Communication Substrate Grounding for Signal Stability

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Solution Overview

Problem

Existing communication systems face communication errors due to variations in distance between communication apparatuses and instability in the electrical connection between resistors and metal grounds, leading to fluctuations in reflection characteristics.

Innovation Solution

A communication apparatus is designed with substrates having transmission lines and a metal portion acting as a ground, where the substrates are firmly fixed to the metal portion on surfaces other than where the transmission lines are located, stabilizing the connection and minimizing distance variations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If substrates are not firmly fixed to metal grounds, then device complexity is reduced and ease of manufacture is improved, but communication reliability deteriorates due to unstable electrical connections and varying reflection characteristics

Engineering Contradiction:
Improvecommunication reliabilityVSAvoidsubstrate fixation structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The metal ground is divided into multiple separate metal grounds positioned at different locations on the substrate. Each metal ground is independently connected to the substrate through dedicated connection structures, allowing stable electrical connections without requiring complex overall fixation mechanisms. This segmentation enables reliable signal grounding while keeping individual connection structures simple.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Connection structures serve as intermediary elements between the substrate and metal grounds. These intermediaries provide stable electrical connections through dedicated pathways, eliminating the need for direct complex fixation while ensuring reliable signal reference. The connection structures act as mediators that simplify the overall system while maintaining connection stability.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If substrates are firmly fixed to metal grounds, then communication reliability is improved through stable electrical connections, but ease of manufacture deteriorates due to additional fixation requirements

Engineering Contradiction:
Improveelectrical connection stabilityVSAvoidsubstrate assembly process
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The connection structures are merged with the metal grounds into an integrated assembly. The connection structures are formed as part of the metal ground system, combining the grounding function and connection function into a single manufacturable unit. This merging simplifies assembly by reducing the number of separate components while ensuring stable electrical connections between substrates and grounds.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The connection structures serve multiple functions simultaneously: they provide electrical connections to metal grounds, serve as mechanical reference points for substrate positioning, and act as signal reference pathways. This multi-functionality reduces the need for separate fixation mechanisms, improving ease of manufacture while maintaining connection stability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If distance between communication apparatuses varies, then adaptability is improved for different installation scenarios, but communication reliability deteriorates due to varying signal strength and reflection characteristics

Engineering Contradiction:
Improveinstallation scenario flexibilityVSAvoidsignal transmission stability
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

Multiple metal grounds are positioned at different locations on the substrate to provide localized electromagnetic shielding and reference potentials at various points along the transmission path. This local quality approach ensures that signal reference characteristics remain stable regardless of the overall distance between communication apparatuses, as each local region has its own optimized grounding conditions.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The grounding structure transitions from a single-point reference to a distributed multi-point reference system across the substrate. By adding the spatial dimension of multiple metal grounds positioned at different locations, the system maintains stable electrical characteristics over varying distances without sacrificing adaptability to different installation scenarios.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 configuration reduces communication errors by stabilizing reflection characteristics and maintaining strong wireless communication signals, even during rotations or movements of the communication apparatuses.

Implementation Method 1

a first substrate fixed to a metal portion

Methodology Applied
Scientific EffectMechanical bonding: Adhesive

Implementation Method 2

a first transmission line... a first termination circuit configured to terminate the first transmission line

Methodology Applied
Scientific EffectElectromagnetic transmission: Electromagnetic Induction

Implementation Method 3

a metal portion functioning as a ground for the first substrate

Methodology Applied
Scientific EffectElectrical grounding: Ground Effect

Data Source

PatentUS20250175369A1Communication apparatus and communication system
Publication Date: 2025.05.29 CANON KK
  • US20250175369A1 patent drawing
  • US20250175369A1 patent drawing
  • US20250175369A1 patent drawing

AI summary

A communication apparatus includes a first substrate including a first transmission line, a metal portion functioning as a ground for the first substrate, spaced apart from the first transmission line, and a first termination circuit configured to terminate the first transmission line. The first substrate is fixed to any one of surfaces of the metal portion other than a surface where the first transmission line is disposed.