Abstract: A printed circuit board having a dielectric layer is disclosed. At least one signal trace is disposed adjacent a first surface of the dielectric layer in a first signal area. A reference plane is disposed adjacent a second surface of the dielectric layer in a first reference area positioned opposite the first signal area. The reference plane is configured to carry a reference potential for signals on the signal trace. At least one other signal trace is disposed adjacent the second surface of the dielectric layer in a second signal area and coupled to the signal trace in said first signal area. A second reference plane is disposed adjacent the first surface of the first dielectric layer in a second reference area positioned opposite the second signal area. The second reference plane is configured to carry the reference potential for signals on the other signal trace.

Abstract: An apparatus is provided for reducing or eliminating a gap defined between adjacent components of an electronic system, thereby reducing electromagnetic interference generated by the electronic system. The apparatus includes a cam having a cam surface positionable adjacent a component of the electronic system. The cam is moveable to an actuated position in which the cam surface applies a force to the component. The apparatus further includes a support mountable to the electronic system. The support engages the cam and facilitates the movement of the cam. The movement of the cam with respect to the support and into the actuated position causes the cam surface to apply the force to the component, thereby reducing or eliminating a gap between the component and an adjacent component of the electronic system.