Low noise Ku-band drain mixer using P-HEMT technology. - Maria Luisa de la Fuente; Joaquín Portilla; Eduardo Artal (ICECS, 1998)

High-performance monolithic amplifiers in low microwave bands using GaAs MESFET technology. - Joaquín Portilla; Juan Pablo Pascual; Héctor García; Eduardo Artal (ICECS, 1998)

Hysteresis prediction in autonomous microwave circuits using commercial software: application to a Ku-band MMIC VCO. - Enrique Palazuelos; Almudena Suárez; Joaquín Portilla; Francisco Javier Barahona (IEEE J. Solid State Circuits, 1998)

High power-added efficiency MMIC amplifier for 2.4 GHz wireless communications. - Joaquín Portilla; Héctor García; Eduardo Artal (IEEE J. Solid State Circuits, 1999)

Analysis of microwave frequency dividers in harmonic-balance simulators. - Aitziber Anakabe; Juan-Mari Collantes; Almudena Suárez; Josu Jugo; Joaquín Portilla (ICECS, 2001)

Frequency-Domain Identification and Model-Order Selection for Efficiently Simulating Microwave Radiometers. - Francisco J. Casas; Juan Pablo Pascual; Maria Luisa de la Fuente; Eduardo Artal; Joaquín Portilla (Comput. Sci. Eng., 2012)

Electronic interface for position sensing using resonant cavities. - Estibaliz Asua; Victor Etxebarria; Alfredo García-Arribas; Jorge Feutchwanger; Joaquín Portilla; Julio Lucas (IWASI, 2013)

A Novel Micro- and Nano-Scale Positioning Sensor Based on Radio Frequency Resonant Cavities. - Estibaliz Asua; Victor Etxebarria; Alfredo García-Arribas; Jorge Feutchwanger; Joaquín Portilla; Julio Lucas (Sensors, 2014)

Efficient Reconstruction of Narrowband Signals Using Multifrequency Undersampling Techniques. - Jon Vivas-Merino; Inari Badillo; Joaquín Portilla; Iñigo Arredondo; Josu Jugo; Jorge Feuchtwanger (IEEE Trans. Instrum. Meas., 2025)