Radiation Detector Housing Layout for Efficient Radio Wave Transmission

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Solution Overview

Problem

Existing radiation detection apparatuses face challenges in efficiently propagating radio waves from an antenna within the housing to the outside, which affects power conservation and communication efficiency.

Innovation Solution

The apparatus incorporates a reflective member and radio wave transmission regions in the housing design to enhance radio wave propagation, using a conductive material for the reflective member and removing conductive material in specific areas to create higher transmittance regions, along with optimizing the distance and alignment of the antenna and reflective member for phase inversion and resonance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a conductive housing is used for radiation detection apparatus, then shielding and structural integrity are improved, but radio wave propagation from antenna to outside is hindered

Engineering Contradiction:
Improveshielding effectivenessVSAvoidradio wave propagation efficiency
Core Design Contradiction:
Object-affected harmful factorsVSUse of energy by moving object

Solution Approach 1:

The housing is segmented into conductive portions and non-conductive portions. The non-conductive portions are strategically positioned to allow radio wave propagation while the conductive portions provide shielding. This segmentation resolves the contradiction by spatially separating the shielding function from the radio wave transmission function.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different portions of the housing have different material properties: some areas are conductive for shielding while other areas are non-conductive for radio wave transmission. The non-conductive portions are locally positioned at the antenna side to enable efficient radio wave propagation while maintaining overall shielding effectiveness in other regions.

Inventive Principle:
Principle #3Local quality

2Use of energy by moving object

If non-conductive cover is used to improve radio wave propagation, then radio wave transmission is improved, but shielding effectiveness is reduced

Engineering Contradiction:
Improveradio wave propagation efficiencyVSAvoidshielding effectiveness
Core Design Contradiction:
Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The housing structure is divided into multiple functional zones: non-conductive portions positioned near the antenna for optimal radio wave propagation, and conductive portions positioned in other areas to maintain shielding effectiveness. This segmentation allows both requirements to be satisfied simultaneously in different spatial locations.

Inventive Principle:
Principle #1Segmentation

3Reliability

If antenna strength is increased to improve wireless communication, then communication range is improved, but power consumption increases

Engineering Contradiction:
Improvewireless communication capabilityVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

Non-conductive portions of the housing act as intermediaries that facilitate radio wave propagation from the antenna to the outside environment. This intermediary structure improves the efficiency of radio wave transmission, allowing effective wireless communication at lower antenna power levels, thus reducing overall power consumption while maintaining communication reliability.

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 design significantly improves the efficiency of radio wave propagation, conserving power and enhancing wireless communication capabilities.

Implementation Method 1

the housing includes a reflective member and radio wave transmission regions

Methodology Applied
Scientific EffectReflection: Reflection

Implementation Method 2

using a conductive material for the reflective member

Methodology Applied
Scientific EffectConduction: Conduction (electrical)

Data Source

PatentEP4194904B1Radiation detection apparatus
Publication Date: 2026.01.28 CANON KK
  • EP4194904B1 patent drawingFigure 1A~1B
  • EP4194904B1 patent drawingFigure 1C
  • EP4194904B1 patent drawingFigure 2A~2B

AI summary

A radiation detection apparatus (100) includes a housing (111) having an incident face (111a) and a side face (111e), a reflective member (115) accommodated within the housing, the reflective member having a reflective face (115a) which reflects radio waves, and an antenna element (110a) accommodated within the housing. The side face of the housing includes a conductor region and a transmissive region (113), the transmissive region having a higher radio wave transmittance than the conductor region. The reflective member is disposed in a position at which a first radio wave (201), which proceeds directly from the antenna element toward the transmissive region, and a second radio wave (203), which reaches the reflective face from the antenna element and is reflected toward the transmissive region by the reflective face, strengthen each other.