Electromagnetic Formulation, Probe Development

Peer Reviewed Journal Publications

  1. Crocker, D.A. and K.M. Donnell, “Application of Electrically Invisible Antennas to the Modulated Scatterer Technique”, IEEE Transactions on Instrumentation and Measurement, 2015 (to appear).
  2. Baumgartner, M., M.T. Ghasr and R. Zoughi, “Wideband Imaging Array Using Orthogonally-Fed Dual Varactor-Loaded Elliptical Slots,” IEEE Transactions on Instrumentation and Measurement, vol. 64, no. 3, pp. 740-749, March 2015.
  3. Thotla, V., M. Zawodniok, M.T. Ghasr, J. Sarangapani, and S. Agarwal, “Detection and Localization of Multiple R/C Electronic Devices Using Array Detectors”, IEEE Transactions on Instrumentation and Measurement, vol. 64, no. 1, pp. 241-251, January 2015.
  4. Fallahpour, M., M.T. Ghasr and R. Zoughi, “Miniaturized Reconfigurable Multi-Band Antenna For Multiradio Wireless Communication,” IEEE Transactions on Antennas and Propagation, vol. 62, no. 12, pp. 6049-6059, December 2014.
  5. Kempin, M., M.T. Ghasr and R. Zoughi, “Modified Waveguide Flange for Evaluation of Stratified Composites,” IEEE Transactions on Instrumentation and Measurement, vol. 63, no. 6, pp. 1524-1534, June 2014.
  6. Case, J.T., M.T. Ghasr and R. Zoughi, “Correcting Mutual Coupling and Poor Isolation for Real-Time 2D Microwave Imaging Systems,” IEEE Transactions on Instrumentation and Measurement, vol. 63. No. 5, pp. 1310-1319, May 2014.
  7. Kothari, A., M.T. Ghasr and R. Zoughi, “Design Analysis of A Non-Directional Wideband Waveguide Coupler,” IEEE Transactions on Instrumentation and Measurement, vol. 63, no. 4, pp. 984-986, April 2014.
  8. Case, J.T., M.T. Ghasr and R. Zoughi, “Heterodyne Multi-Frequency Receiver for MST,” IEEE Transactions on Instrumentation and Measurement, vol. 63, no. 1, pp. 243-245, January 2014.
  9. Kharkovsky, S., Ghasr, M.T., Kam, K., Abou-Khousa, M.A., Zoughi, R., “Out-of-Plane Fed Elliptical Slot Array for Microwave Imaging,” IEEE Transactions on Antennas and Propagation, vol. 61, no. 10, pp. 5311-5314, October 2013.
  10. Thotla, V., M.T. Ghasr, M. Zawodniok, J. Sarangapani, and S. Agarwal "Detection of Super-Regenerative Receivers Using Hurst Parameter" IEEE Transactions on Instrumentation and Measurement, vol. 61, no. 10, pp. 5311-5314, October 2013.
  11. Ghasr, M.T., V. Thotla, M. Zawodniok, and J. Sarangapani, "Detection of Super Regenerative Receiver using Amplitude Modulated Stimulation" IEEE Transactions on Instrumentation and Measurement, vol. 62, no. 7, pp. 2029-2036, July 2013.
  12. Fallahpour, M., M. Baumgartner, A. Kothari, M.T. Ghasr, D. Pommerenke and R. Zoughi, “Compact Ka-Band One-Port Vector Reflectometer using a Wideband Electronically-Controlled Phase-Shifter,” IEEE Transactions on Instrumentation and Measurement, vol. 61, no. 10, pp. 2817-2826, October 2012.
  13. Donnell, K.M. and R. Zoughi, “Application of Embedded Dual-Loaded Modulated Scatterer Technique (MST) to Multilayer Structures,” IEEE Transactions on Instrumentation and Measurement, vol. 61, no. 10, pp. 2809-2816, October 2012.
  14. Williams, D.F., M.T. Ghasr, B. Alpert, Z. Shen, A. Arsenovic, R.M. Weikle, and R. Zoughi, “Legendre Fit of the Reflection Coefficient of a Radiating Rectangular Waveguide Aperture,” IEEE Transactions on Antennas and Propagation, vol. 60, no. 8, pp. 4009-4014, August 2012.
