Very high speed, high density electrical interconnection system with broadside subassemblies
A modular electrical connector with broad-side coupled signal conductors in a right angle intermediate portion. Broadside coupling provides balanced pairs for very high frequency operation. The connector is assembled with multiple subassemblies, each of which has multiple pairs of signal conductors. The subassemblies are formed from an insulative portion having grooves in opposite sides into which the intermediate portions of signal conductors. Covers, holding the signal conductors in the grooves, establish the position of the signal conductors relative to reference conductors at the exterior of subassembly, so as to provide a controlled impedance. Lossy material is positioned between the pairs in a subassembly and/or contacts the reference conductors of the subassemblies, and the lossy material of the subassemblies is in turn connected with a conductive structure.
1. An electrical connector, comprising:
a plurality of subassemblies arranged side-by-side, each subassembly of the plurality comprising:
a plurality of pairs of signal conductors, each pair comprising a first signal conductor and a second signal conductor, each of the first signal conductor and the second signal conductor comprising:
a first end portion and a second end portion;
a contact tail formed at the first end portion;
a mating contact portion formed at the second end portion; and
an intermediate portion joining the first end portion and the second end portion, wherein at least the intermediate portion comprises broadsides and edges; and
an integral insulative portion comprising a first side and a second side separated from the first side in a first direction, wherein:
the first side comprises a plurality of first grooves;
the second side comprises a plurality of second grooves;
an intermediate portion of a first signal conductor of each pair of the plurality of pairs of signal conductors is inserted into a first groove;
an intermediate portion of a second signal conductor of each pair of the plurality of pairs of signal conductors is inserted into a second groove; and
the plurality of first grooves are aligned in the first direction with respective second grooves such that at least the intermediate portions of the plurality of pairs are broadside coupled.
2. The electrical connector of claim 1 , wherein the electrical connector is a right angle connector.
3. The electrical connector of claim 1 , wherein each of the plurality of subassemblies further comprises lossy material between the intermediate portions of adjacent pairs of signal conductors.
4. The electrical connector of claim 3 , wherein the lossy material has a conductivity between 1 Siemen/meter and 10,000 Siemen/meter.
5. The electrical connector of claim 3 , wherein the lossy material between the intermediate portions of adjacent pairs of signal conductors bends to conform to bends in the intermediate portions of the adjacent pairs of signal conductors.
6. The electrical connector of claim 1 , wherein each of the plurality of subassemblies further comprises covers pressing the first signal conductors and the second signal conductors into the first and second grooves, respectively.
7. The electrical connector of claim 6 , wherein each of the plurality of subassemblies further comprises conductive members, outside the covers, configured for shielding the plurality of pairs.
8. The electrical connector of claim 1 , wherein each of the plurality of pairs of signal conductors for each of the plurality of subassemblies comprises a transition from broadside coupled to edge coupled adjacent at least the first end portion or the second end portion of the signal conductors of the pair.
9. The electrical connector of claim 1 , wherein each of the plurality of subassemblies further comprises lossy material between signal conductors in a pair.
10. The electrical connector of claim 1 , wherein the lossy material extends in a plane perpendicular to the broadsides of the signal conductors in the pair.
11. The electrical connector of claim 1 , wherein, for each of the plurality of subassemblies, the insulative portion comprises a unitary structure comprising a plurality of first grooves and second grooves.
12. The electrical connector of claim 1 , wherein, for each of the plurality of subassemblies, the insulative portion comprises a plurality of modules, each comprising a single pair of a first grooves and a second groove.
13. An electrical connector of claim 1 , comprising:
a plurality of subassemblies arranged side-by-side, each subassembly of the plurality comprising:
a plurality of pairs of signal conductors, each pair comprising a first signal conductor and a second signal conductor, each of the first signal conductor and the second signal conductor comprising:
a first end portion and a second end portion;
a contact tail formed at the first end portion;
a mating contact portion formed at the second end portion; and
an intermediate portion joining the first end portion and the second end portion, wherein at least the intermediate portion comprises broadsides and edges; and
an insulative portion comprising a first side and a second side separated from the first side in a first direction, wherein:
the first side comprises a plurality of first grooves;
the second side comprises a plurality of second grooves;
an intermediate portion of a first signal conductor of each pair of the plurality of pairs of signal conductors is inserted into a first groove;
an intermediate portion of a second signal conductor of each pair of the plurality of pairs of signal conductors is inserted into a second groove;
the plurality of first grooves are aligned in the first direction with respective second grooves such that at least the intermediate portions of the plurality of pairs are broadside coupled; and
the insulative portion comprises a plurality of openings separated by walls, and the mating contact portions of the signal conductors of the plurality of pairs are inserted in the openings.
