Ultra-fast broadband EMI measurement in time domain using classical spectral estimation

Author

Krug, F. ; Russer, P.

Author_Institution

Lehrstuhl fur Hochfrequenztech., Technische Univ. Munchen, Germany

Volume

3

fYear

2002

fDate

2-7 June 2002

Firstpage

2237

Abstract

In this paper, a novel ultra-fast, broadband time domain EMI measurement system is described. Measurements were performed in the 30-1000 MHz range. The signals from the antenna are digitized and processed by computer in order to obtain Fast-Fourier Transform (FFT) as well as Welch and Bartlett Periodograms. Correction of errors originating from the frequency characteristics of antenna, cable and oscilloscope is made by digital signal processing. With the presented time domain measurement system, the measurement time can be reduced by a factor of 10. The results obtained with the described system have been compared with measurements performed with a conventional EMI receiver. Over the whole frequency range from 30 to 1000 MHz the deviations have been below 3 dB.

Keywords

UHF measurement; electric noise measurement; electromagnetic interference; error correction; fast Fourier transforms; signal processing; spectral analysis; 30 to 1000 MHz; Bartlett periodograms; FFT periodograms; Welch periodograms; broadband EMI measurement system; digital signal processing; fast Fourier transform; measurement time reduction; time domain EMI measurement system; ultra-fast EMI measurement system; Antenna measurements; Computer errors; Electromagnetic interference; Error correction; Fast Fourier transforms; Frequency; Oscilloscopes; Performance evaluation; Signal processing; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2002 IEEE MTT-S International

Conference_Location

Seattle, WA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7239-5

Type

conf

DOI

10.1109/MWSYM.2002.1012318

Filename

1012318