Materials Measurement Phil Bartley Shelley Begley

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NIST Model• Technique uses all four measured s-parameters to calculatepermittivity. This eliminates the need to know the position ofthe sample in the sample holder. The sample is assumed tobe non-magnetic.• Sometimes has a problem converging to an answer whenthe measurement errors in S 11 and S 22 is large.J. Baker-Jarvis, E. Vanzura, W. Kissick. “Improved Technique for Determining ComplexPermittivity with the Transmission/Reflection Method.” IEEE Transactions on MicrowaveTheory and Techniques, vol 38, no. 8, pp. 1096-1103, August 1990.The NIST model was developed by Jim Baker-Jarvis of NIST (and others). It uses allfour measured s-parameters to determine permittivity. The material is assumed to benon-magnetic. It is an iterative approach and sometimes has problems convergingwhen the measurement errors in S 11 and S 22 are large.40
Here is an example of using the NIST model to calculate the value of permittivity for aTeflon sample.41
Page 3: Extremely Diverse Applications“Ma
Page 6 and 7: Maxwell’s Equations∇× E=−∂
Page 8 and 9: Permittivity and Permeability Defin
Page 10 and 11: Definition of Dielectric Constant o
Page 12 and 13: Dielectric MechanismsIonic Polariza
Page 14 and 15: Consider Dipole RotationRandom Orie
Page 16 and 17: Electric Field Changed DirectionEDi
Page 18 and 19: Small and Large MoleculesMany mater
Page 20 and 21: ε rε' '',r6040Debye Relaxation fo
Page 22 and 23: Cole-Cole Plot Explanation"ε r3020
Page 24 and 25: Other Empirical ModelsταβOnly fe
Page 26 and 27: Dielectric Properties (at 3 GHz)100
Page 28 and 29: Which Technique is Best? Frequency
Page 30 and 31: Impedance Analyzers and FixturesHer
Page 32 and 33: Measurement Techniques that use a V
Page 34 and 35: Transmission LineMaterial assumptio
Page 36 and 37: Transmission Algorithms in 85071EOp
Page 38 and 39: Problems with N-R Model• This set
Page 42 and 43: Transmission (Fast) Model• This t
Page 44 and 45: Weakness of both the NIST and Trans
Page 46 and 47: Transmission Line Measurement Error
Page 48 and 49: Typical Errors Caused By Air GapsPe
Page 50 and 51: Transmission Line Technique Summary
Page 52 and 53: Non-Contacting method for High or L
Page 54 and 55: 40 - 60GHz Free Space System54
Page 56 and 57: Free Space W-band SystemHere is a p
Page 58 and 59: Free Space Quasi-Optical SystemHere
Page 60 and 61: Before a Measurement Can be Made…
Page 62 and 63: TRL CalibrationThruReflectMove the
Page 64 and 65: Gated Reflect Line (GRL) Calibratio
Page 66 and 67: MUT and GRL Error AdaptersAfter 2-P
Page 68 and 69: MUT and GRL Error AdaptersAfter O11
Page 70 and 71: GRL Thru Standard (Air)A 11 =A 22 =
Page 72 and 73: QO System SchematicAdditional infor
Page 74 and 75: Measurement Results0.03Imaginary pa
Page 76 and 77: Measurement with NRL Arch andoption
Page 78: Free Space LabWith u-band calibrati

Materials Measurement Phil Bartley Shelley Begley

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