José R. Montejo-Garai was born in Vitoria-Gasteiz, Spain, in 1965. He received Ingeniero de Telecomunicación and Ph.D. degrees from the Universidad Politécnica de Madrid, Madrid, Spain, in 1990 and 1994, respectively. Since 1989, he has been with the Grupo de Electromagnetismo Aplicado y Microondas, Universidad Politécnica de Madrid, as an Assistant Professor until 1996 and as an Associate Professor until 2017, where he is currently a Full Professor. His current research interests include the analysis and characterization of wave-guide structures, advanced synthesis theory, and computer-aided design for microwave and millimeter-wave passive devices: filters, multiplexers, orthomode transducers, and beamforming networks. He has designed plenty of passive microwave devices for communication satellites.