  15. Donnell, K.M. and R. Zoughi, “Detection of Corrosion in Reinforcing Steel Bars Using Microwave Dual-Loaded Differential Modulated Scatterer Technique,” IEEE Transactions on Instrumentation and Measurement, vol. 61, no. 8, pp. 2320-2322, August 2012.
  16. Ghasr, M.T. and R. Zoughi, “A High Dynamic Range Heterodyne Microwave Receiver for Modulated Scattering Measurements,” IEEE Transactions on Instrumentation and Measurement, vol. 61, no. 3, pp. 811-816, March 2012.
  17. Kharkovsky, S., A. McClanahan, R. Zoughi and D. Palmer, “Microwave Dielectric-Loaded Rectangular Waveguide Resonator for Depth Evaluation of Shallow Flaws in Metals,” IEEE Transactions on Instrumentation and Measurement, vol. 60, no. 12, pp. 3923-3930, December 2011.
  18. Kharkovsky, S., M.T. Ghasr, M. A. Abou-Khousa and R. Zoughi, "K-band Varactor Diode-Tuned elliptical Slot Antenna", IEEE Transactions on Antennas and Propagation, vol. 59, no. 11, pp. 4325-4328, November 2011.
  19. Donnell, K., M. A. Abou-Khousa, M. Belayneh, and R. Zoughi, “Dual-Loaded Modulated Dipole Scatterer as an Embedded Sensor,” IEEE Transactions on Instrumentation and Measurement, vol. 60, no. 5, pp. 1884-1892, May 2011.
  20. Abou-Khousa, M., M.T. Ghasr, S. Kharkovsky, D. Pommerenke and R. Zoughi, “Modulated Elliptical Slot Antenna for Electric Field Mapping and Microwave Imaging,” IEEE Transactions on Antennas and Propagation, vol. 59, no. 3, pp. 733-741, March 2011.
  21. Abou-Khousa, M., M.A. Baumgartner, S. Kharkovsky and R. Zoughi, “Ka-Band Vector Reflectometer based on Simple Phase-Shifter Design,” IEEE Transactions on Instrumentation and Measurement, vol. 60, no. 2, pp. 618-624, February 2011.
  22. Ghasr, M.T., D. Pommerenke, J.T. Case, A.D. McClanahan, A. Aflaki-Beni, M. Abou-Khousa, S. Kharkovsky, K. Guinn, F. DePaulis and R. Zoughi, “Rapid Rotary Scanner and Portable Coherent Wideband Q-Band Transceiver for High-Resolution Millimeter Wave Imaging Applications,” IEEE Transactions on Instrumentation and Measurement, vol. 60, no. 1, pp. 186-197, January 2011.
  23. McClanahan, A., S. Kharkovsky, R. Zoughi, A. Maxon and D.D. Palmer, “Depth Evaluation of Shallow Surface Cracks in Metals Using Rectangular Waveguides at Millimeter-Wave Frequencies,” IEEE Transactions on Instrumentation and Measurement, vol. 59, no. 6, pp. 1693-1704, June 2010.
  24. Abou-Khousa, M.A. and R. Zoughi, “Multiple Loaded Scatterer Method for E-Field Mapping Applications,” IEEE Transactions on Antennas and Propagation, vol. 58, no. 3, pp. 900-907, March 2010.
  25. Abou-Khousa, M.A., M.A. Baumgartner, S. Kharkovsky and R. Zoughi, “Novel and Simple High Frequency Single-Port Vector Network Analyzer (VNA),” IEEE Transactions on Instrumentation and Measurement, vol. 59, no. 3, pp. 534-542, March 2010.
  26. Kharkovsky, S., M.T. Ghasr and R. Zoughi, “Near-field Millimeter Wave imaging of Exposed and Covered Fatigue Cracks,” IEEE Transactions on Instrumentation and Measurement, vol. 58, no. 7, pp. 2367-2370, July 2009.
  27. Abou-Khousa, M., S. Kharkovsky and R. Zoughi, “Novel Near-Field Millimeter Wave Differential Probe Using A Dual-Loaded Modulated Aperture,” IEEE Transactions on Instrumentation and Measurement, vol. 58, no. 5, pp. 1273-1282, May 2009.
