An Automatic Antenna Tuning System Using Only RF Signal Amplitudes. - Ettore Lorenzo Firrao; Bram Nauta (IEEE Trans. Circuits Syst. II Express Briefs, 2008)

On the Minimum Number of States for Switchable Matching Networks. - Ettore Lorenzo Firrao; Anne-Johan Annema; Frank E. van Vliet; Bram Nauta (IEEE Trans. Circuits Syst. I Regul. Pap., 2015)

Hardware Implementation Overhead of Switchable Matching Networks. - Ettore Lorenzo Firrao; Anne-Johan Annema; Frank E. van Vliet; Bram Nauta (IEEE Trans. Circuits Syst. I Regul. Pap., 2017)