Receptacle assembly for a midplane connector system

1. A receptacle assembly comprising:

a receptacle housing having a mating end; and

a contact module received in the housing, the contact module comprising a conductive holder and a frame assembly received in the conductive holder, the conductive holder providing electrical shielding for the frame assembly;

wherein the frame assembly comprises a first frame having at least two frame members, each frame member of the first frame supporting a differential pair of receptacle signal contacts, adjacent frame members of the first frame being separated by a gap;

wherein the frame assembly comprises a second frame having at least two frame members, each frame member of the second frame supporting a differential pair of receptacle signal contacts, adjacent frame members of the second frame being separated by a gap; and

wherein the first and second frames are internested such that at least one frame member of the first frame is received in a corresponding gap of the second frame and such that at least one frame member of the second frame is received in a corresponding gap of the first frame.

2. The receptacle assembly of claim 1 , wherein the first and second frames are internested such that the frame members of the first and second frames are co-planar.

3. The receptacle assembly of claim 1 , wherein the differential pairs of receptacle signal contacts of the first frame are interspersed with the differential pairs of receptacle signal contacts of the second frame in an alternating sequence.

4. The receptacle assembly of claim 1 , wherein the frame members of the first frame are overmolded over the differential pairs of receptacle signal contacts of the first frame separate from the frame members of the second frame, and wherein the frame members of the second frame are overmolded over the differential pairs of receptacle signal contacts of the second frame separate from the frame members of the first frame.

5. The receptacle assembly of claim 1 , wherein the first frame is fabricated separate from the second frame and mechanically coupled thereto.

6. The receptacle assembly of claim 1 , wherein each of the receptacle signal contacts of the first frame is part of a common leadframe and overmolded by a dielectric material that fauns the frame members, and wherein each of the receptacle signal contacts of the second frame is part of a common leadframe separate from the leadframe of the first frame and overmolded by a dielectric material that forms the frame members of the second frame.

7. The receptacle assembly of claim 1 , wherein the gap between frame members of the first frame is wider than a width of the frame member of the second frame such that windows are defined between the frame member of the second frame and the two frame members of the first frame flanking such frame member of the second frame, tabs of the conductive holder being received in the windows.

8. The receptacle assembly of claim 1 , wherein the frame members of the first frame are connected by a bridge spanning the corresponding gap, the bridge engaging the second frame, and wherein the frame members of the second frame are connected by a bridge spanning the corresponding gap, the bridge of the second frame engaging the first frame.

9. The receptacle assembly of claim 1 , wherein the receptacle signal contacts have mating portions extending from the corresponding frame members for electrical termination to corresponding header signal contacts, the mating portions being twin beams configured to receive the header signal contact between the twin beams of the mating portions.

10. The receptacle assembly of claim 1 , wherein the receptacle signal contacts have mating portions extending from corresponding frame members for electrical termination to corresponding header signal contacts, the mating portions each having a primary beam and a secondary beam, the secondary beam being folded over to oppose the primary beam, wherein the secondary beams of the receptacle signal contacts of each differential pair are folded over in respective opposite directions.

11. A receptacle assembly comprising:

a receptacle housing; and

a plurality of contact modules received side-by-side in a stacked configuration in the housing, each contact module comprising a conductive holder and a frame assembly received in the conductive holder, the conductive holder providing electrical shielding for the frame assembly;

wherein the frame assembly comprises a first frame having at least two frame members, each frame member of the first frame supporting a differential pair of receptacle signal contacts, adjacent frame members of the first frame being separated by a gap, the frame members of the first frame having a bridge spanning the gap and connected between the corresponding frame members, the bridge of the first frame having a first coupling member;

wherein the frame assembly comprises a second frame having at least two frame members, adjacent frame members of the second frame supporting a differential pair of receptacle signal contacts, each frame member of the second frame being separated by a gap, the frame members of the second frame having a bridge spanning the gap and connected between the corresponding frame members, the bridge of the second frame having a second coupling member;

wherein the first and second frames are internested such that at least one frame member of the first frame is received in a corresponding gap of the second frame and such that at least one frame member of the second frame is received in a corresponding gap of the first frame; and

wherein the first and second frames are internested such that the bridge of the first frame engages a corresponding frame member of the second frame with the first coupling member connected to the second frame and such that the bridge of the second frame engages a corresponding frame member of the first frame with the second coupling member connected to the first frame.

12. The receptacle assembly of claim 11 , wherein the first and second coupling members comprise openings, the first frame having a frame coupling member received in the opening defining the second coupling member, the second frame having a frame coupling member received in the opening defining the first coupling member.

13. The receptacle assembly of claim 11 , wherein the first frame includes a trough extending across the frame member of the first frame received in the gap of the second frame, the bridge of the second frame being snuggly received in the trough.

14. The receptacle assembly of claim 11 , wherein the first and second frames are interested such that the frame members of the first and second frames are co-planar.

15. The receptacle assembly of claim 11 , wherein the first frame is fabricated separate from the second frame and mechanically coupled thereto.

16. A receptacle assembly comprising:

a receptacle housing; and

a plurality of contact modules received side-by-side in a stacked configuration in the housing, each contact module comprising a conductive holder and a frame assembly received in the conductive holder, the conductive holder having internal tabs extending through the frame assembly, the conductive holder providing electrical shielding for the frame assembly;

wherein the frame assembly comprises a first frame having at least two frame members, each frame member of the first frame supporting a differential pair of receptacle signal contacts, each frame member of the first frame being separated by a gap;

wherein the frame assembly comprises a second frame having at least two frame members, each frame member of the second frame supporting a differential pair of receptacle signal contacts, each frame member of the second frame being separated by a gap;

wherein the first and second frames are internested such that at least one frame member of the first frame is received in a corresponding gap of the second frame between frame members of the second frame and such that at least one frame member of the second frame is received in a corresponding gap of the first frame between frame members of the first frame; and

wherein the first and second frames are interested such that windows are defined in the gaps between the internested frame members of the first and second frames, the tabs of the conductive holder extending into corresponding windows to provide electrical shielding between the frame members on opposite sides of the tabs.

17. The receptacle assembly of claim 16 , wherein shielded channels are defined between the tabs, the frame members being received and corresponding shielded channels.

18. The receptacle assembly of claim 16 , wherein shielded channels are defined between the tabs, each shielded channel receiving a corresponding differential pair of receptacle signal contacts.

19. The receptacle assembly of claim 16 , wherein the first and second frames are internested such that the frame members of the first and second frames are co-planar.

20. The receptacle assembly of claim 16 , wherein the first frame is fabricated separate from the second frame and mechanically coupled thereto.