  28. Ghasr, M., D. Simms and R. Zoughi, “Multimodal Solution for a Waveguide Radiating into Multilayered Structures - Dielectric Property and Thickness Evaluation,” IEEE Transactions on Instrumentation and Measurement, vol. 58, no. 5, pp. 1505-1513,May 2009.
  29. Abou-Khousa, M. and R. Zoughi, "Maxwellian Circuits-Based Analysis of Loaded Wire Antennas and Scatterers," IEEE Antennas and Wireless Propagation Letters, vol. 7, pp. 318-320, October 2008.
  30. Munoz, K.M. and R. Zoughi, “Improvements of Probe Response Extraction Using Time Domain Gating for Embedded Modulated Scatterer Technique,” Materials Evaluation, vol. 66, no. 10, pp. 1084-1090, October 2008.
  31. Kharkovsky, S., E.A. Nanni and R. Zoughi, “Application of Frustrated Total Internal Reflection of Millimeter Waves for Detection and Evaluation of Disbonds in Dielectric Joints,” Applied Physics Letters, vol. 92, issue 9, 094101, p. 3, March 4 2008.
  32. Kharkovsky, S., A.C. Ryley, V. Stephen and R. Zoughi, “Dual-Polarized Near-Field Microwave Reflectometer for Non-Invasive Inspection of Carbon Fiber Reinforced Polymer (CFRP)-Strengthened Structures,” IEEE Transactions on Instrumentation and Measurement, vol. 57, no. 1, pp. 168-175, January 2008.
  33. Randazzo, A., M.A. Abou-Khousa, M. Pastorino and R. Zoughi, “Direction of Arrival Estimation Based on Support Vector Regression: Experimental Validation and Comparison with MUSIC,” IEEE Antennas and Wireless Propagation Letters, vol. 6, pp. 379-382, June 2007.
  34. Abou-Khousa, M., and R. Zoughi, “Disbond Thickness Evaluation Employing Multiple-Frequency Near-Field Microwave Measurements,” IEEE Transactions on Instrumentation and Measurement, vol. 56, no. 4, pp. 1107-1113, August 2007.
  35. Ghasr, M., B. Carroll, S. Kharkovsky, R. Austin and R. Zoughi, “Millimeter Wave Differential Probe for Nondestructive Detection of Corrosion Precursor Pitting,” IEEE Transactions on Instrumentation and Measurement, vol. 55, no. 5, pp. 1620-1627, October 2006.
  36. Nadakuduti, J., G. Chen and R. Zoughi, “Semi-Empirical Electromagnetic Modeling of Crack Detection and Sizing in Cement-Based Materials Using Near-Field Microwave Methods,” IEEE Transactions on Instrumentation and Measurement, vol. 55, no. 2, pp. 588-597, April 2006.
  37. Hughes, D. and R. Zoughi, “A Novel Method for Determination of Dielectric properties of Materials Using a Combined Embedded Modulated Scattering and Near-Field Microwave Techniques.  Part I – Forward Model,” IEEE Transactions on Instrumentation and Measurement, vol. 54, no. 6, pp. 2389-2397, December 2005.
  38. Hughes, D. and R. Zoughi, “A Novel Method for Determination of Dielectric properties of Materials Using a Combined Embedded Modulated Scattering and Near-Field Microwave Techniques.  Part II – Dielectric Property Recalculation,” IEEE Transactions on Instrumentation and Measurement, vol. 54, no. 6, pp. 2398-2401, December 2005.
  39. Ghasr, M., S. Kharkovsky, R. Zoughi and R. Austin, “Comparison of Near-Field Millimeter Wave Probes for Detecting Corrosion Precursor Pitting under Paint,” IEEE Transactions on Instrumentation and Measurement, vol. 54, no. 4, pp. 1497-1504, August 2005.
  40. Qaddoumi, N., T. Bigelow, R. Zoughi, L. Brown and M. Novack, “Reduction of Sensitivity to Surface Roughness and Slight Standoff Distance Variations in Microwave Inspection of Thick Composite Structures,” Materials Evaluation, vol. 60, no. 2, pp. 165-170, February 2002.
