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Telescoping Shielding for Inter-Enclosure Connections

IP.com Disclosure Number: IPCOM000200727D
Publication Date: 2010-Oct-26
Document File: 4 page(s) / 569K

Publishing Venue

The IP.com Prior Art Database

Abstract

Described is telescoping shielding for inter-enclosure connections.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 21% of the total text.

Page 01 of 4

With a shielding boundary at two drawer enclosure surfaces, any electrical copper connection would need to break the boundary to make a connection with a connector in the adjacent drawer. This interconnection between rack drawers risks breaking the shielding integrity of either drawer, causing electromagnetic emissions to escape. A method of remotely engaging the shield between the drawers is discussed. A remotely activated connector rises by actuation through a telescoping flexible shield. First, a gasketted shield connection is made to the inside surface of the first enclosure then followed by a gasket contact to the outer surface of the second enclosure. This completes the shielding boundary between the two enclosures and maintains integrity to shield electromagnetic emissions.

    A design situation exists whereby processor bus lines are essentially brought outside the enclosure to make connections to another drawer. Although additional hardening was introduced to the cables (SMP), the shielding required to protect the internal bus lines from interference proved to be so thick as to not allow the cables to be flexible enough for installation. The optimum condition is not to let the internal sensitive signalling exit the enclosure due to the fact that the signals cannot be adequately protected from the environment. This condition has been demonstrated to be an EMI as well as ESD concern in the design of products.

    Shown below in Figure 1 is the current SMP signalling cabling that has shown to be a concern on the present server configuration.

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    A better design may be implemented whereby the sensitive signals are kept within both enclosures and a shielded bonding tunnel is formed between the two drawers by a telescoping shielded flexible fabric. The key feature is that of a connector that rises up to contact the invention and makes contact along its edge for additional 360 degree bonding. The connector

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Page 02 of 4

then continues through the first enclosure and then second enclosure with the flex shielding making contact with the first and then second enclosure inside and outside enclosures, respectively. Figures 2 and 3 show two rack drawers with the distance between them (exaggerated). The invention is shown making a drawer-to-drawer connection.

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