**About the Editors**

## **Armando Fernandez-Prieto**

Armando Fernandez-Prieto was born in Ceuta, Spain, in September 1981. He received the Licenciado and Ph.D. degrees in physics from the Universidad de Sevilla, Seville, Spain, in 2007 and 2013, respectively. During 2010 he was a visiting researcher at Heriot-Watt University, Edinburgh, UK, at Prof. Jiasheng Hong's group where he was involved in the design of multilayer LCP balanced microwave filters. He was also visiting researcher in 2017 at Universidad Autonoma ´ de Barcelona, Barcelona, Spain at CIMITEC under Prof. Ferran Mart´ın's supervision. During this period Dr. Fernandez-Prieto was involved in the design of microwave sensors, slow-wave ´ structures and balanced-to-balanced planar diplexers. From 2018 to 2022 Dr. Fernandez-Prieto was ´ Assistant Professor of electromagnetism with the Department of Electronics and Electromagnetism, University of Seville. Nowadays, he is currently an Associate Professor of electromagnetism with the Department of Electronics and Electromagnetism, University of Seville, and still a member of the Microwaves Group. His research interests focus on printed passive microwave components, applications on filter theory to the design of microwave antennas and metamaterials. Dr. Fernandez-Prieto was awarded in 2015 and 2017 with the best research paper prize from ´ University of Seville in the areas of Engineering and Science, respectively.

#### **Alejandro Javier Martinez-Ros**

Alejandro Javier Martinez-Ros was born in Cartagena, Spain, in 1981. He received the Telecommunication Engineer and Ph.D. degrees from the Universidad Politecnica de Cartagena ´ (UPCT), Cartagena, Spain, in 2005 and 2014, respectively. During 2006, he worked as an RF Engineer at the IMST GmbH in Kamp-Lintfort, Germany, where he was involved with the development of EBG structures for high-precision antennas for the Galileo system, and with phase array and patch antennas for global navigation satellite systems. In 2007, he moved to Spain and worked as a Research Engineer in a naval company, where he participated in the design of submarine telecommunication systems based on underwater acoustics. In 2008, he joined the Telecommunication and Electromagnetic Group (GEAT), UPCT, as a Research Assistant. He has been a visiting Ph.D. student at the Queen's University Belfast, Northern Ireland, U.K. and a Postdoctoral Researcher in the Microwave Laboratory, University of Pavia, Pavia, Italy. Currently, he is Associate Professor in the Microwave Group of the Universidad de Sevilla, Seville, Spain. His scientific research is mainly focused on the analysis and synthesis of leaky-wave devices for microwave and millimeter waveband applications. Dr. Mart´ınez-Ros was awarded in 2015 with the best doctoral thesis prize from UPCT and the best doctoral thesis from COIT-HISDESAT. He is the coauthor of the best student paper at the 2013 URSI Symposium, finalist for the best student paper at the 2013 AP-S/URSI, recipient of a travel grant at the 2011 IEEE MTT-S IMWS, and of the second prize for the best student paper at the 2012 URSI Symposium.
