Communication Device Antenna Substrate Segmentation

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Solution Overview

Problem

Conventional communication devices are large due to the need for a special area around the antenna unit to isolate it from metal components, increasing the size of the substrate and affecting antenna performance.

Innovation Solution

The antenna unit is positioned along the inner wall surface of the main body case, away from other metal components, allowing the substrate to be smaller without a dedicated metal-free area, and is formed by flexible substrates linked together to optimize size and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the antenna unit is mounted on the same substrate as metal components (controller, communication IC, battery), then the device structure is simplified, but the antenna performance deteriorates due to interference from nearby metal

Engineering Contradiction:

Improvedevice structureVSAvoidantenna performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The substrate is divided into a first substrate for mounting metal components and a second substrate for mounting the antenna unit. This segmentation allows each substrate to be optimized for its specific function, preventing interference between metal components and the antenna while maintaining a simplified overall device structure.

Inventive Principle:

Principle #1Segmentation

2Reliability

If a special metal-free area is provided around the antenna unit to isolate it from metal components, then the antenna performance is improved, but the substrate size increases

Engineering Contradiction:

Improveantenna performanceVSAvoidsubstrate size

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

By segmenting the substrate into two separate substrates (first substrate for metal components, second substrate for antenna), the need for large metal-free isolation areas on a single substrate is eliminated. This reduces the overall substrate size while ensuring antenna performance through physical separation.

Inventive Principle:

Principle #1Segmentation

3Area of stationary object

If the communication device is made smaller by reducing substrate size, then the device compactness is improved, but the antenna unit becomes more susceptible to interference from metal components

Engineering Contradiction:

Improvesubstrate sizeVSAvoidmetal interference to antenna

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A connection substrate is introduced as an intermediary between the first substrate (metal components) and the second substrate (antenna unit). This connection substrate electrically connects the antenna unit to the communication IC while maintaining physical separation between metal components and the antenna, thus preventing interference.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Area of stationary object

If the antenna unit is positioned close to metal components to reduce device size, then the device compactness is improved, but the antenna stability deteriorates due to interference

Engineering Contradiction:

Improvedevice sizeVSAvoidantenna stability

Core Design Contradiction:

Area of stationary objectVSStability of the object's composition

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3764465B1Communication device

Publication Date: 2023.03.01 PHC HLDG CORP

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AI summary

A transmitter (7) comprises a main body case (20), a controller (13) that is provided inside the main body case (20), a communication unit (17) that is connected to the controller (13), and an elongated antenna unit (18) that is connected to the communication unit (17). The antenna unit (18) is disposed along an inner wall surface (20aa) of the main body case (20).