RF Connector Alignment Features for Low-Loss Signal Pad Contact
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Solution Overview
Problem
Misalignment between the compression end of an RF conductor and its corresponding signal trace pad leads to unwanted insertion loss and degraded signal integrity due to the 'swing and a miss' effect, resulting in increased insertion loss.
Innovation Solution
Incorporating aligners on the connector housing, such as notches, recesses, or protrusions, that cooperate with fiducials, markings, or anti-pads on the substrate to ensure precise alignment, along with the use of alignment pegs and anti-pads to maintain proper positioning during attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the signal trace pad area is increased to provide a larger target for the compression end, then the alignment tolerance is improved, but the substrate area consumption increases
Solution Approach 1:
The alignment function is segmented into two independent components: fiducial markers on the substrate and corresponding aligners on the connector housing. This separation allows the signal trace pad to remain compact while alignment precision is maintained through the fiducial-aligner reference system, eliminating the need to enlarge the pad area for tolerance compensation.
Solution Approach 2:
Fiducial markers serve as intermediary reference elements between the connector positioning system and the signal trace pad. These markers provide a stable reference framework that mediates the alignment process, allowing precise positioning without requiring the signal trace pad itself to be enlarged.
2Manufacturing precision
If manual alignment procedures are used to position the compression end on the signal pad, then the alignment precision can be improved, but the installation time increases
Solution Approach 1:
Fiducial markers are pre-positioned on the substrate during substrate fabrication, and corresponding aligners are pre-formed on the connector housing during connector manufacturing. This preliminary preparation of alignment references eliminates the need for time-consuming manual alignment procedures during installation, as the pre-established fiducial-aligner correspondence enables direct positioning.
Solution Approach 2:
The fiducial markers and aligners create a self-aligning system where the connector automatically positions itself relative to the substrate through the pre-established reference correspondence. This self-service alignment mechanism eliminates the need for operator intervention and manual adjustment, thereby reducing installation time while maintaining precision.
3Device complexity
If no alignment features are provided on the connector housing, then the device complexity is reduced, but the alignment accuracy between compression end and signal pad deteriorates
Solution Approach 1:
Rather than making the entire connector housing complex, the alignment function is localized to specific features: simple fiducial markers on the substrate and corresponding aligners (such as notches, protrusions, or recesses) on the connector housing. This localized approach provides the necessary alignment accuracy without significantly increasing overall device complexity.
Data Source
AI summary
An electrical connector includes a housing and an aligner. The aligner is defined by a connector base of the housing or by an alignment peg. The aligner defined by the connector base is configured to cooperate with a corresponding fiducial to properly align the electrical connector on a mounting surface of a substrate. The aligner defined by an alignment peg includes a main body and an embossed portion that defines a protrusion that extends from the main body. The embossed portion is configured to mate with a raised or recessed portion of a substrate to properly locate and align the electrical connector to the substrate.