Title :
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
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;
Conference_Titel :
Electromagnetic Compatibility, 2001. EMC. 2001 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-6569-0
DOI :
10.1109/ISEMC.2001.950514
