NFC Radio Equipment Cover Shape Optimization

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Solution Overview

Problem

Existing radio equipment designs suffer from reduced sensitivity in near field communication due to the cylindrical shape of the cover portion, which creates a distance between the cover and substrate surfaces, and makes it difficult to determine the position of the NFC antenna, leading to suboptimal provisioning and communication performance.

Innovation Solution

The radio equipment features a cover portion with a smaller external shape at the opposing portion where the NFC antenna is located, forming a flat plane to reduce distance to the substrate, and includes a mark to indicate the antenna's position, allowing for improved NFC sensitivity and easier alignment with information terminal devices. The cover portion is designed to attach to the base portion with a screwing mechanism that prevents reverse orientation and includes a rotation restricting mechanism to maintain proper alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If a cylindrical cover portion is used, then the device has a compact and simple structure, but the distance between the cover and substrate surfaces increases, reducing NFC sensitivity

Engineering Contradiction:

Improvecylindrical cover shapeVSAvoidNFC sensitivity

Core Design Contradiction:

ShapeVSManufacturing precision

Solution Approach 1:

The cover portion is designed with different shapes at different locations: a flat plane at the opposing portion (where NFC antenna is located) and a cylindrical shape at other portions. This local differentiation allows the flat surface to minimize distance to the substrate for improved NFC sensitivity, while maintaining the compact cylindrical overall structure.

Inventive Principle:

Principle #3Local quality

2Shape

If the cover portion is made cylindrical, then the structure is simple, but the position of the NFC antenna cannot be determined from outside

Engineering Contradiction:

Improvecylindrical cover structureVSAvoidantenna position identification

Core Design Contradiction:

ShapeVSEase of operation

Solution Approach 1:

A mark indicating the NFC antenna position is provided on the outer surface of the cover portion. This visual indicator allows users to easily identify and locate the antenna position from outside the device, facilitating proper alignment during NFC operations without compromising the simple cylindrical structure.

Inventive Principle:

Principle #32Color changes

3Manufacturing precision

If a flat plane is created at the opposing portion, then NFC sensitivity is improved, but the cover portion structure becomes more complex

Engineering Contradiction:

ImproveNFC communication sensitivityVSAvoidcover portion geometry

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP3487080B1Radio equipment which improves the sensitivity of the near field communication

Publication Date: 2021.01.27 YOKOGAWA ELECTRIC CORP

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AI summary

Radio equipment 1 includes a first substrate 31 on which a first antenna 33 for near field communication is provided, a base portion 10 on which the first substrate 31 is erected, and a cover portion 20 configured to be attached to the base portion 10 so as to cover the first substrate 31. The cover portion 20 includes an opposing portion 26 configured to oppose the first antenna 33 and a non-opposing portion 27 disposed closer to the base portion 10 than the opposing portion 26 in a direction in which the first substrate 31 is erected. A distance D1 from an outer surface of the cover portion 20 to the first substrate 31 at the opposing portion 26 is shorter than a distance D2 from the outer surface of the cover portion 20 to the first substrate 31 at the non-opposing portion 27.