An electrical connector system includes a daughter card connector formed of a plurality of wafers. Each wafer is formed with cavities between the contacts of the signal conductors. The cavities are shaped to receive lossy inserts whereby crosstalk is reduced. The connector system may also or alternatively include a front housing formed with shield plates also to aid in reducing cross-talk. The front housing is adapted to mate between the wafers of the daughter card connector and a backplane connector of the electrical connector system. In an alternative embodiment, the front housing portion may include lossy conductive portions for cross-talk reduction.

Connector with improved shielding in mating contact region

An improved broadside coupled, open pin field connector. The connector incorporates lossy material to selectively dampen resonance within pairs of conductive members connected to ground when the connector is mounted to a printed circuit board. The material may also decrease crosstalk and mode conversion. The lossy material is selectively positioned to substantially dampen resonances along pairs that may be connected to ground without unacceptably attenuating signals carried by other pairs. The lossy material may be selectively positioned near mating contact portions of the conductive members. Multiple techniques are described for selectively positioning the lossy material, including molding, inserting lossy members into a housing or coating surfaces of the connector housing. The lossy material alternatively may be positioned between broad sides of conductive members of a pair. By using material of relatively low loss, loss when the conductive members are used to carry signals is relatively low, but an appreciable attenuation of resonances is provided on pairs connected to ground. As a result, an overall improvement of signal to noise ratio is achieved.

High-frequency electrical connector

An improved open pin field connector is provided for enhanced performance when carrying high speed signals by selective application of one or more techniques for controlling electrical performance parameters. Lossy material may be positioned adjacent to conductive elements of the connector so as to reduce resonance in pairs of conductive elements and/or to provide a desired characteristic impedance for pairs of differential signal conductors. The lossy material may be shaped and positioned to avoid capacitive coupling that might otherwise increase cross talk. In a right angle connector, the lossy material may have a step-wise increase in thickness to provide comparable loss along longer and shorter conductive elements. Conductive elements may be shaped to balance performance characteristics of pairs selected to carry differential signals regardless of orientation along a row or column. Alternatively, conductive elements may have narrowed regions, covered with lossy portions, for reducing resonance while supporting DC signal propagation.

High bandwidth connector

Techniques for improving electrical performance of a connector. The techniques are compatible with the form factor of a standardized connector, such as an SFP connector or stacked SFP. The resulting connector has reduced insertion loss for high speed signals. Such techniques, which can be used separately or together, include shaping of conductive elements within the connector while still retaining the same mating contact arrangement. Changes may be made at the contact tail portions or in the intermediate portions where engagement to a connector housing occurs. The techniques also include the incorporation of lossy bridging members between conductive elements designated to be ground conductors. For connectors according to the stacked SFP configuration, multiple bridging members may be incorporated at multiple locations within the connector.

High performance, small form factor connector

A cable connector with improved performance and ease of use. The connector has staggered ports to reduce crosstalk and to prevent incorrect insertion of a plug into a receptacle. The plug may be constructed with subassemblies, each of which has a lossy central portion. Conductive members embedded within an insulative housing of the subassemblies may be used to electrically connect ground conductors within the subassemblies. Further, the connector may have a quick connect locking screw that can be engaged by pressing on the screw, but requires rotation of the screw to remove. Additionally, a ferrule may be used in making a mechanical connection between a cable bundle and a plug and making an electrical connection between a braid of the cable bundle and a conductive shell of the plug. The ferrule may be in multiple pieces for easy attachment while precluding deformation of the cable, which disrupts electrical performance.

High performance cable connector

A broadband high frequency balun is connectable between balanced and unbalanced transmission lines so that these lines are essentially colinear. The balun comprises a coaxial cable and a shorted stub in approximately a half-loop configuration, the balanced line being connected to the cable and stub within a conductive housing or shield. The cable-stub spacing is substantially greater than the effective length of the stub, thereby decreasing the lower frequency operating limit of the balun. The addition of a lossy layer to the inner surface of the housing permits a substantial increase in the operating bandwidth of the balun by suppressing adverse resonance effects within the housing.

J Epis

Papers

Broadband high frequency balun