Moving Transmission Line Coupling for Stable Wireless Reception

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Solution Overview

Problem

Conventional wireless communication systems face challenges in maintaining stable signal reception when using movable transmission lines due to issues with electromagnetic field coupling and signal interference, particularly when the receiving transmission line moves over opposed feeding or termination points, leading to unusable signal outputs for demodulation processing.

Innovation Solution

The proposed wireless communication system includes a transmission apparatus with sending transmission lines where either the feeding or termination points are opposed, and a reception apparatus with a receiving transmission line that moves along the sending transmission lines to establish electromagnetic field coupling, using combiners and a differential filter to combine and filter signals, and a comparator for demodulation processing, ensuring stable signal reception even when moving over opposed points.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a receiving transmission line moves along sending transmission lines to enable wireless communication, then cableless communication is achieved, but signal reception becomes unstable when moving over opposed feeding or termination points

Engineering Contradiction:

Improvecableless communicationVSAvoidsignal reception stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The receiving transmission line is divided into two separate receiving transmission lines, each connected to one of two sending transmission lines. This segmentation allows the system to switch between different signal paths depending on the movement position, avoiding the problem of signal degradation when moving over opposed feeding or termination points.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The outputs of the two receiving transmission lines are combined through a combiner to produce a composite output signal. This merging of multiple signal paths ensures continuous stable reception by combining signals from both sending transmission lines, maintaining reliability even when the receiving assembly moves.

Inventive Principle:

Principle #5Merging (Combining)

2Use of energy by moving object

If two directional couplers are arranged with signal output ends opposed to each other for signal reception, then electromagnetic signal coupling is achieved, but signal output becomes unusable for demodulation when moving over opposed points

Engineering Contradiction:

Improveelectromagnetic signal couplingVSAvoidsignal output usability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

Instead of arranging the receiving transmission lines with output ends opposed to each other, the invention arranges them with input ends opposed to each other. This inversion of the arrangement resolves the signal cancellation problem that occurs when moving over opposed feeding or termination points, making the output signal usable for demodulation.

Inventive Principle:

Principle #13The other way round (Inversion)

3Device complexity

If signal processing is simplified for wireless communication, then device complexity is reduced, but signal interference increases when moving over opposed feeding or termination points

Engineering Contradiction:

Improvesignal processing structureVSAvoidsignal interference

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

A combiner is introduced as an intermediary component to combine the outputs of two receiving transmission lines. This simple intermediary device effectively reduces signal interference by combining signals from both paths, maintaining signal quality without significantly increasing device complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 enables stable demodulation of signals even when the receiving transmission line moves over opposed feeding or termination points, reducing signal interference and maintaining effective communication by adjusting signal processing based on the movement position of the receiving transmission line.

Implementation Method 1

a receiving transmission line configured to move along the at least two sending transmission lines, establish electromagnetic field coupling with the sending transmission lines, and receive an excited signal

Methodology Applied

Scientific EffectElectromagnetic field coupling: Electromagnetic Induction

Data Source

PatentUS20250023249A1Wireless communication system, reception apparatus, and control method

Publication Date: 2025.01.16 CANON KK

AI summary

A wireless communication system includes a transmission apparatus and a reception apparatus. The transmission apparatus includes two or more sending transmission lines located with feeding points of a signal or termination points opposed to each other, and a transmission unit configured to input the signal to the feeding points of the two or more sending transmission lines. The reception apparatus includes a receiving transmission line configured to establish electromagnetic field coupling with the sending transmission lines, and a comparator configured to input signals from one end and the other end of the receiving transmission line.