Method and system for providing electromagnetic interference (emi) shielding in an optical communications module
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsLaurence R. McColloch, Sanjeev Gupta
Life of this patent
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Abstract
An optical communications module is provided with an EMI shielding system that comprises a resistive coating disposed on one or more inner surfaces of the module housing. The resistive coating has a thickness that is greater than or equal to one skin depth and has a resistivity that is low enough to support electrical current flow, but high enough to absorb EMI radiation of a particular wavelength or wavelength range. The combination of these features causes EMI radiation to propagate in the resistive coating due to skin effect. The resistive coating absorbs at least a portion of the EMI radiation propagating therein.
Claims20
An optical communications module comprising:
- an optical communications module housing;
- and
- a resistive coating disposed on at least one inner surface of the housing, the resistive coating having a thickness that is equal to or greater than one skin depth, the resistive coating having a resistivity that ranges from about 10 ohm-meter to about 400 ohm-meter, and wherein the resistive coating absorbs at least a portion of electromagnetic interference (EMI) radiation produced by at least one source of EMI disposed on or in the optical communications module.
A method for providing electromagnetic interference (EMI) shielding, the method comprising:
- providing a optical communications module housing;
- and
- disposing a resistive coating on at least one inner surface of the housing, the resistive coating having a thickness that is equal to or greater than one skin depth, the resistive coating having a resistivity that ranges from about 10 ohm-meter to about 400 ohm-meter, and wherein the resistive coating absorbs at least a portion of electromagnetic interference (EMI) radiation produced by at least one source of EMI disposed on or in the optical communications module.
Dependencies are inferred from the claim text.