Cable Surface Wave Coupling for Low-Loss Broadband Transmission

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Solution Overview

Problem

Current wireless infrastructure faces challenges in providing high bandwidth due to increased data usage, particularly in supporting smart phone and portable device demands, and existing technologies struggle to efficiently utilize transmission media like cables for guided electromagnetic waves without requiring electrical circuits.

Innovation Solution

A guided wave communication system that induces electromagnetic waves on transmission media like cables, allowing for data transmission without an electrical return path, using couplers and transceivers to launch and extract guided waves, enabling efficient data transfer along the cable's surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional wireless infrastructure is used to provide broadband access, then coverage area is maintained, but bandwidth capacity is insufficient to meet increased data usage demands

Engineering Contradiction:

Improvebandwidth capacityVSAvoidpropagation losses

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent replaces traditional electromagnetic wave propagation through air (wireless) with guided wave propagation along a physical transmission medium (cable). This substitution allows signals to be confined and guided along the cable surface, dramatically reducing propagation losses and enabling long-distance transmission with minimal energy loss, thereby resolving the contradiction between maintaining coverage and increasing bandwidth capacity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a cable as an intermediary transmission medium between the transmitter and receiver. The cable serves as a guided path that confines and directs electromagnetic waves, reducing energy loss compared to free-space propagation. This intermediary enables high-bandwidth transmission over long distances by providing a controlled propagation environment

Inventive Principle:

Principle #24Intermediary (Mediator)

2Length of moving object

If wireless signals are transmitted over long distances, then coverage area is maintained, but signal strength decreases due to propagation losses

Engineering Contradiction:

Improvetransmission distanceVSAvoidsignal strength loss

Core Design Contradiction:

Length of moving objectVSLoss of energy

Solution Approach 1:

The patent substitutes free-space wireless propagation with guided wave propagation along a cable. The cable physically guides the electromagnetic waves, preventing energy dissipation into the surrounding environment. This allows signals to travel long distances along the cable with minimal attenuation, resolving the contradiction between transmission distance and signal strength

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If more bandwidth is provided to meet data demands, then service capacity increases, but infrastructure complexity increases

Engineering Contradiction:

Improveservice capacityVSAvoidinfrastructure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent enables existing cable infrastructure to serve dual purposes: traditional power distribution and high-bandwidth data transmission. By guiding electromagnetic waves along the cable surface, the system allows a single infrastructure to provide both electrical power and communication services, increasing service capacity without proportionally increasing infrastructure complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 system enhances bandwidth capacity by allowing guided electromagnetic waves to propagate with minimal loss, supporting increased data demands without the need for electrical circuits, thus improving wireless infrastructure efficiency.

Implementation Method 1

inducing electromagnetic waves on a cable

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

propagation of signals along a transmission medium without the need for an electrical circuit, using couplers and transceivers to launch and extract guided waves

Methodology Applied

Scientific EffectDielectric guidance: Dielectric

Data Source

PatentUS10129057B2Apparatus and methods for inducing electromagnetic waves on a cable

Publication Date: 2018.11.13 AT&T INTELLECTUAL PROPERTY I L P

AI summary

Aspects of the subject disclosure may include, receiving a communication signal, and generating an electromagnetic wave that propagates along an outer surface of a dielectric layer environmentally formed on a cable. The dielectric layer can be a liquid disposed on an outer surface of the cable that enables the electromagnetic wave to propagate along the dielectric layer of the cable without an electrical return path, and conveys the communication signal. Other embodiments are disclosed.