Radio frequency shield for electronic equipment

• US 6,949,706 B2
• Filed: 05/23/2002
• Issued: 09/27/2005
• Est. Priority Date: 09/28/2001
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens Information And Communication Mobile LLC (Siemens AG)
• Inventors: West, David Owen
• Primary Examiner(s): Reichard, Dean A.
• Assistant Examiner(s): OLIVA, CARMELO B
• Application Number:
  US10/154,750
• Publication Number:
  US 20030062179A1
• Time in Patent Office: 1,223 Days
• Field of Search: 174/35.R, 174/35.GC, 361/752, 361/753, 361/800, 361/801, 361/816, 361/818, 220/4.02
• US Class Current: 174/384
• CPC Class Codes: H05K 9/0032 having multiple parts, e.g. frames mating with lids

Abstract

A device for providing radio frequency shielding is disclosed. The device includes a frame and cover removably attached to the frame. The frame is configured to extend generally around the periphery of an electronic component. The frame has an upper wall, sidewalls depending therefrom, and a plurality of stiffening flanges extending from the upper wall towards an interior portion of the frame. The cover has an upper surface and a plurality of members extending therefrom for engagement with the sidewalls of the frame. The cover and the frame form an enclosure for radio frequency shielding the electronic component.

Claims

1. A device for providing radio frequency shielding, comprising:

a frame configured to extend generally around the periphery of an electronic component, the frame comprising an upper wall, sidewalls depending from the upper wall and away from a central opening of the frame at an angle of at least approximately ninety-one degrees relative to the upper wall, and a plurality of stiffening flanges extending from the upper wall towards an interior portion of the frame; and

a cover removably attached to the frame, the cover comprising an upper surface and a plurality of members extending therefrom for engagement with the sidewalls of the frame, whereby the cover and the frame form an enclosure for shielding the electronic component.

2. The device of claim 1 wherein the members are spaced to substantially prevent electromagnetic radio frequency energy from entering and leaving said enclosure between said members.

3. The device of claim 1 wherein the frame is formed from stamped metal.

4. The device of claim 1 wherein the frame is rectangular and at least one of the plurality of stiffening flanges are disposed along an edge of the frame.

5. The device of claim 4 wherein the stiffening flanges are disposed at a central portion of each edge of the frame.

6. The device of claim 4 wherein one of the stiffening flanges is disposed at a corner of the frame.

7. The device of claim 1 wherein the upper surface of the cover has a plurality of openings disposed to allow for inspection of the electronic component when the component is positioned within the device.

8. The device of claim 7 wherein said plurality of openings are generally round and have a diameter of a size to substantially prevent electromagnetic radio frequency energy from entering or leaving said openings.

9. The device of claim 1 wherein the stiffening flanges taper downwardly away from the upper wall.

10. The device of claim 1 wherein said plurality of members comprises spring members biased inwardly for engagement with the sidewalls of the frame.

11. The device of claim 10 wherein said plurality of members further comprises alignment members having a projection configured for insertion into an opening in the sidewall of the frame.

12. The device of claim 1 wherein said plurality of members terminate before reaching a lower edge of the frame sidewall when the cover is attached to the frame.

13. The device of claim 1, wherein:

the cover further comprises a plurality of alignment members located at corners of the cover;

and whereby the cover and the frame have at least two grounding contact points at each of the corner interfaces between the frame and the cover.

14. A device for providing radio frequency shielding, comprising:

a frame configured to extend generally around the periphery of an electronic component, the frame comprising an upper wall, sidewalls depending therefrom, and a plurality of stiffening flanges extending from the upper wall towards an interior portion of the frame, the stiffening flanges extending downwardly from the upper wall at an angle less than 20 degrees relative to the upper wall; and

a cover removably attached to the frame, the cover comprising an upper surface and a plurality of members extending therefrom for engagement with the sidewalls of the frame, whereby the cover and the frame form an enclosure for shielding the electronic component.

15. The device of claim 14 wherein the stiffening flanges extend downwardly from the upper wall at an angle of approximately 15 degrees relative to the upper wall.

16. The device of claim 14 wherein the members are spaced to substantially prevent electromagnetic radio frequency energy from entering and leaving said enclosure between said members.

17. The device of claim 14 wherein the frame is rectangular and at least one of the plurality of stiffening flanges are disposed along an edge of the frame.

18. The device of claim 17 wherein the stiffening flanges are disposed at a central portion of each edge of the frame.

19. The device of claim 14 whereby the cover and the frame form an enclosure for shielding the electronic component and have at least two grounding contact points at each of the corner interfaces between the frame and the cover.

20. The device of claim 19 wherein at least one of the sidewalls has a tab at an end portion thereof and at least one of said plurality of alignment members has an opening sized for receiving the tab, wherein the tab and the opening form one of the grounding contact points.

21. The device of claim 19 wherein one of the cover alignment member and frame sidewall has an alignment-receiving element and the other of the alignment member and the frame sidewall has a projection sized for insertion into the alignment-receiving element, the projection and the alignment receiving element forming one of the grounding contact points.

22. The device of claim 21 wherein the alignment member comprises the projection and the frame sidewall comprises the alignment-receiving element.

23. The device of claim 22 wherein the alignment-receiving element is an opening extending through the frame sidewall.

24. The device of claim 23 wherein said opening and the projection have a semi-circle shape.

25. The device of claim 14 whereby the cover and the frame form an enclosure for shielding the electronic component and have at least three grounding contact points at each of the corner interfaces between the frame and the cover.

26. The device of claim 14 wherein the sidewalls depend from the upper wall away from a central opening of the frame at an angle of at least approximately ninety-one degrees relative to the upper wall.