20-H rule modeling and measurements

Author

Shim, Hwan W. ; Hubing, Todd H.

Author_Institution

Dept. of Electr. & Comput. Eng., Missouri Univ., Columbia, MO, USA

Volume

2

fYear

2001

fDate

2001

Firstpage

939

Abstract

The 20-H rule is a printed circuit board layout guideline. On boards with power and ground planes, the fringing field at the edges of the board is contained by backing the edge of the power plane away from the edge of the board by a distance equal to 20 times the separation distance between the planes. In this study, test boards were built and measured with and without implementing the 20-H rule. The measured results are compared to numerical models. The results of this study show that, although the near fields are more contained, the radiation from a board implementing the 20-H rule is actually slightly higher than the radiation from boards with a traditional design

Keywords

electromagnetic compatibility; electromagnetic interference; printed circuit layout; printed circuit testing; 20-H rule; EM radiation; EMC; EMI; fringing field; ground planes; numerical models; planes separation distance; power planes; printed circuit board layout guideline; test boards; Dielectrics; Geometry; Guidelines; Magnetic fields; Near-field radiation pattern; Numerical models; Patch antennas; Printed circuits; Resonant frequency; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2001. EMC. 2001 IEEE International Symposium on

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-6569-0

Type

conf

DOI

10.1109/ISEMC.2001.950514

Filename

950514