The noise-tee - a lightwave device for microwave noise measurements

Author

Van den Brink, Rob F M

Author_Institution

KPN-Res., Leidschendam, Netherlands

Volume

44

Issue

3

fYear

1996

fDate

3/1/1996 12:00:00 AM

Firstpage

490

Lastpage

492

Abstract

An innovative lightwave method is proposed to insert noise in electronic circuits in favor of microwave noise measurements. The proposed noise-tee has attractive additional features compared to the use of 50 Ω noise sources: 1) the inserted noise level and noise bandwidth is continuously variable over a wide dynamic range; 2) the wideband scaling accuracy of this level, relative to a pre-calibrated level, equals the accuracy of simple DC-current measurements; 3) level-induced impedance variations are negligible, compared to the 20% impedance variation of a commonly used microwave noise source; and 4) noise-tees enable the realization of 100% reflective noise sources, in favor of two-port noise-parameter measurements

Keywords

electric noise measurement; microwave measurement; noise generators; p-i-n photodiodes; test equipment; lightwave device; microwave noise measurements; noise-tee; reflective noise sources; two-port noise-parameter measurements; Bandwidth; Circuit noise; Dynamic range; Electronic circuits; Impedance measurement; Microwave devices; Microwave measurements; Microwave theory and techniques; Noise level; Noise measurement;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.486167

Filename

486167