电磁兼容(EMC)系统设计问题|System Design for EMC Questions

pwm

System Design for EMC Questions

1. How do I model the effectiveness of shielded enclosures?
2. How important are the apertures in a shielded enclosure?
3. Can EMI be attenuated by using lossy thermal gaskets between the IC and the heatsink?

russell

My opinion are:
1. The cenclosures must be connected to ground but you have to make sure that your ground is clean enough, otherwise this is another patch antenna.
2. The aperture is not important but more ground connect points is better.
3. This depends on your gasket, if it contains carbon, it may have a little attenuation effect. Most of the materials do not have this effect.