Hey,
I have just been out performing EMC/EMI tests on our systems and found out that one PCA (printed circuits assembly, that's what it is called? a mounted PCB?) in the system is very susceptible to radiation and also radiates a lot. In the previous version of this circuit, the ground plane seems to have been spread on the top and bottom layer if I understand correct. However in the new version, our supplier seems to have dropped this idea and have not covered the first or last layer in a ground plane. Only a small part of the top layer seems to be connected to ground.
My boss claims this could be the reason for the bad EMC/EMI results. I have absolutely no experience whatsoever from layout of PCBs and don't really know how that ground plane can affect the results and why you spread the gnd connection that much (except to decrease resistivity and thus make all nodes have "the same" ground potential).
Does anybody care to enlighten me?
I have just taken my master degree in computer engineering and is currently working with electronics, which I am very interested in. I just feel I lack the knowledge
I have just been out performing EMC/EMI tests on our systems and found out that one PCA (printed circuits assembly, that's what it is called? a mounted PCB?) in the system is very susceptible to radiation and also radiates a lot. In the previous version of this circuit, the ground plane seems to have been spread on the top and bottom layer if I understand correct. However in the new version, our supplier seems to have dropped this idea and have not covered the first or last layer in a ground plane. Only a small part of the top layer seems to be connected to ground.
My boss claims this could be the reason for the bad EMC/EMI results. I have absolutely no experience whatsoever from layout of PCBs and don't really know how that ground plane can affect the results and why you spread the gnd connection that much (except to decrease resistivity and thus make all nodes have "the same" ground potential).
Does anybody care to enlighten me?
I have just taken my master degree in computer engineering and is currently working with electronics, which I am very interested in. I just feel I lack the knowledge