Principal publications: 

      1.            “Radiation Characteristics of a Dielectric-Coated Axial Slot Cylindrical Antenna Partly Imbedded in a Ground Plane”, H. A. Ragheb and U. M. Johar, IEEE Transactions on Antenna and Propagation, Volume 46, Number 10, October 1998, Pages 1542-1547.

      2.            “Radiation By An Axial Slot On A Dielectric-Coated Concentric Conducting Circular Cylinder Loading A Semicircular Gap in a Ground Plane”, H. A. Ragheb and U. M. Johar, IEEE Antennas and Propagation Society International Symposium, Newport Beach, California, June 18-23, 1995, Pages 560-563.

      3.            "EMF Measurement, Mitigation, and Evaluation of EHV Transmission Lines in Saudi Arabia", M. H. Shwehdi, J. M. Bakhashwain, U. M. Johar and A. A. AL-Naim,  GGG POWER 2003 Conference & Exhibition, December 08 – 10, 2003, Muscat, Oman.

      4.          “Magnetic Field Measurement And Evaluation Of High Voltage Transmission Lines In Saudi Arabia”, J. M. Bakhashwain, M. H. Shwehdi, U. M. Johar and A. A. AL-Naim, 10th IEEE International  Conference on Electronics,  Circuits and Systems, ICECS 2003, December 14–17, 2003,  University of Sharjah, Sharjah, United Arab Emirates (U.A.E.).

      5.           “Magnetic Field Measurement And Evaluation Of EHV Transmission Lines in Saudi Arabia”, J. M. Bakhashwain, M. H. Shwehdi, U. M. Johar and A. A. Al-Naim, Proceedings of the International Conference On Non-Ionizing Radiation at UNITEN (ICNIR 2003), October 20 - 22, 2003, Tenaga Nasional University, Kuala Lumpur, Malaysia.

      6.           “Transmission Line EMF Interference with Buried Pipeline: Essential & Cautions”, M. H. Shwehdi and U. M. Johar, International Conference On Non-Ionizing Radiation ICNIR 2003, October 20 - 22, 2003,  Tenaga Nasional University, Kuala Lumpur, Malaysia.

      7.            “UWB Multipath Simulator based on TEM Horn Antenna” Muqaibel, A.H., Johar, U.M., The 2nd IEEE International Conference on Wireless Broadband and Ultra Wideband Communications, (AusWireless 2007), Sydney, Australia, 27-30 August 2007.