F-Connector Faraday Shield for RF Interference Suppression
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Solution Overview
Problem
New satellite receiver systems employing MOCA technology require advanced RF interference suppression to prevent spurious signals from entering the coaxial cable system, as they introduce two-way communication and high-speed digital signals, necessitating a three-order-of-magnitude lower interference level than previous systems, while existing solutions face challenges in high-volume production and secure connection of F-connector shields.
Innovation Solution
A Faraday shield is implemented around the center pin of the F-connector with a metal cover and extended tab design, ensuring comprehensive coverage and secure assembly, using existing standard components and factory techniques, and a small barbed tab latch for precise placement, to prevent radiated interference and current-induced issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a Faraday shield is implemented around the center pin of the F-connector, then RF interference suppression is improved by 3 orders of magnitude, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent implements a nested shield structure where an inner Faraday shield surrounds the center pin of the F-connector, and an outer shield encloses the entire F-connector assembly. This nested configuration creates multiple layers of RF interference suppression, achieving 3 orders of magnitude improvement while organizing the complex structure in a systematic, manageable way that facilitates manufacturing.
Solution Approach 2:
The shield structure is divided into distinct segments: the inner Faraday shield, the outer shield, and the connecting tab. Each segment serves a specific function and can be manufactured and assembled separately, reducing overall manufacturing complexity despite the enhanced protection requirements.
2Reliability
If a metal cover with extended tab design is used, then secure connection of F-connector shield is improved, but ease of manufacture decreases
Solution Approach 1:
The patent combines the shield structure with the F-connector assembly by integrating the connecting tab directly into the shield design. This tab extends from the shield and connects to the F-connector body, merging two components into one integrated assembly that ensures reliable electrical and mechanical connection while simplifying the manufacturing process through reduced part count.
Solution Approach 2:
The extended tab is pre-formed as part of the shield structure during manufacturing, establishing the connection path before final assembly. This preliminary formation of the connection element ensures proper alignment and secure attachment when the shield is installed on the F-connector, improving reliability without requiring complex assembly operations.
3Object-affected harmful factors
If comprehensive shield coverage is implemented, then RF interference ingress is reduced by 3 orders of magnitude, but productivity in high-volume production decreases
Solution Approach 1:
The patent designs the shield structure as a universal component that can be applied to all F-connectors in the satellite receiver system. The standardized shield assembly with integrated tab can be mass-produced using the same manufacturing process and installed on every connector, achieving comprehensive RF protection while maintaining productivity through economies of scale and consistent assembly procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces RF interference ingress by 3 orders of magnitude, maintaining high-volume production feasibility and ensuring reliable assembly, thereby enhancing the satellite receiver's communication integrity and resistance to external interference.
Implementation Method 1
A Faraday shield is implemented around the center pin of the F-connector with a metal cover and extended tab design
Implementation Method 2
ensuring comprehensive coverage and secure assembly, using existing standard components and factory techniques, and a small barbed tab latch for precise placement, to prevent radiated interference and current-induced issues
Data Source
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AI summary
An RF interference suppressor for satellite receivers and more specifically those that employ the MOCA standard is provided. The RF interference suppressor shields the connection point of the center conductor of the F-connector to the PC board from spurious signals emanating from the high speed digital portions of the receiver. In addition, the RF interference suppressor shield includes a tab portion that encompasses the threaded portion of the F-connector and operates to shield the path for RF interference resulting from the gap between the F-connector body and the inner shield wall of the receiver.