1. Doctoral Thesis. LÁZARO GUILLÉN, ANTONIO RAMON (Director) ; GIRBAU SALA, DAVID (Co-director) Doctoral student: Marc Lázaro Martí (2023). Long-Range backscattering ring communications for next generation IoT applications.
2. Doctoral Thesis. LÁZARO GUILLÉN, ANTONIO RAMON (Director) ; GIRBAU SALA, DAVID (Co-director) Doctoral student: Marti Boada Navarro (2021). BATTERY-LESS NEAR FIELD COMMUNICATIONS (NFC) SENSORS FOR INTERNET OF THINGS (IoT) APPLICATIONS.
3. Doctoral Thesis. LÁZARO GUILLÉN, ANTONIO RAMON (Director) ; GIRBAU SALA, DAVID (Co-director) Doctoral candidate: Stefano Milici (2018). ANALYSIS OF WIRELESS BODY-CENTRIC MEDICAL SENSORS FOR REMOTE HEALTHCARE. Urv.
4. Doctoral Thesis. LÁZARO GUILLÉN, ANTONIO RAMON (Director) ; GIRBAU SALA, DAVID (Co-director) Doctoral student: Javier Lorenzo Galera (2017). ADVANCED WIRELES SYSTEMS FOR IDENTIFICATION, SENSING AND LOCALIZATION.
5. Doctoral Thesis Proposal. GIRBAU SALA, DAVID (Director) ; LÁZARO GUILLÉN, ANTONIO RAMON (Director) Doctoral student: Angel Ramos Felix (2015). Application of ultra-wide band technology to RFID and wireless sensors. Rovira i Virgili University.
6. Doctoral Thesis. LÁZARO GUILLÉN, ANTONIO RAMON (Author or Co-Author) ; Antonio Lázaro Guillén (Director) Doctoral student: Bogdan Mihai Nae (2011). Compact modeling of the rf and noise behavior of multiple-gate mosfets. Rovira i Virgili University.
7. Doctoral Thesis. LÁZARO GUILLÉN, ANTONIO RAMON (Director) Doctoral student: David Girbau Sala (2006). Mems switches and capacitors for microwave communication systems. Polytechnic University of Catalonia.
8. Doctoral Thesis. LÁZARO GUILLÉN, ANTONIO RAMON (Director) Doctoral student: María del Carmen Maya (2003). Measurement of noise parameters of active devices, based on matched source. Polytechnic University of Catalonia