Title :
Cavity Model for the Slot Radiation of an Enclosure Excited by Printed Circuit Board Traces With Different Loads
Author :
Poschalko, Christian ; Selberherr, Siegfried
Author_Institution :
Diesel & Gasoline Syst., Robert Bosch AG, Vienna
Abstract :
Traces on a printed circuit board (PCB) couple to the cavity consisting of the PCB ground plane and a metallic enclosure cover. We introduce this common-mode coupling of a PCB trace to the cavity field by an analytical model that is verified with 3-D simulations using HFSS. The cavity field causes radiated emission from the slots of the cavity. For an accurate calculation of the cavity field inside the enclosure and the radiated emission, we consider the radiation loss by a multiport approach. Comparisons of the analytical results for the radiated field to measurements show good agreement. Radiated emission can be calculated for arbitrary geometric enclosure shapes as a function of frequency, position of the trace on the PCB, and trace load/driver impedances.
Keywords :
electromagnetic waves; printed circuits; 3-D simulations; HFSS; PCB ground plane; arbitrary geometric enclosure shapes; cavity model; enclosure slot radiation; metallic enclosure cover; multiport approach; printed circuit board traces; radiated emission; radiation loss; this common-mode coupling; trace load-driver impedances; Analytical models; Circuit simulation; Coupling circuits; Driver circuits; Electromagnetic coupling; Frequency; Impedance; Printed circuits; Shape; Voltage; Cavity model; common-mode coupling; electrically equipped enclosures; radiated emission;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
DOI :
10.1109/TEMC.2008.2008815
