Connector receptacle with receptacle EMI shield

1. An electrical connector receptacle comprising:

a plurality of receptacle-side electrical contacts;

a socket into which a connector may be inserted, wherein when the connector is inserted into the socket, electrical contacts of the connector contact the plurality of receptacle-side contacts; and

a receptacle shield placed in the back of the receptacle, wherein the receptacle shield is composed of an Electro-Magnetic Interference barrier material, the receptacle shield having at least a first and a second EMI barrier opening, wherein when the connector is plugged into the socket, a first set of electrical connections is made through a first EMI barrier opening between a first set of the receptacle-side contacts and a first set of connector-side contacts, and a second set of electrical connections is made through a second EMI barrier opening between a second set of receptacle-side contacts and a second set of connector-side contacts.

2. The electrical connector receptacle of claim 1 , wherein when the connector is plugged into the socket, the receptacle shield is configured to make electrical contact with an EMI shield of the connector.

3. The electrical connector receptacle of claim 1 , wherein the receptacle shield includes a third EMI barrier opening, wherein when the connector is plugged into the socket, a third set of electrical connections is made through a third EMI barrier opening between a third set of the receptacle-side contacts and a third set of connect-side contacts.

4. The electrical connector receptacle of claim 1 , wherein the receptacle is an adaptor.

5. The electrical connector receptacle of claim 4 , wherein the receptacle is an XFP adaptor.

6. The electrical connector receptacle of claim 4 , wherein the receptacle is an SFP adaptor.

7. The electrical connector receptacle of claim 1 , further comprising:

a mechanism for mechanically connecting the receptacle to a host.

8. The electrical connector receptacle of claim 1 , wherein the first set of electrical connections comprise differential transmit signals, and the second set of electrical connections comprise differential receive signals.

9. The electrical connector receptacle of claim 1 , further comprising:

a receptacle side EMI barrier, which in conjunction with the receptacle shield services an EMI barrier between the host that contains the receptacle and the environment even when a connector is not plugged into the receptacle.

10. A system comprising:

a receptacle having an electrical interface, and a receptacle shield that is placed in the back of a socket of the receptacle, wherein the receptacle shield is composed of an Electro-Magnetic Interference barrier material, the receptacle shield having at least a first and a second EMI barrier opening; and

a connector having an electrical interface for plugging into the socket of the receptacle, wherein when the connector is plugged into the socket of receptacle, the receptacle shield electrically engages with an EMI shield of the connector, wherein when then EMI shield of the connector combines with the receptacle shield, the first and second EMI barrier openings are the largest EMI discontinuities of the combined shield.

11. The system of claim 10 , wherein the system further comprising:

a host system, wherein the receptacle is a first receptacle and is mechanically and electrically coupled to the host system; and

a plurality of other receptacles, at least some of which being structured the same as recited for the first receptacle.

12. The system of claim 10 , wherein the electrical connector comprises an optical cable extending from its back end.

13. The system of claim 10 , wherein the receptacle is an adaptor.

14. The system of claim 13 , wherein the receptacle is an XFP adaptor.

15. The system of claim 13 , wherein the receptacle is an SFP adaptor.