14. An electrical connector, comprising:
a plurality of subassemblies arranged side-by-side, each subassembly of the plurality comprising:
a plurality of pairs of signal conductors, each pair comprising a first signal conductor and a second signal conductor, each of the first signal conductor and the second signal conductor comprising:
a first end portion and a second end portion;
a contact tail formed at the first end portion;
a mating contact portion formed at the second end portion; and
an intermediate portion joining the first end portion and the second end portion, wherein at least the intermediate portion comprises broadsides and edges;
an insulative portion comprising a first side and a second side separated from the first side in a first direction; and
reference conductors on the first side and the second side, wherein:
the first side comprises a plurality of first grooves;
the second side comprises a plurality of second grooves;
an intermediate portion of a first signal conductor of each pair of the plurality of pairs of signal conductors is inserted into a first groove;
an intermediate portion of a second signal conductor of each pair of the plurality of pairs of signal conductors is inserted into a second groove; and
the plurality of first grooves are aligned in the first direction with respective second grooves such that at least the intermediate portions of the plurality of pairs are broadside coupled.
15. The electrical connector of claim 14 , further comprising lossy material coupled to the reference conductors on the first side and the second side.
16. The electrical connector of claim 15 , further comprising a conductive member connecting the lossy material of the plurality of subassemblies.
17. A method of manufacturing an electrical connector, the method comprising:
forming a plurality of insulative portions, each insulative portion of the plurality of insulative portions comprising a first side and a second side separated from the first side in a first direction with a plurality of first grooves on the first side and a plurality of second grooves on the second side;
forming a plurality of signal conductors, each signal conductor of the plurality comprising:
a first end portion and a second end portion;
a contact tail formed at the first end portion;
a mating contact portion formed at the second end portion; and
an intermediate portion joining the first end portion and the second end portion, wherein at least the intermediate portion comprises broadsides and edges;
forming a plurality of subassemblies by, for each subassembly of the plurality of subassemblies:
inserting an intermediate portion of a signal conductor of the plurality of signal conductors into each first groove of the plurality of first grooves of a respective insulative portion;
inserting an intermediate portion of a signal conductor of the plurality of signal conductors into each second groove of the plurality of second grooves of the respective insulative portion, wherein the plurality of first grooves are aligned in the first direction with respective second grooves of the plurality of second grooves such that at least the intermediate portions of the signal conductors inserted into respective first and second grooves form broadside coupled pairs;
attaching a first reference conductor on the first side of the respective insulative portion; and
attaching a second reference conductor on the second side of the respective insulative portion; and
arranging the plurality of subassemblies side-by-side.
18. The method of claim 17 , further comprising
attaching covers to each of the subassemblies so as to hold the signal conductors in the plurality of first grooves and the plurality of second grooves.
19. The method of claim 18 , wherein:
attaching the covers controls a separation between the first and second reference conductors and the signal conductors in the plurality of first grooves and the plurality of second grooves.
20. The method of claim 18 , further comprising:
inserting a lossy member into each of the subassemblies between intermediate portions of the signal conductors inserted into adjacent first grooves.
21. The method of claim 17 , further comprising, for each of the plurality of subassemblies:
inserting a lossy member into each of the subassemblies between signal conductors inserted into respective first and second grooves aligned in the first direction.
22. The method of claim 17 , wherein:
arranging the plurality of subassemblies side-by-side comprises inserting portions of the subassemblies comprising the mating contact portions of the plurality of signal conductors into a housing portion.
23. The method of claim 17 , further comprising, for each of the plurality of subassemblies:
adding lossy material having a conductivity between 1 Siemen/meter and 10,000 Siemen/meter in contact with the first reference conductor and the second reference conductor.
24. The method of claim 23 , further comprising,
connecting, with a conductive structure, the lossy material of the plurality of subassemblies.