The International Telecommunication Union (ITU), a specialised agency of the United Nations, is responsible for coordinating the global use of the radio spectrum and satellite orbits. Through its Radiocommunication Sector (ITU-R), it also develops international recommendations and technical reports that enable wireless applications to operate efficiently, safely and without harmful interference. These deliverables underpin everything from mobile and fixed networks, broadcasting, and satellite networks to aviation, maritime, defence, and emerging technologies.
As a long-standing provider of spectrum management and radio engineering solutions, ATDI actively contributes to ITU-R's work to help shape the technical regulations that define the future of radiocommunications. Our involvement ensures ATDI software and services remain aligned with the latest international developments while allowing us to share practical engineering expertise gained from supporting spectrum regulators, network operators and critical infrastructure organisations worldwide.
Dr Haim Mazar
ATDI's contributions are led by Dr Haim Mazar, one of the industry's most respected spectrum management specialists. Since joining ATDI in 2015, Dr Mazar has continued a distinguished career spanning more than four decades in radio spectrum policy, engineering and international standardisation. He serves as Vice Chair of ITU-R Study Group 3 (Radio-wave propagation), Vice Chairman of Working Party 5C, and Chair of Working Group 5C-3, while contributing across multiple ITU-R Study Groups and Working Parties. He has authored more than 260 technical contributions to the ITU-R and wrote the widely recognised reference book Radio Spectrum Management: Policies, Regulations, Standards and Techniques.
Beyond his professional achievements, Dr Mazar is an enthusiastic scholar with a lifelong interest in culture, history, languages and nature. He is also a keen football player, bringing the same passion and commitment to international collaboration that has made him a recognised figure within the global spectrum management community. His extensive experience and active leadership within the ITU-R continue to strengthen ATDI's role in developing the international regulations that shape the future of wireless communications.
Updates/Contributions
June 2026
ATDI remains actively engaged in the work of ITU-R Study Group 5, contributing to the ongoing development of international recommendations and reports for the Fixed Service. During the latest 18-29 May period meetings, our expert Dr Mazar, serving as vice chair of Working Party 5C and chair of Working Group 5C-3, provided key technical contributions, including revisions:
These activities demonstrate ATDI's continued commitment to advancing spectrum engineering, supporting emerging technologies, and helping shape the future of international radiocommunication deliverables.
