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Information for

Omar Ramahi

Professor

Contact InformationOmar Ramahi

Phone: 519-888-4567 x37460
Location: EIT 4154

Biography Summary

Omar Ramahi is an Electrical and Computer Engineering Professor at the University of Waterloo.

Professor Ramahi’s research interests include radiating systems, renewable energy technology, biomedical applications of electromagnetic waves and fields, electromagnetic compatibility and interference, metamaterials and its engineering applications, and material measurements. In addition to his research, he co-founded Applied Electromagnetic Technology, LLC.

Professor Ramahi has received numerous awards as a result of his extensive research and teaching capabilities. He was recognized for his graduate research work with the 2010 University of Waterloo Award for Excellence in Graduate Supervision. Additionally, Professor Ramahi was awarded the IEEE Electromagnetic Compatibility Society Technical Achievement Award in 2012. Professor Ramahi is an elected IEEE Fellow.

Professor Ramahi has written over 300 journal and conference papers on electromagnetic phenomena and computational techniques. EMI/EMC Computational Modeling Handbook is one of the notable books that Professor Ramahi has co-authored.

Research Interests

  • Radiating Systems
  • Theoretical And Computational Electromagnetics
  • Electromagnetic Compatibility
  • Interference And Electronic Packaging
  • Biomedical Applications Of Electromagnetics
  • Photonics
  • Material Measurements
  • Antennas
  • Microwaves & Photonics
  • Medical Imaging
  • Scanning
  • Energy Harvesting/bio-energy
  • Renewable Energy
  • Sensors And Devices
  • Wireless Communications/networking

Education

  • 1986, Master's, Electrical and Computer Engineering, University of Illinois at Urbana-Champaign
  • 1984, Bachelor's, Electrical and Computer Engineering, Oregon State University

Courses

  • ECE 106 - Electricity and Magnetism
  • GENE 123 - Electrical Circuits and Instrumentation
  • ECE 207 - Signals and Systems
  • ECE 675 - Radiation & Propagation of Electromagnetic Fields
  • ECE 475 - Radio-Wave Systems
  • ECE 770 - Special Topics in Antenna and Microwave Theory

