude of SNF_sim_21x13_Array_One_element_phase_rev.nsiHologram amplitude of SNF_sim_21x13_Array_One_element_phase_rev2.nsi0.300.300.2000.200-1-1-2-2-3-30.10-4-50.10-4-5-6-6Y (meters)0.00-7-8-9-10-11-12-13Y (meters)0.00-7-8-9-10-11-12-13-0.10-14-15-0.10-14-15-16-16-17-17-18-18-0.20-19-20-0.20-19-20-0.30-0.30 -0.20 -0.10 0.00 0.10 0.20 0.30-0.30-0.30 -0.20 -0.10 0.00 0.10 0.20 0.30X (meters)X (meters)July 2007 17
- 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: Single element with reversed phase1
- 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 and 30: Conclusions I• SNF back projectio
- Page 31: Limitations• The data presented h
PNF phase distribution for back projection0.15Hologram phase of Array04_003.datY (meters)0.100.050.00-0.05-0.101801701601501401301201101009080706050403020100-10-20-30-40-50-60-70-80-90-100-110-120-130-140-150-160-170-180-0.15-0.20 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 0.20X (meters)July 2007 16
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