|Tipo di tesi||Tesi di laurea magistrale|
|Titolo||Complex permittivity measurement techniques of solid and liquid materials at microwave frequencies|
|Titolo in inglese||Complex permittivity measurement techniques of solid and liquid materials at microwave frequencies|
|Struttura||Dipartimento di Ingegneria|
|Corso di studi||ELECTRONICS ENGINEERING - Ingegneria Elettronica (D.M.270/04)|
|Data inizio appello||2018-04-12|
|Disponibilità||Accesso limitato: si può decidere quali file della tesi rendere accessibili. Disponibilità mixed (scegli questa opzione se vuoi rendere inaccessibili tutti i file della tesi o parte di essi)|
|Data di rilascio||2058-04-12|
The measurement of the materials dielectric permittivity is nowadays required in the industrial field and is very useful in what is concerning the microwave sector.
The measurement of the materials dielectric permittivity is nowadays required in the industrial field and is very useful in what is concerning the microwave sector. In this thesis different existing measurement techniques are analyzed and compared. Some of them are exploited for the characterization of two materials: an hydraulic oil, new and used, and a specific crop sample. In particular the performed techniques are: the coaxial probe and the resonant cavity one. For the first is used the commercial sensor HP85070B. For the second technique two different types of cavities are considered: a preexistent cylindrical resonant cavity and a coaxial resonant cavity. The cylindrical cavity is initially studied through simulation for discover the best ways of using it, then the measurements are performed. The coaxial resonant cavity is designed for satisfies different parameters such as the frequency range. Finally, an analysis of the obtained data and possible future improvements are given.