Selected/Recent Publications

  • Alzoubi, Khawla and Alguraan, Ziyad and Ramahi, Omar M, Portable Automated Oxygen Administration System for hypoxaemic patients, SpringerPlus, 5(1), 2016
  • Moomen, Abdelniser and Ali, Abdulbaset and Ramahi, Omar M, Reducing Sweeping Frequencies in Microwave NDT Employing Machine Learning Feature Selection, Sensors, 16(4), 2016
  • Ruphuy, Miguel and Ramahi, Omar M, Spherical aberration in electrically thin flat lenses, JOSA A, 33(8), 2016, 1531 - 1536
  • El Badawe, Mohamed and Almoneef, Thamer S and Ramahi, Omar M, A True Metasurface Antenna, Scientific reports, 6, 2016
  • Ruphuy, Miguel and Ramahi, Omar M, Refraction in electrically thin inhomogeneous media, JOSA A, 33(4), 2016, 538 - 543
  • Carney, P Scott and Cui, Linyan and Xue, Bindang and Zhou, Fugen and Charnotskii, Mikhail and Zhang, Yong and Kim, Yong-Jun and Yi, Hong-Liang and Tan, He-Ping and Frazin, Richard A and others, A new addition to the JOSA A team: editorial, Journal of the Optical Society of America. A, Optics, image science, and vision, 33(4), 2016
  • Almoneef, Thamer S and Sun, Hu and Ramahi, Omar M, A 3-D Folded Dipole Antenna Array for Far-Field Electromagnetic Energy Transfer, IEEE Antennas and Wireless Propagation Letters, 15, 2016, 1406 - 1409
  • Siddiqui, Omar and Ramzan, Rashad and Amin, Muhammad and Ramahi, Omar M, A Non-Invasive Phase Sensor for Permittivity and Moisture Estimation Based on Anomalous Dispersion, Scientific Reports, 6, 2016
  • Ali, Abdulbaset and Hu, Bing and Ramahi, Omar, Intelligent detection of cracks in metallic surfaces using a waveguide sensor loaded with metamaterial elements, Sensors, 15(5), 2015, 11402 - 11416
  • Alavikia, Babak and Kabiri, Ali and Ramahi, Omar M, Poynting theorem constraints on the signs of the imaginary parts of the electromagnetic constitutive parameters, JOSA A, 32(4), 2015, 522 - 532
  • Ruphuy, Miguel and Ramahi, Omar M, Analytical models for electrically thin flat lenses and reflectors, JOSA A, 32(4), 2015, 507 - 513
  • ALI, AM and RAMAHI, OM, Detecting and Locating Defects in Coated Metallic Structures Using Arrays of Small Microwave Resonators, Structural Health Monitoring 2015, 2015
  • Alavikia, Babak and Kabiri, Ali and Ramahi, Omar M, Poynting theorem constraints on the signs of the imaginary parts of the electromagnetic constitutive parameters: reply, JOSA A, 32(8), 2015, 1566 - 1566
  • Ramzan, R and Siddiqui, O and Nauroze, A and Ramahi, O, A Microstrip Probe Based on Electromagnetic Energy Tunneling for Extremely Small and Arbitrarily Shaped Dielectric Samples, IEEE Antennas and Wireless Propagation Letters, 14, 2015, 1554 - 1556
  • Almoneef, Thamer S and Ramahi, Omar M, Metamaterial electromagnetic energy harvester with near unity efficiency, Applied Physics Letters, 106(15), 2015
  • Alavikia, Babak and Almoneef, Thamer S and Ramahi, Omar M, Complementary split ring resonator arrays for electromagnetic energy harvesting, Applied Physics Letters, 107(3), 2015
  • Ramzan, R and Siddiqui, O and Nauroze, A and Ramahi, O, A Microstrip Probe Based on Electromagnetic Energy Tunneling for Extremely Small and Arbitrarily Shaped Dielectric Samples, IEEE Antennas and Wireless Propagation Letters, 14, 2015, 1554 - 1556
  • Siddiqui, Omar and Kashanianfard, Mani and Ramahi, Omar, Dielectric sensors based on electromagnetic energy tunneling, Sensors, 15(4), 2015, 7844 - 7856
  • Alavikia, Babak and Almoneef, Thamer S and Ramahi, Omar M, Wideband resonator arrays for electromagnetic energy harvesting and wireless power transfer, Applied Physics Letters, 107(24), 2015
  • Almoneef, Thamer and Ramahi, Omar M, Split-Ring Resonator Arrays for Electromagnetic Energy Harvesting, Progress In Electromagnetics Research B, 62, 2015, 167 - 180
  • Tao, Bo and Sun, Hu and Ramahi, Omar M, RFID Tag Antenna for Metallic or Non-Metallic Surfaces, Progress In Electromagnetics Research C, 59, 2015, 51 - 57
  • Ashoor, Ahmed Z and Ramahi, Omar M, Dielectric resonator antenna arrays for microwave energy harvesting and far-field wireless power transfer, Progress In Electromagnetics Research C, 59, 2015, 89 - 99
  • Ruphuy, Miguel and Siddiqui, Omar and Ramahi, Omar M, Electrically thin flat lenses and reflectors, JOSA A, 32(9), 2015, 1700 - 1706
  • Kabiri, Ali and Ramahi, Omar M, Generic Building Blocks for Construction of Artificial Magnetic Media, Progress In Electromagnetics Research B, 62, 2015, 17 - 28
