The College of Electronics Engineering at the University of Ninevah / Department of Communications Engineering held a Master’s thesis defense titled:
“Development of Wide-Band Microwave Absorbers”
on Thursday, September 25, 2025, by the student Aya Raad Thanon Mohammed Ali.
The Dean of the College, Professor Dr. Khalid Khalil Mohammed, attended part of the defense.
The thesis presented a comprehensive study of the performance of microwave absorber panels made from materials with specific electrical and magnetic properties. It included an in-depth analysis of the effect of permittivity, permeability, and loss tangent on the reflectivity of these panels.
The research addressed several aspects, including the impact of surface geometry and panel dimensions on absorption performance, the influence of the angle of incidence and polarization direction of electromagnetic waves, and the use of absorber panels backed with conductive sheets commonly applied in shielded anechoic chambers. The study made extensive use of the CST Microwave Studio Suite simulation tool, within a frequency range of 1 to 10 GHz.
The researcher proposed an innovative design based on a hemispherical shape mounted on a square base, as an alternative to the traditional pyramidal structure. Simulations showed that this new design exhibited highly competitive performance, despite having the same overall thickness.
The thesis also introduced hybrid absorber panels with equal permittivity and permeability, achieving ideal impedance matching with air, which significantly reduced wave reflections.
The thesis led to the publication of three scientific papers:
1. A paper published in a Scopus-indexed journal: Journal of Telecommunications and Information Technology.
2. A paper presented at the international conference ICEEE 2025, to be published later by the organizing body.
3. A paper published in a Scopus-indexed journal: Progress In Electromagnetics Research B.
The examination committee consisted of:
1. Asst. Prof. Dr. Yasser Ahmed Fadel – College of Engineering / University of Duhok – (Chair).
2. Asst. Prof. Dr. Ahmed Mohammed Ahmed – College of Electronics Engineering / University of Ninevah – (Member).
3. Dr. Adham Maan Saleh – College of Electronics Engineering / University of Ninevah – (Member).
4. Prof. Dr. Khalil Hassan Sayed Mar’i – Professor Emeritus / College of Electronics Engineering / University of Ninevah – (Member and Supervisor).
The College of Electronics Engineering extends its sincere congratulations to the student Aya Raad Thanon Mohammed Ali, wishing her continued success in her academic and scientific journey. We also express our appreciation to the esteemed examination committee for their valuable support and feedback.
