Radiated emissions and immunity of microstrip transmission lines: theory and reverberation chamber measurements

Author

Hill, David A. ; Camell, Dennis G. ; Cavcey, Kenneth H. ; Koepke, Galen H.

Author_Institution

Div. of Electromagn. Fields, Nat. Inst. of Stand. & Technol., Boulder, CO, USA

Volume

38

Issue

2

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

165

Lastpage

172

Abstract

The increasing complexity of electronic systems has introduced an increased potential for electromagnetic interference (EMI) between electronic systems. We analyze the radiation from a microstrip transmission line and calculate the total radiated power by numerical integration. Reverberation chamber methods for measuring radiated emissions and immunity are reviewed and applied to three microstrip configurations. Measurements from 200 to 2000 MHz are compared with theory, and excellent agreement is obtained for two configurations that minimize feed cable and finite ground plane effects. Emissions measurements are found to be more accurate than immunity measurements because the impedance mismatch of the receiving antenna cancels when the ratio of the microstrip and reference radiated power measurements is taken. The use of two different receiving antenna locations for emissions measurements illustrates good field uniformity within the chamber

Keywords

UHF measurement; electric field measurement; electromagnetic interference; integration; magnetic field measurement; microstrip lines; receiving antennas; reverberation chambers; test facilities; waveguide theory; 200 to 2000 MHz; EMI; UHF; electromagnetic interference; electronic systems; feed cable effects minimisation; field uniformity; finite ground plane effects; impedance mismatch; microstrip transmission lines; numerical integration; radiated emissions measurement; radiated immunity measurement; receiving antenna; reference radiated power measurement; reverberation chamber measurements; total radiated power; Antenna measurements; Electromagnetic interference; Electromagnetic measurements; Impedance measurement; Microstrip; Power measurement; Power transmission lines; Transmission line measurements; Transmission line theory; Transmission lines;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.494619

Filename

494619