**About the Special Issue Editors**

**Raed A. Abd-Alhameed** (M'02–SM'13) received B.Sc. and M.Sc. degrees from Basrah University, Basrah, Iraq, in 1982 and 1985, respectively, and the PhD degree from the University of Bradford, West Yorkshire, U.K., in 1997. Raed Abd-Alhameed is Professor of Electromagnetic and Radio Frequency Engineering at the University of Bradford, UK. He has long years' research experience in the areas of Radio Frequency, Signal Processing, propagations, antennas and electromagnetic computational techniques, and has published over 600 academic journal and conference papers; in addition, he is co-authors of four books and several book chapters. At present, he is the leader of Radio Frequency, Propagation, sensor design and Signal Processing in addition to leading the Communications research group for years within the School of Engineering and Informatics, Bradford University, UK. He is the Principal Investigator for several funded applications to EPSRCs and leader of several successful knowledge Transfer Programmes, such as with Arris (previously known as Pace plc), Yorkshire Water plc, Harvard Engineering plc, IETG ltd, Seven Technologies Group, Emkay ltd, and Two World ltd including many Research Development Projects awards supported by Regional European funds. He has also been a co-investigator in several funded research projects, including 1) H2020 MARIE Skłodowska-CURIE ACTIONS: Innovative Training Networks (ITN) "Secure Network Coding for Next Generation Mobile Small Cells 5G-US", 2) Nonlinear and demodulation mechanisms in biological tissue (Dept. of Health, Mobile Telecommunications & Health Research Programme), and 3) Assessment of the Potential Direct Effects of Cellular Phones on the Nervous System (EU: collaboration with six other major research organizations across Europe). He was awarded the Business Innovation Award for his successful KTP with Pace and Datong companies on the design and implementation of MIMO sensor systems and antenna array design for service localizations. He is the chair of several successful workshops on Energy Efficient and Reconfigurable Transceivers (EERT): Approach towards Energy Conservation and CO2 Reduction that addresses the biggest challenges for future wireless systems. He has also been appointed as a guest editor for the IET Science, Measurements and Technology Journal since 2009 and 2012. He is also a research visitor for Wrexham University, Wales, since Sept 2009, covering the wireless and communications research areas. His interests lie in 5G Green Communications Systems, computational methods and optimizations, wireless and mobile communications, sensor design, EMC, MIMO systems, beam steering antennas, energy-efficient PAs, RF predistorter design applications. He is a fellow of the Institution of Engineering and Technology, a fellow of the Higher Education Academy and a chartered engineer.

**Issa Elfergani** received M.Sc. and Ph.D. degrees in electrical and electronic engineering from the University of Bradford, U.K., in 2008 and 2012, respectively, with a specialization in tunable antenna design for mobile handset and UWB applications. He is currently a Senior Researcher with the Instituto de Telecomunicac¸oes, Aveiro, Portugal, working with several national and ˜ international research funded projects, such as ENIAC ARTEMIS from 2011 to 2014; EUREKA BENEFIC from 2014 to 2017; CORTIF from 2014 to 2017; GREEN-T from 2011 to 2014; VALUE from 2016 to 2016; H2020-SECRET Innovative Training Network from 2017 to 2020. Since his Ph.D. graduation, he has successfully completed the supervision of several Master and Ph.D. students. He has around 100 high-impact publications in academic journals and international conferences; in addition, he is the author of two book editorial and nine book chapters. He has been on the technical program committee of a large number of IEEE conferences. He has several years of experience in 3G/4G and 5G radio frequency systems research with particular expertise on several and different antenna structures along with novel approaches in accomplishing a size reduction, low cost, improved bandwidth, and gain and efficiency. His expertise includes research in various antenna designs, such as MIMO, UWB, balanced and unbalanced mobile phone antennas, RF tunable filter technologies, and power amplifier designs. In 2014, he received prestigious FCT fellowship for his postdoctoral research. He is also the IEEE and an American Association for Science and Technology (AASCIT) member. He reviewed several highly ranked journals, such as the IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, the IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, IET MICROWAVES, ANTENNAS AND PROPAGATION, IEEE ACCESS, Transactions on Emerging Telecommunications Technologies, Radio Engineering Journal, IET-SMT, the IET Journal of Engineering. He was the Chair of both 4th and 5th International Workshop on Energy Efficient and Reconfigurable Transceivers (EERT). He is also a Guest Editor of the Hindawi Special Issue "Antenna Design Techniques for 5G Mobile Communications and Electronics", a Special Issue on "Recent Technical Developments in Energy-Efficient 5G Mobile Cells", and a Special Issue on " Recent Advances in Antenna Design for 5G Heterogeneous Networks"

**Jonathan Rodriguez** received his Master's degree in Electronic and Electrical Engineering and Ph.D. from the University of Surrey (UK), in 1998 and 2004, respectively. In 2005, he became a researcher at the Instituto de Telecomunicac¸oes (Portugal) where he was a member of the Wireless ˜ Communications Scientific Area. In 2008, he became a Senior Researcher where he established the 4TELL Research Group targeting next-generation mobile systems. He has served as a project coordinator for major international research projects, including Eureka LOOP and FP7 C2POWER whilst serving as technical manager for FP7 COGEU and FP7 SALUS. He is currently the coordinator of the H2020-SECRET Innovative Training Network. Since 2009, he has served as Invited Assistant Professor at the University of Aveiro (Portugal) and attained Associate Level in 2015. In 2017, he was appointed the Professor of Mobile Communications at the University of South Wales (UK). He is author of more than 400 scientific works, including 10 book editorials. His professional affiliations include Senior Member of the IEEE and Chartered Engineer (CEng) since 2013 and Fellow of the IET (2015).
