Materials Measurement Phil Bartley Shelley Begley

More documents

Recommendations

Info

Transmission (Fast) Model• This technique minimizes the difference between themeasured and calculated values of S 21.. The sample isassumed to be non-magnetic.• Often converges to a solution when the NIST model fails.This is because it doesn’t depend on S 11 . The error inmeasuring S 11 is often a order of magnitude worst than whenmeasuring S 21 .The transmission model is based on minimizing the difference between the measuredvalue of the transmission coefficient and the computed value. It assumes that thematerial is non-magnetic. It is an iterative method that starts with an initial guess forpermittivity (usually 1+j0) and improves the guess until the difference is near zero.42
Here is the computed value of permittivity for a Teflon sample. It is virtually identicalto the values computed by the NIST model.43
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 40 and 41: NIST Model• Technique uses all fo
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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?