  • Albishi, Ali and Ramahi, Omar M, Detection of surface and subsurface cracks in metallic and non-metallic materials using a complementary split-ring resonator, Sensors, 14(10), 2014, 19354 - 19370
  • Ruphuy, Miguel and Ren, Zhao and Ramahi, Omar M, Flat far field lenses and reflectors, Progress In Electromagnetics Research M, 34, 2014, 163 - 170
  • Mohajer-Iravani, Baharak and Ramahi, Omar M, On the Suppression Band and Bandgap of Planar Electromagnetic Bandgap Structures, International Journal of Antennas and Propagation, 2014, 2014
  • Hu, Bing and Ren, Zhao and Boybay, Muhammed S and Ramahi, Omar M, Waveguide Probe Loaded With Split-Ring Resonators for Crack Detection in Metallic Surfaces, IEEE Transactions on Microwave Theory and Techniques, 62(4), 2014, 871 - 878
  • Almoneef, Thamer and Ramahi, Omar M, A 3-dimensional stacked metamaterial arrays for electromagnetic energy harvesting, Progress In Electromagnetics Research, 146, 2014, 109 - 115
  • Bait-Suwailam, Mohammed M and Alavikia, Babak and Ramahi, Omar M, Reduction of Electromagnetic Radiation from Apertures and Enclosures Using Electromagnetic Bandgap Structures, IEEE Transactions on Components, Packaging and Manufacturing Technology, 4(5), 2014, 929 - 937
  • AlShareef, Mohammed R and Ramahi, Omar M, Electrically small particles combining even-and odd-mode currents for microwave energy harvesting, Applied Physics Letters, 104(25), 2014
  • Ren, Zhao and Kabiri, Ali and Ramahi, Omar M, Detection of Localized Magnetostatic Surface Resonant Spheres, IEEE Transactions on Magnetics, 50(10), 2014, 1 - 7
  • Alavikia, Babak and Almoneef, Thamer S and Ramahi, Omar M, Electromagnetic energy harvesting using complementary split-ring resonators, Applied Physics Letters, 104(16), 2014
  • Alhazmi, FM and Ramahi, OM and Irannejad, M and Brzezinski, A and Yavuz, M and others, NSTOA-13-RA-108 Comparison of the Effects of Varying of Metal Electrode in Metal-Insulator-Metal Diodes with multi-dielectric layers, Austin J Nanomed Nanotechnol, 2(2), 2014
  • Nayyeri, Vahid and Soleimani, Mohammad and Ramahi, Omar M, A method to model thin conductive layers in the finite-difference time-domain method, IEEE Transactions on Electromagnetic Compatibility, 56(2), 2014, 385 - 392
  • Nayyeri, Vahid and Soleimani, Mohammad and Ramahi, Omar M, Modeling graphene in the finite-difference time-domain method using a surface boundary condition, IEEE Trans. Antennas Propag, 61(8), 2013, 4176 - 4182
  • Bait-Suwailam, Mohammed M and Yousefi, Leila and Alavikia, Babak and Ramahi, Omar M, Analytical models for predicting the effective permittivity of complementary metamaterial structures, Microwave and Optical Technology Letters, 55(7), 2013, 1565 - 1569
  • Boybay, Muhammed S and Ramahi, Omar M, Non-destructive thickness measurement using quasi-static resonators, IEEE Microwave and Wireless Components Letters, 23(4), 2013, 217 - 219
  • Alavikia, Babak and Soltani, Nima and Ramahi, Omar M, Efficient 2-D Finite-Difference Frequency-Domain Method for Switching Noise Analysis in Multilayer Boards, IEEE Transactions on Components, Packaging and Manufacturing Technology, 3(5), 2013, 841 - 848
  • Ramahi, Omar M and Almoneef, Thamer S and AlShareef, Mohammed and Boybay, Muhammed S, Publisher’s Note:“Metamaterial particles for electromagnetic energy harvesting”[Appl. Phys. Lett. 101, 173903 (2012)], Applied Physics Letters, 103(26), 2013
  • AlShareef, Mohammed R and Ramahi, Omar M, Electrically small resonators for energy harvesting in the infrared regime, Journal of Applied Physics, 114(22), 2013
  • Ramahi, Omar M, Material characterization using complementary split-ring resonators (vol 61, pg 3039, 2012), IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 62(6), 2013, 1866 - 1866
  • Aydinoglu, F and Alhazmi, M and Cui, B and Ramahi, OM and Irannejad, M and Brzezinski, A and Yavuz, M, Higher performance metal-insulator-metal diodes using multiple insulator layers, Austin J. Nanomed. Nanotechnol, 1, 2013
  • Attia, Hussein and Siddiqui, Omar F and Suwan, Na'el and Ramahi, Omar M, Analytical and experimental study of gain enhancement in antenna arrays covered with high index metamaterial superstrate, Microwave and Optical Technology Letters, 55(1), 2013, 215 - 218
  • Attia, Hussein and Siddiqui, Omar and Ramahi, Omar, Beam tilting of single microstrip antenna using high permittivity superstrate, Microwave and Optical Technology Letters, 55(7), 2013, 1657 - 1661
