Title :
An automated amplitudes-only measurement system for permittivity determination using free-space method
Author :
Akay, M.F. ; Kharkovsky, S.N. ; Hasar, U.C.
Author_Institution :
Dept. of Electr. & Electron. Eng., Cukurova Univ., Adana, Turkey
Abstract :
An automated PC based free-space system for determining the permittivity of high-loss materials is proposed. The main feature of the system is to measure only the amplitudes of transmission and reflection coefficients using free-space method and determine the permittivity dynamically using a computer. Firstly, the expressions for the reflection and transmission coefficients involving the permittivity of the high-loss material are derived. Then these equations are solved together by using the halving method. In order to measure the amplitudes of reflection and transmission coefficients, a simple and inexpensive microwave measurement system is established. The parallel port is used as an interface between the computer and the designed control circuit. A software program is developed for the treatment of the measured signal amplitudes and determination the permittivity of high-loss materials
Keywords :
computerised instrumentation; electrical engineering computing; microwave measurement; permittivity measurement; physics computing; PC based free-space system; automated amplitudes-only measurement system; control circuit; high-loss materials; microwave measurement system; parallel port interface; permittivity determination; ray tracing; reflection coefficients; software program; transmission coefficient; Automation; Circuits; Conducting materials; Dielectric materials; Dielectric measurements; Microwave devices; Microwave measurements; Microwave theory and techniques; Permittivity measurement; Reflection;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928870
