David Santiago received the Telecommunication Engineering, M.Sc. and Ph.D. degrees from the Electrical, Electronic and Communications Engineering Department, Public University of Navarre (UPNA), Pamplona, in 2017, 2019 and 2024, respectively.From December 2022 to April 2023, I was a visiting researcher in the Chalmers University of Technology, Gothenburg, Sweden, where I was involved in the modeling and design of passive components and antennas at microwave and millimeter-wave frequencies.I am currently a R&F Engineer with Anteral S.L. My job is related to the design of passive components and antennas for communications satellites, and the research on periodic structure devices for microwave, millimeter-wave, terahertz frequency ranges.Google Scholar: https://scholar.google.com/citations?user=79eiPVwAAAAJ&hl=en&oi=sraORCID: https://orcid.org/my-orcid?orcid=0000-0002-3122-3392