I Agree - Nearfield Systems Inc.

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SNF Amplitude sensitivity IIHologram amplitude of SNF_sim_21x13_Array.nsiAmplitude changein the backprojected field forexcitationamplitude changeof a single arrayelement.Amplitude (dB)0-1-2-3-4-5-6Ref 0.5dB 1dB 3dB 10dB-7-8-9-10-0.20 -0.15 -0.10 -0.05 0.00 0.05 0.10Y (meters)July 2007 26
PNF Amplitude sensitivity IIHologram amplitude of Array09_063.datAmplitude changein the backprojected field forexcitationamplitude changeof a single arrayelement.Amplitude (dB)0.0-0.5-1.0-1.5-2.0-2.5-3.0Ref 0.5dB 1dB 3dB 10dB-3.5-4.0-4.5-5.0-0.05 -0.04 -0.03 -0.02 -0.01 0.00 0.01 0.02 0.03 0.04 0.05Y (meters)July 2007 27
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: PNF Amplitude sensitivity IHologram
Page 29 and 30: Conclusions I• SNF back projectio
Page 31: Limitations• The data presented h

I Agree - Nearfield Systems Inc.

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