  • Nayyeri, Vahid and Soleimani, Mohammad and Ramahi, Omar M, Wideband modeling of graphene using the finite-difference time-domain method, IEEE Transactions on Antennas and Propagation, 61(12), 2013, 6107 - 6114
  • Kabiri, Ali and Ramahi, Omar M, Artificial magnetic materials synthesis with generic metallic broken loops, Progress In Electromagnetics Research, 140, 2013, 105 - 129
  • Boybay, Muhammed Said and Ramahi, Omar M, Erratum to" Material characterization using complementary split-ring resonators", IEEE Transactions on Instrumentation and Measurement, 6(62), 2013
  • Attia, Hussein and Siddiqui, Omar F and Suwan, Na'el and Ramahi, Omar M, Analytical and experimental study of gain enhancement in antenna arrays covered with high index metamaterial superstrate, Microwave and Optical Technology Letters, 55(1), 2013, 215 - 218
  • El Badawe, Mohamed and Ramahi, Omar, Polarization independent metasurface energy harvester, 2016 IEEE 17th Annual Wireless and Microwave Technology Conference (WAMICON), January 2016, 1 - 3
  • Albishi, Ali M and Ramahi, Omar M, Surface crack detection in metallic materials using sensitive microwave-based sensors, 2016 IEEE 17th Annual Wireless and Microwave Technology Conference (WAMICON), January 2016, 1 - 3
  • AlShareef, Mohammed R and Ramahi, Omar, Extraordinary terahertz transmission through electrically small particles, SPIE Nanoscience+ Engineering, January 2015
  • AlShareef, Mohammed R and Ramahi, Omar, Energy Harvesting in the Microwaves Spectrum Using Electrically Small Resonators, International Congress on Energy Efficiency and Energy Related Materials (ENEFM2013), January 2014, 265 - 272
  • AlShareef, Mohammed R and Ramahi, Omar M, Electrically small particles for harvesting and channeling infrared energy, 2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM), January 2014
  • Almoneef, Thamer S and Ramahi, Omar M, Can split-Ring Resonators be viable for electromagnetic energy harvesting?, 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), January 2014, 424 - 425
  • Ali, Abdulbaset M and Ramahi, Omar M and Boybay, Muhammed S, Measurement of paint and coating thickness on metallic plates using smart near field microwave sensor, 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), January 2014, 916 - 917
  • Sidiqui, O and Nauroze, A and Ramzan, R and Ramahi, O, 430.7: TUNNELING OF ELECTROMAGNETIC ENERGY THROUGH WIRES IN GUIDED MEDIA, INTERNATIONAL SYMPOSIUM DIGEST ANTENNAS AND PROPAGATION, January 2013, 1370 - 1371
  • Sidiqui, Omar and Nauroze, Abdullah and Ramzan, Rashad and Ramahi, Omar, Tunneling of electromagnetic energy through wires in guided media, 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), January 2013, 1370 - 1371
  • Ren, Zhao and Kabiri, Ali and Ramahi, Omar M, A probe for detecting magnetostatic surface resonant spheres, 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), January 2013, 1186 - 1187
  • Alavikia, B and Ramahi, O, 433.4: ANALYSIS OF THE SIGNS OF IMAGINARY PARTS OF THE EFFECTIVE CONSTITUTIVE PARAMETERS IN METAMATERIALS, INTERNATIONAL SYMPOSIUM DIGEST ANTENNAS AND PROPAGATION, January 2013, 1424 - 1425
  • Almoneef, Thamer S and Ramahi, Omar M, Harvesting electromagnetic energy using metamaterial particles, 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), January 2013, 1046 - 1047
  • Nayyeri, V and Soleimani, M and Ramahi, O, 325.6: EFFECTIVE MODELING OF GRAPHENE AS A CONDUCTING SHEET IN THE FINITE-DIFFERENCE TIME-DOMAIN METHOD, INTERNATIONAL SYMPOSIUM DIGEST ANTENNAS AND PROPAGATION, January 2013, 906 - 906
  • Almoneef, T and Ramahi, O, 337.5: HARVESTING ELECTROMAGNETIC ENERGY USING METAMATERIAL PARTICLES, INTERNATIONAL SYMPOSIUM DIGEST ANTENNAS AND PROPAGATION, January 2013, 1046 - 1046
  • Alavikia, Babak and Ramahi, Omar M, Analysis of the signs of imaginary parts of the effective constitutive parameters in metamaterials, 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), January 2013, 1424 - 1425
  • Nayyeri, Vahid and Soleimani, Mohammad and Ramahi, Omar M, Effective modeling of graphene as a conducting sheet in the Finite-Difference Time-Domain method, 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), January 2013, 906 - 907
  • Ren, Z and Kabiri, A and Ramahi, O, 410.6: A PROBE FOR DETECTING MAGNETOSTATIC SURFACE RESONANT SPHERES, INTERNATIONAL SYMPOSIUM DIGEST ANTENNAS AND PROPAGATION, January 2013, 1186 - 1186
  • Ramahi, Omar and Almoneef, Thamer and AlShareef, Mohammed, Metamaterial Particles for Electromagnetic Energy Harvesting, January