  41. Mubarak, K., K.J. Bois and R. Zoughi, “A simple, Robust and On-Site Microwave Technique for Determining Water-to-Cement (w/c) Ratio of fresh Portland Cement-Based Materials,” IEEE Transactions on Instrumentation and Measurement, vol. 50, no. 5, pp. 1255-1263, October 2001.
  42. Bois, K, L. Handjojo, A. Benally, K. Mubarak and R. Zoughi, “Dielectric Plug-Loaded Two-Port Transmission Line Measurement Technique for Dielectric Property Characterization of Granular and Liquid Materials,” IEEE Transactions on Instrumentation and Measurement, vol. 48, no. 6, pp. 1141-1148, December 1999.
  43. Bois, K., A. Benally and R. Zoughi, “An Exact MultiMode Solution for the Reflection Properties of an Open-Ended Rectangular Waveguide Radiating into a Dielectric Half-Space: Forward and Inverse Problems,” IEEE Transactions on Instrumentation and Measurement, vol. 48, no. 6, pp. 1131-1140, December 1999.
  44. Qaddoumi, N. and R. Zoughi, “Preliminary Study of the Influences of Effective Dielectric Constant and Non-Uniform Probe Aperture Field Distribution on Near-Field Microwave Images,” Materials Evaluation, vol. 55, no. 10, pp. 1169-1173, October, 1997.
  45. Huber, C., H. Abiri, S. Ganchev and R. Zoughi, “Modeling of Surface Hairline Crack Detection in Metals Under Coatings Using Open-Ended Rectangular Waveguides,” IEEE Transactions on Microwave Theory and Techniques, vol. 45, no. 11, pp. 2049-2057, November 1997.
  46. Huber, C., H. Abiri, S. Ganchev and R. Zoughi, “Analysis of the Crack Characteristic Signal Using a Generalized Scattering Matrix Representation,” IEEE Transactions on Microwave Theory and Technique, vol. 45, no. 4, pp. 477-484, April, 1997.
  47. Bakhtiari, S., S. Ganchev and R. Zoughi, “A Generalized Formulation for Admittance of an Open-Ended Rectangular Waveguide Radiating into Stratified Dielectrics,” Research in Nondestructive Evaluation, vol. 7, no. 2/3, pp. 75-87, 1995.
  48. Shalaby, W. and R. Zoughi, “Analysis of Monopole Sensors for Cement Paste Compressive Strength Estimation,” Research in Nondestructive Evaluation, vol. 7, no. 2/3, pp. 101-105, 1995.
  49. Ganchev, S., N. Qaddoumi, S. Bakhtiari and R. Zoughi, “Calibration and Measurement of Dielectric Properties of Finite Thickness Composite Sheets with Open-Ended Coaxial Sensors,” IEEE Transactions on Instrumentation and Measurement, vol. IM-44, no. 6, p. 1023-1029, December, 1995.
  50. Ganchev, S., N. Qaddoumi, E. Ranu and R. Zoughi, “Microwave Detection Optimization of Disbond in Layered Dielectrics with Varying Thicknesses,” IEEE Transactions on Instrumentation and Measurement, vol. IM-44, no. 2, pp. 326-328, April, 1995.
  51. Qaddoumi, N. and R. Zoughi, “Microwave Scattering Characteristics of Defective Dielectric Cylinders,” NDT&E International, vol. 27, no. 6, pp. 299-305, 1994.
  52. Yeh, C. and R. Zoughi, “Microwave Detection of Finite Surface Cracks in Metals Using Rectangular Waveguide Sensors,” Research in Nondestructive Evaluation, vol. 6, no. 1. pp. 35-55, 1994.
  53. Yeh, C. and R. Zoughi, “A Novel Microwave Method for Detection of Long Surface Cracks in Metals,” IEEE Transactions on Instrumentation and Measurement, vol. 43, no. 5, pp. 719-725, October, 1994.
  54. Yeh, C., E. Ranu and R. Zoughi, “A Novel Microwave Method for Surface Crack Detection Using Higher Order Waveguide Modes,” Materials Evaluation, vol. 52, no. 6, pp. 676-681, June, 1994.
