Coaxial RF Terminator Assembly for Minimal Signal Reflection

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Solution Overview

Problem

Existing coaxial RF terminators struggle to effectively terminate high-frequency signals, leading to undesired signal reflections and interference due to the difficulty in terminating open ports in coaxial cable systems.

Innovation Solution

A coaxial terminator design featuring a female connector, outer housing, center conductor, cured resin dielectric, and resistive elements, with adjustable impedance control through a tuning screw, ensures minimal signal reflection by grounding RF signals through a parallel resistor configuration and dielectric isolation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional coaxial terminators are used for high-frequency signals, then the structure is simple and easy to manufacture, but signal reflection and interference increase due to ineffective termination

Engineering Contradiction:

Improvesignal termination effectivenessVSAvoidterminator structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The terminator is divided into distinct functional segments: a connector portion for mating with the coaxial port, a body portion containing the resistive element, and a cured resin dielectric portion providing isolation. This segmentation allows each component to be optimized for its specific function while maintaining overall effectiveness at high frequencies.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A cured resin dielectric is introduced as an intermediary material between the conductive components (connector, body, resistive element). This dielectric mediator provides electrical isolation and maintains precise geometric relationships between components, which is critical for maintaining characteristic impedance and reducing signal reflection at high frequencies.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the terminiator uses fixed impedance design, then manufacturing is easier, but adaptability to different frequency ranges is reduced

Engineering Contradiction:

Improvefrequency range adaptabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The terminator incorporates an adjustable impedance mechanism allowing the resistive element's position or value to be modified after manufacturing. This dynamic adjustment capability enables the same terminator design to be adapted to different frequency ranges and impedance requirements without requiring multiple fixed designs, thereby improving versatility while maintaining manufacturing efficiency.

Inventive Principle:

Principle #15Dynamics

3Reliability

If no dielectric isolation is used, then the structure is simpler, but signal integrity deteriorates due to increased reflection and interference

Engineering Contradiction:

Improvesignal integrityVSAvoiddielectric isolation structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The cured resin dielectric serves as an intermediary isolation layer between conductive elements, providing electrical insulation and maintaining precise spatial relationships. This dielectric mediator prevents unwanted capacitive coupling and signal leakage, thereby preserving signal integrity at high frequencies while adding minimal structural complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The dielectric material's physical and electrical parameters (permittivity, loss tangent, curing characteristics) are specifically selected and controlled to optimize performance at high frequencies. By carefully controlling the dielectric's parameter properties, the terminator achieves superior signal integrity without requiring overly complex structural arrangements.

Inventive Principle:

Principle #35Parameter changes

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 design provides improved high-frequency signal termination with minimal reflection, maintaining signal integrity and reducing interference in coaxial cable systems.

Implementation Method 1

The cured resin dielectric is cured in place between the center conductor and the outer housing

Methodology Applied

Scientific EffectDielectric isolation: Dielectric

Implementation Method 2

The one or more resistive elements are in electrical communication at a first end with the center conductor and at a second end with the inner housing

Methodology Applied

Scientific EffectElectrical resistance: Electrical Resistance

Data Source

PatentUS12567707B2Devices, assemblies, and methods for terminating coaxial radiofrequency ports

Publication Date: 2026.03.03 CORNING OPTICAL COMM RF LLC

AI summary

A coaxial terminator for terminating a coaxial equipment port includes a female connector, an outer housing, at least one support element, a center conductor, cured resin dielectric, and one or more resistive elements. The female connector is disposed within the outer housing, is supported within the outer housing by the at least one support element, and is configured to receive a male pin of the coaxial equipment port. The center conductor has a proximal portion and a distal portion and is coaxially coupled to the female connector at the proximal portion and encircled by cured resin dielectric at the distal portion. The cured resin dielectric is cured in place between the center conductor and the outer housing. The one or more resistive elements are in electrical communication at a first end with the center conductor and at a second end with the inner housing.