Electromagnetic radiation shielding on a pci express card

Abstract

An example embodiment includes an electromagnetic radiation (EMR) shield. The EMR shield is configured to reduce EMR from escaping a host device. The EMR shield includes a structure, two or more module-grounding tabs, and multiple fingers. The structure is configured to substantially surround two or more adjacent transceiver modules positioned in an opening defined in a bezel. The two or more module-grounding tabs extend from the structure. Each of the module-grounding tabs is configured to contact one of the transceiver modules. The fingers extend from the structure and are configured to contact the bezel at multiple contact areas substantially surrounding the opening.

What is claimed is: 
     
         1 . An electromagnetic radiation (EMR) shield configured to reduce EMR from escaping a host device, the EMR shield comprising:
 a structure configured to substantially surround two or more adjacent transceiver modules positioned in an opening defined in a bezel;   two or more module-grounding tabs extending from the structure and each configured to contact one of the transceiver modules; and   a plurality of fingers extending from the structure and configured to contact the bezel at a plurality of contact areas substantially surrounding the opening.   
     
     
         2 . The EMR shield of  claim 1 , wherein the structure comprises an upper wall configured to be positioned parallel to a top surface of the transceiver modules, a lower wall configured to be positioned parallel to a bottom surface of the transceiver modules, and two side walls configured to be positioned parallel to side surfaces of the transceiver modules. 
     
     
         3 . The EMR shield of  claim 2 , wherein the structure further comprises a rear wall configured to be positioned parallel to a rear surface of the transceiver module. 
     
     
         4 . The EMR shield of  claim 3 , wherein the structure comprises an outer edge opposite the rear wall and defined along the upper wall, the lower wall, and the two side walls, and the fingers extend from the outer edge. 
     
     
         5 . The EMR shield of  claim 4 , wherein each finger that extends from a portion of the outer edge defined along the upper wall and the two side walls is curved. 
     
     
         6 . The EMR shield of  claim 5 , wherein each finger that extends from a portion of the outer edge defined along the lower wall is substantially straight. 
     
     
         7 . The EMR shield of  claim 6 , wherein the rear wall comprises one or more connectors configured to be coupled to a printed circuit board (PCB) and the lower wall comprises one or more connectors configured to be coupled to the PCB. 
     
     
         8 . The EMR shield of  claim 1 , wherein the structure comprises a first portion configured to be positioned inside the opening and a second portion configured to be positioned outside the opening, the first portion and the second portion being connected by the fingers, each finger configured to contact an edge of the opening. 
     
     
         9 . The EMR shield of  claim 1 , wherein the structure further comprises one or more vertical slats each configured to be positioned between adjacent transceiver modules of the transceiver modules. 
     
     
         10 . A peripheral component interconnect express (PCIe) card comprising the EMR shield of  claim 1 . 
     
     
         11 . A peripheral component interconnect express (PCIe) card comprising:
 a bezel defining an opening;   two or more adjacent transceiver modules positioned in the opening;   a printed circuit board (PCB) mechanically coupled to the bezel and to the transceiver modules; and   an electromagnetic radiation (EMR) shield configured to reduce EMR that escapes through the opening from a host device into which the PCIe card is received, the EMR shield including a structure defining an enclosure configured to at least partially enclose the transceiver modules, the EMR shield further including a plurality of fingers extending from the structure and configured to contact the bezel at a plurality of contact areas substantially surrounding the opening.   
     
     
         12 . The PCIe card of  claim 11 , wherein:
 the structure comprises an upper piece configured to at least partially enclose a top surface of the transceiver modules, a rear surface of the transceiver modules, and two side surfaces of the transceiver modules;   the upper piece includes an outer edge; and   each of the fingers that extends from the outer edge of the upper piece is curved.   
     
     
         13 . The PCIe card of  claim 12 , wherein the upper piece comprises one or more upper piece connectors configured to be coupled to the PCB. 
     
     
         14 . The PCIe card of  claim 12 , wherein:
 the structure comprises a lower piece positioned between the transceiver modules and the PCB;   the lower piece including an outer edge;   each of the fingers that extends from the outer edge of the lower piece is substantially straight.   
     
     
         15 . The PCIe card of  claim 12 , wherein:
 the structure comprises a lower piece positioned between the transceiver modules and the PCB;   the lower piece including an outer edge;   each of the fingers that extends from the outer edge of the lower piece is curved.   
     
     
         16 . The PCIe card of  claim 11 , wherein the plurality of fingers is substantially evenly spaced around the opening. 
     
     
         17 . The PCIe card of  claim 11 , wherein the structure substantially surrounds the transceiver modules. 
     
     
         18 . A peripheral component interconnect express (PCIe) card comprising:
 a bezel defining an opening;   two or more adjacent transceiver modules positioned in the opening;   a printed circuit board (PCB) mechanically coupled to the bezel and to the transceiver module; and   an electromagnetic radiation (EMR) shield configured to reduce EMR that escapes through the opening from a host device into which the PCIe card is received, the EMR shield including a structure substantially surrounding the transceiver modules, the EMR shield further including a plurality of ridges defined in the structure, the plurality of ridges configured to contact the bezel at a plurality of contact areas substantially surrounding the opening.   
     
     
         19 . The PCIe card of  claim 18 , wherein:
 the structure comprises a front wall defining two or more module openings in each of which one of the transceiver modules is positioned, an upper wall, a lower wall, and two side walls;   the upper wall, the lower wall, and the two side walls are substantially perpendicular to the front wall;   each of the upper wall, the lower wall, and the two side walls includes two or more of the ridges; and   each ridge includes a raised portion configured to contact an edge of the opening.   
     
     
         20 . The PCI card of  claim 18 , wherein the ridges are substantially evenly spaced around the opening.