Coaxial Connector Waveguide RF Ingress Reduction
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Solution Overview
Problem
Existing coaxial cable connectors, particularly F-Type connectors, fail to effectively prevent radio frequency (RF) ingress when left open, leading to signal interference in cable television and satellite television systems, and current solutions are either expensive, impractical, or mechanically unreliable.
Innovation Solution
The use of electromagnetic radiation shields, such as waveguides with specific geometries and materials, is implemented to restrict RF ingress by redistributing electric charges within a metallic shield, effectively canceling external radiation effects and blocking unwanted RF signals at connector openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional connector shielding is used, then RF ingress reduction is achieved to some extent, but the solution is expensive and mechanically unreliable
Solution Approach 1:
The patent changes the geometric parameters of the connector opening by adding a waveguide structure with specific dimensions (length, width, and depth) that create electromagnetic standing waves to cancel RF ingress. This geometric parameter modification provides a reliable and cost-effective solution compared to traditional shielding materials.
Solution Approach 2:
The waveguide structure acts as an intermediary element between the external RF environment and the connector internals. It introduces electromagnetic fields that interfere with and cancel the harmful RF ingress signals, providing protection without requiring complex mechanical shielding.
2Object-affected harmful factors
If traditional connector shielding is used, then RF ingress reduction is achieved, but the solution is expensive
Solution Approach 1:
The invention modifies the connector geometry by adding a waveguide structure with specific dimensional parameters rather than using expensive shielding materials. This approach reduces manufacturing costs while achieving effective RF ingress reduction through electromagnetic field manipulation.
Solution Approach 2:
The patent replaces mechanical/electrical shielding solutions with an electromagnetic field-based waveguide structure. This substitution eliminates the need for expensive conductive materials and complex shielding assemblies, providing a more cost-effective manufacturing solution.
3Ease of operation
If the connector is left open for accessibility, then ease of operation is improved, but RF ingress increases significantly
Solution Approach 1:
The waveguide structure is applied locally at the connector opening where RF ingress occurs, rather than requiring complete enclosure of the connector. This localized solution maintains the open design for accessibility while providing targeted RF protection at the vulnerable entry point.
Solution Approach 2:
The waveguide structure converts the open connector design, which normally allows RF ingress, into a beneficial feature by using the open space to create electromagnetic standing waves that actively cancel harmful signals. The openness that causes the problem becomes part of the solution mechanism.
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
This solution significantly reduces RF ingress by 20-40 dB, maintaining a nominal connector impedance of 75 ohms, thus enhancing signal quality and reducing noise in CATV systems while being more cost-effective and reliable than existing methods.
Implementation Method 1
The use of electromagnetic radiation shields, such as waveguides with specific geometries and materials, is implemented to restrict RF ingress by redistributing electric charges within a metallic shield, effectively canceling external radiation effects
Implementation Method 2
electromagnetic radiation shields, such as waveguides with specific geometries and materials, is implemented to restrict RF ingress
Data Source
AI summary
A coaxial connector with an F female end shield is configured to restrict RF ingress.