Tracking measurements of a high-power time-varying microwave impedance using three fixed probes

Author

HU, Chia-Lun J.

Author_Institution

Dept. of Electr. Eng., Southern Illinois Univ., Carbondale, IL, USA

fYear

1988

fDate

20-22 Apr 1988

Firstpage

265

Lastpage

268

Abstract

A three-probe system with improved analog signal processing is presented. The system was used to make tracking measurements of the changing complex impedance (or complex reflection coefficient) of a time-varying load operated at power levels from 2.5 to 20 W. A compound load consisting of a magic T, a matched load, a sliding short, and a fixed short was used. The variation of the complex reflection coefficient of this compound load was recorded in real time when the sliding short was moved in and out. The dynamic range of this tracking measurement system covers the range from at least 10 mW to 20 W

Keywords

electric impedance measurement; microwave measurement; signal processing; 2.5 to 20 W; analog signal processing; complex impedance; complex reflection coefficient; dynamic range; fixed probes; fixed short; high-power time-varying microwave impedance; magic T; matched load; real time; sliding short; three-probe system; time-varying load; tracking measurements; Dielectric measurements; Electromagnetic heating; Impedance measurement; Low pass filters; Microwave measurements; Power harmonic filters; Power measurement; Probes; Real time systems; Reflection;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1988. IMTC-88. Conference Record., 5th IEEE

Conference_Location

San Diego, CA

Type

conf

DOI

10.1109/IMTC.1988.10863

Filename

10863