Receptacle cage, receptacle assembly, and transceiver module assembly

Abstract

In a receptacle cage, a front EMI fingers in a tubular shape serving as a first shield member is provided on the entire periphery of a substantially rectangular module slot. In addition, a gap between outer peripheral surfaces of an upper case as well as a lower plate of an optical module connected to a receptacle connector in a receptacle connector accommodating portion and an inner surface of the cage is shielded by a top EMI fingers serving as a second shield member and side EMI fingers serving as third shield members. Moreover, the lower plate comes into contact with a bottom wall portion which is grounded.

Description

CROSS-REFERENCES TO THE RELATED APPLICATIONS[0001]This application is a continuation of application Ser. No. 13 / 585,422 filed on Aug. 27, 2012, which claims the benefit of Japanese Patent Application. No. 2011-188604 filed Aug. 31, 2011. The disclosures of the prior applications are hereby incorporated by reference herein in their entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a receptacle cage, a receptacle assembly, and a transceiver module assembly.[0004]2. Description of the Related Art[0005]In an optical communication system, a transceiver module has been put into practical use in order to transmit an optical signal transmitted through an optical connector and the like to a mother board. As disclosed in Japanese Patent Laid-Open No. 2005-520296, for example, such a transceiver module is located on a chassis which constitutes a communication system. The transceiver module comprises the following constituents as main elem...

AI Technical Summary

Benefits of technology

The present invention provides a solution for reducing noise in a receptacle cage and a transceiver module assembly. The invention includes three shield members made of metal that come into contact with the optical module and the connector accommodating portion to shield the electromagnetic noise generated during operation. This ensures that the optical module receives reliable protection against noise radiation. Overall, the invention provides a reliable way to suppress noise radiation from the inside to the outside of the optical module receptacle.

Problems solved by technology

In the above-described countermeasure for the radio wave interference, unnecessary radiation of noise from the inside of the transceiver module located in the chassis to the inside of the chassis is harmful to other electronic components on the circuit board as well.

Accordingly, it is not easy to tightly seal the gap between the outer peripheral portion of the optical module and the inner peripheral portion of the optical module receptacle.

In short, the above-described configuration proposed in Japanese Patent Laid-Open No. 2005-520296 is likely to cause noise radiation through the gap and is therefore insufficient in light of the countermeasure for the radio wave interference.

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