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Microwave Nondestructive Testing of Composite Materials using Free-Space Microwave Measurement Techniques

Deepak Kumar Ghodgaonkar, Nor Azlin Ali
Faculty of Electrical Engineering,
MARA University of Technology,
40450 Shah Alam, Selangor, Malaysia
Luigi Giubbolini
IRITI-CNR, Department of Electronic,
Polytechnic of Turin,
10129 Turin, Italy.
Contact

Abstract

Introduction

Free-space Microwave Measurement System

Reflection-Transmission Method

Experimental Results

Discussion and Conclusions

References

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  2. Ghodgaonkar, D. K., Majid, Wan Mahmood B. W. A. and Majid, Rosnoizam B. A. "Accurate Measurement of Electromagnetic Properties of Concrete for nondestructive Evaluation at Microwave Frequencies," Creating with Concrete, Universiiy of Dundee International Congress, Dundee, Scotland, UK, September 6-10, 1999, pp. 672-679.
  3. Al-Qadi, I. L., Ghodgaonkar, D. K., Varadan, V. K. and Varadan, V. K., "Effect of moisture on asphaltic concrete at microwave frequencies," IEEE Transactions on Geoscience and Remote Sensing, Vol. 29, 1991, pp. 710-717.
  4. Ghodgaonkar, D. K., Majid, Wan Mahmood B. W. A. and Husin, Hilmi, "Microwave Nondestructive Testing of Malaysian Timber for Grading Applications, quot; 6th World Conference on Timber Engineering, Whistler Resort, British Columbia, Canada, July 31 - August 3, 2000.
  5. Botsco, R. J., Cribbs, R. W., King, R. J. and McMaster, R. C., "Microwave methods and applications in nondestructive testing, " in Nondestructive Testing Handbook, Pual McIntire, Ed. Second Edition, Vol. 4, Section 18, 1986, American Society of Nondestructive Testing.
  6. Redheffer, R. M. "The measurement of dielectric constant, " in Techniques of Microwave Measurements, C. G. Montgomery, Ed., Vol. 2, 1966, Dover, pp. 591-657.
  7. Bassett, H. L., "A free-space focused microwave system to determine the complex permittivity of materials to temperature exceeding 2000° C, " The Review of Scientific Instruments, Vol. 42, 1971, pp. 200-204.
  8. Ghodgaonkar, D. K., Varadan, V. V. and Varadan, V. K. "Free-space method for measurement of dielectric constants and loss tangents at microwave frequencies, " IEEE Transactions on Instrumentation and measurement,, Vol. 38, 1989, pp. 789-793.
  9. Ghodgaonkar, D. K., Varadan, V. V. and Varadan, V. K. "Free-space measurement of complex permittivity and complex permeability of magnetic materials at microwave frequencies, " IEEE Transactions on Instrumentation and Measurements," Vol. 39, 1990, pp. 398-394.
  10. Umari, M. H., Ghogaonkar, D. K., Varadan, V. V. and Varadan, V. K. "A free-space bistatic calibration technique for the measurement of parallel and perpendicular reflection coefficients of planar samples, " IEEE Transactions on Instrumentation and Measurement, Vol. 40, 1991, pp. 19-24.
  11. . Ghodgaonkar, D. K., Varadan, V. K. and Varadan, V. V. "Microwave Dielectric and Magnetic Properties of Carbonyl Iron Powder Loaded Silicon Rubber Sheets," URSI Radio Science Meeting, July 18-25, 1992, Chicago, IL., USA.

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