  55. Bakhtiari, S., S. Ganchev and R. Zoughi, “Analysis of the Radiation of an Open-Ended Coaxial Line into Stratified Dielectrics,” IEEE Transactions on Microwave Theory and Techniques, vol. 42, no. 7, pp. 1261-1267, July, 1994.
  56. Bakhtiari, S., S. Ganchev, N. Qaddoumi and R. Zoughi, “Microwave Non-Contact Examination of Disbond and Thickness Variation in Stratified Composite Media,” IEEE Transactions on Microwave Theory and Techniques, vol. 42, no. 3, pp. 389-395, March, 1994.
  57. Edwards, J. and R. Zoughi, “Microwave Sensitivity Maximization of Disbond Characterization in Conductor Backed Dielectric Composites,” Journal of Nondestructive Evaluation, vol. 12, no. 3, pp. 193-198, September, 1993.
  58. Bakhtiari, S., S. Ganchev and R. Zoughi, “Microwave Frequency Optimization for Accurate Thickness or Dielectric Property Monitoring of Conductor Backed Composites,” Materials Evaluation, vol. 51, no. 6, pp. 740-743, June, 1993.
  59. Bakhtiari, S., S. Ganchev and R. Zoughi, “Open-Ended Rectangular Waveguide for Nondestructive Thickness Measurement and Variation Detection of Lossy Dielectric Slabs Backed by a Conducting Plate,” IEEE Transactions on Instrumentation and Measurement, vol. 42, no. 1, pp. 19-24, February, 1993.
  60. Ganchev, S., S. Bakhtiari and R. Zoughi, “A Novel Numerical Technique for Dielectric Measurement of Lossy Dielectrics,” IEEE Transactions on Instrumentation and Measurement, vol. IM-41, no. 3, pp. 361-365, June, 1992.
  61. Bakhtiari, S., and R. Zoughi, “Microwave Thickness Measurement of Lossy Layered Dielectric Slabs Using Incoherent Reflectivity,” Research in Nondestructive Evaluation, vol. 2, no. 3, pp. 157-168, 1990.
  62. Zoughi, R. and S. Bakhtiari, “Microwave Nondestructive Detection and Evaluation of Disbonding and Delamination in Layered-Dielectric-Slabs,” IEEE Transactions on Instrumentation and Measurement, vol. 39, no. 6, pp. 1059-1063, December, 1990.

Conference Presentations and Proceedings Papers

  1. Pieper, D. and K.M. Donnell, “Approximation of Effective Dielectric Constant for FSS in Layered Dielectrics using Conformal Mapping”, Proceedings of the 2015 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, Vancouver, BC, Canada, July 19-24, 2015.
  2. Hilgedick, S., J.N. Vutukury, and K.M. Donnell, “Application of Open-Ended Coaxial Probes for Detection of Sand Production from Petroleum Wells”, Proceedings of the International Instrumentation and Measurement Technology Conference, pp. 675-680, May 12-15, 2014, Montevideo, Uruguay.
  3. S. Ebrahimi Asl, M. Behgam, M. Zawodniok, and M.T. Ghasr, "Experimental Validation of Minimum Variance Unbiased Estimator of Structural Scattering Coefficient for an RFID antenna Using Linear Model," Proceedings of the IEEE International Instrumentation and Measurement Technology Conference (I2MTC), May 12-15, 2014, Montevideo, Uruguay
  4. S. Ebrahimi Asl, M.T. Ghasr, M. Zawodniok, K.E. Robinson, "Preliminary Study of Mutual Coupling Effect on a Passive RFID Antenna Array," Proceedings of the IEEE International Instrumentation and Measurement Technology Conference (I2MTC), pp.138-141, 6-9 May 2013.
  5. V. Thotla, M.T.  Ghasr, M. Zawodniok, S. Jagannathan, S. Agarwal. “Detection and Localization of R/C Electronice Devices Using Hurst Parameter.” Proceedings of SPIE 8359, 835915 (2012).
  6. V. Thotla, M.T. Ghasr, M. Zawodniok, S. Jagannathan, S. Agarwal, "Detection and localization of multiple R/C electronic devices using array detectors," Proceedings of the IEEE International Instrumentation and Measurement Technology Conference (I2MTC), pp.1687-1691, 13-16 May 2012.