Wireless Device Shell Low Reflection Structure
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Solution Overview
Problem
The challenge in millimeter-wave (mmWave) communication applications is the significant energy loss and electromagnetic interference caused by the shell due to impedance mismatching and reflection phenomena, which degrade the radiation efficiency and lead to mechanical strength issues when the shell thickness is adjusted to minimize reflection.
Innovation Solution
A wireless device with a shell featuring a low reflection structure, comprising periodically arranged slots that adjust the equivalent dielectric constant and reduce reflection loss, allowing the electromagnetic wave to transmit effectively without altering the shell thickness, thereby enhancing radiation efficiency and mechanical integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the shell thickness is reduced to minimize reflection and improve radiation efficiency, then the reflection loss is reduced, but the mechanical strength of the shell deteriorates
Solution Approach 1:
The patent introduces a low reflection structure that changes the electromagnetic parameters (equivalent dielectric constant) of the shell without altering its physical thickness. This allows the shell to maintain its original mechanical strength while achieving reduced reflection loss through electromagnetic parameter optimization rather than geometric modification
Solution Approach 2:
The low reflection structure is formed by combining multiple materials with different dielectric constants in specific proportions and arrangements. This composite structure creates an equivalent dielectric constant that optimizes electromagnetic wave transmission while maintaining the shell's structural integrity and mechanical strength
2Reliability
If the shell thickness is adjusted to minimize reflection, then the radiation efficiency is improved, but the impedance mismatching and reflection phenomena cause electromagnetic interference
Solution Approach 1:
The low reflection structure optimizes the equivalent dielectric constant of the shell to match the impedance of electromagnetic waves, minimizing reflection and transmission losses. This parameter optimization reduces both reflection loss and electromagnetic interference simultaneously, improving radiation efficiency without generating harmful interference
Solution Approach 2:
The patent converts the potentially harmful reflection phenomenon into a beneficial effect by designing the low reflection structure to control and direct reflected waves. The structure transforms random reflections that cause interference into controlled wave patterns that enhance radiation efficiency and reduce electromagnetic interference
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
The low reflection structure effectively reduces reflection loss and enhances peak gain by up to 3 dB, particularly in large angle scanning scenarios, while maintaining the mechanical strength of the shell, thus improving the overall performance of mmWave array antennas.
Implementation Method 1
an impedance mismatching may likely occur between interfaces and cause a phenomenon of partial transmission and partial reflection
Implementation Method 2
a reflection phenomenon occurs in both of the scenarios in the presence of the shell (an insulation medium)
Implementation Method 3
the low reflection structure includes a plurality of slots arranged periodically... adjust the equivalent dielectric constant
Data Source
AI summary
A wireless device includes a shell and an array antenna. The shell is configured with a low reflection structure. The array antenna disposed inside the shell, and the low reflection structure is located within a radiation range of the array antenna after beam scanning. The low reflection structure includes a plurality of slots arranged periodically.