A time-domain method for measuring the reflection coefficient of microwave absorbers at frequencies below 1 GHz

Author

Ondrejka, A.R. ; Kanda, M.

Author_Institution

Nat. Inst. for Stand. & Technol., Boulder, CO, USA

fYear

1991

fDate

24-28 June 1991

Firstpage

1656

Abstract

A wideband time-domain reflectometer has been developed to measure the reflection coefficient of RF/microwave absorbers. The advantage of using a time-domain approach is that reflections from various parts of the test chamber can be separated from one another by the differences in their time of arrival at the receiving antenna. The resultant response waveform from a fire-retardant 940-mm rotated pyramid absorber after processing is complete is shown. In addition, measurement results are presented for a non-fire retardant and a fire retardant, 660-mm long pyramid.<>

Keywords

electromagnetic compatibility; electromagnetic wave reflection; microwave reflectometry; time-domain reflectometry; 30 to 1000 MHz; UHF; VHF; fire-retardant absorbers; microwave absorbers; nonfire-retardant absorbers; rotated pyramid absorber; time domain method; wideband time-domain reflectometer; Antenna measurements; Microwave measurements; Radio frequency; Receiving antennas; Reflection; Reflector antennas; Retardants; Testing; Time domain analysis; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1991. AP-S. Digest

Conference_Location

London, Ontario, Canada

Print_ISBN

0-7803-0144-7

Type

conf

DOI

10.1109/APS.1991.175174

Filename

175174