1. Field of the Invention
The present invention relates to an electrical connector, especially to a high-frequency electrical connector.
2. Description of Related Art
US Pat. No. US2009/0221165 discloses a high-frequency connector up to 6 Gbps, which comprises a housing loading a plurality of electrical contacts. The electrical contacts include a plurality of signal contacts and a plurality of ground contacts. A shieldless ground coupling assembly places at least a portion of the ground contacts in electrical communication with each other. The only one ground bar fails to meet a high-frequency performance up to 12 Gbps.
Hence, an electrical connector of a high-frequency performance is desired.
Accordingly, an object of the present invention is to provide an electrical connector with a high-frequency performance.
To achieve the above object, an electrical connector comprises an insulating housing and a plurality of contacts. The contacts include a plurality of signal contacts arranged in differential signal pairs and a plurality of ground contacts. Every two adjacent differential signal pairs is separated by a ground contact. A first ground bar connects each ground contact to form a first electrical connection. A second ground bar connects each ground contact to form a second electrical connection. The first ground bar is electrically connected to the second ground bar through at least a bridge.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
Reference will now be made to the drawing figures to describe the preferred embodiment of the present invention in details.
Referring to
Each of the first and third groups 20a, 20c of contacts includes two pairs of differential signal pair 241 and three individual ground contacts 242 separating two pairs of the signal pair. Combination with
The first ground bar 25 is electrically connected to the second ground bar 26 via two bridges 24 so as to form a closed circuit. The closed circuit can decrease voltage distribution among the elastic arms or among ground contacts. The crosstalk between the differential pairs will be reduced because of little voltage distribution. The two bridges are parallel to each other. One bridge is also acceptable and the high-frequency performance may be little worse than two bridges. Please mention that the bridges won't align with the third group 20c of contacts from a top-to-bottom view for little pitch between adjacent contacts.
A spacer 27 is provided to used to retain the soldering portions of the first series of contacts 20a. The retaining elements 28 are attached to a PCB after being assembled to the insulating housing 10.
The second electrical connector 200 comprises insulating housing 30, contacts 40 assembled on the insulating housing. A first ground bar 50 includes several elastic arms connecting retaining portions of the ground contacts of a group of contacts 40c. A second ground bar 60 includes several plate-shaped bridges 61 connecting the first ground bar 50. When the first electrical connector 100 mates with the electrical second connector 200, the contacting portions 41c of the second electrical connector will be deformed by the contacting portions 21c of the first electrical connector and touch the bridges 61. It is noted that the housing 30 is composed of two opposite side walls sandwiching the mating slot 31 therebetween wherein one of the side walls defines a cutout without the contacts 40 therein while the other of the side walls has the contact 40 located only vertically in alignment with the cutout. In addition, the side wall having the cutout defines an outwardly protruding region on an exterior surface in alignment with the cutout along the vertical direction while the side wall without said cutout defines an even exterior surface thereof.
While preferred embodiments in accordance with the present invention has been shown and described, equivalent modifications and changes known to persons skilled in the art according to the spirit of the present invention are considered within the scope of the present invention as defined in the appended claims.
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