Receptacle Connector Crosstalk Reduction via Angular Contact Rows
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Solution Overview
Problem
Conventional transceiver assemblies face challenges in handling increased signal rates and higher signal path densities, leading to crosstalk and impedance discontinuities, which result in errors and signal attenuation.
Innovation Solution
The design incorporates a receptacle connector with signal and auxiliary contacts arranged in specific rows and columns within a housing, using dielectric bodies to hold contacts, and grounding contacts between differential pairs to reduce crosstalk and maintain impedance, allowing for higher data transmission rates up to 25 Gbps or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If signal paths are densely grouped to increase device size reduction, then device size is reduced, but crosstalk between adjacent differential pairs increases
Solution Approach 1:
The contact array is segmented into multiple rows with different orientations. Specifically, signal contacts are arranged in rows where adjacent contacts are oriented at angles to each other (e.g., 45 degrees), creating distinct segments that reduce electromagnetic coupling between adjacent differential pairs while maintaining high density
Solution Approach 2:
The patent transitions from a conventional single-row linear arrangement to a multi-row two-dimensional array structure. By organizing contacts in multiple rows with angular orientations and using dielectric bodies to hold contacts at specific positions, the design achieves higher density while controlling crosstalk through spatial separation in multiple dimensions
2Speed
If signal rate is increased to satisfy demand for faster devices, then data transmission speed is improved, but signal attenuation and errors increase
Solution Approach 1:
The patent applies different structural characteristics to different parts of the contact array. Each differential pair is held by a separate dielectric body with specific geometric features (e.g., rounded corners, specific thickness) that are optimized for local impedance control, while the overall array structure provides global crosstalk reduction. This localized optimization maintains signal integrity at high speeds
Solution Approach 2:
The patent changes the geometric parameters of the contact arrangement, including the angular orientation of adjacent contacts, the spacing between contacts in different rows, and the dimensions of dielectric bodies. These parameter changes are designed to maintain controlled impedance (e.g., 100 ohms differential) while reducing crosstalk, enabling reliable high-speed transmission
3Volume of moving object
If contact density is increased to reduce device size, then device size is reduced, but impedance control becomes difficult
Solution Approach 1:
Each dielectric body is designed with specific local geometric features (thickness, corner radius, material properties) that are optimized to maintain controlled impedance for its associated differential pair. This localized design approach allows impedance control even in high-density configurations where global uniformity is difficult to achieve
Solution Approach 2:
The patent employs specific geometric parameters including the angle between adjacent contact rows (e.g., 45 degrees), the spacing between contacts, and the dimensions of dielectric bodies. These parameters are carefully selected and controlled to maintain consistent differential impedance (e.g., 100 ohms) across the high-density contact array
Data Source
AI summary
A receptacle connector includes a housing having a slot configured to receive a mating connector therein. Contacts are held by the housing. The contacts include mating segments that are arranged side-by-side within a row that extends along a row axis. The mating segments of the contacts include mating interfaces that are exposed within the slot for engagement with the mating connector. The contacts include a differential pair of signal contacts. The mating segments of the signal contacts within the differential pair are arranged within a column that extends along a column axis that is oriented non-parallel to the row axis.