Plastic-Metal Support Plate for Mobile Antenna Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The radiation performance of dual-antenna mobile communication terminals is hindered by the metal support plate, which is sensitive to ground conditions and reduces antenna efficiency due to its proximity to the antenna's radio wave transmission area.
Innovation Solution
A support plate with one end made of plastic or featuring an empty space is positioned adjacent to the antenna's radio coverage area, improving radiation performance by reducing interference and enhancing antenna efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the support plate is made of metal to support the sub-body, then the structural strength is improved, but the radiation performance of the antenna is reduced due to ground effect and proximity to the radio wave transmission area
Solution Approach 1:
The support plate is divided into two distinct regions: a metal region for structural support and a plastic region for radio wave transmission. This segmentation allows each region to fulfill its specific function without interfering with the other, resolving the contradiction between structural strength and radiation performance
Solution Approach 2:
Different materials with different properties are used in different locations of the support plate. The metal portion provides strength where needed for structural support, while the plastic portion provides radio wave transparency in the area adjacent to the antenna, allowing local optimization of both structural and electromagnetic properties
2Volume of moving object
If the support plate is positioned close to the antenna to support the sub-body structure, then the device compactness is improved, but the antenna efficiency is reduced due to interference with the radio coverage area
Solution Approach 1:
The support plate incorporates a plastic region specifically in the area adjacent to the antenna's radio coverage area. This local material property change allows the plate to be positioned close to the antenna for compactness while the plastic material does not interfere with radio wave transmission, maintaining antenna efficiency
3Ease of manufacture
If the support plate is made entirely of metal to maximize structural support, then the manufacturing simplicity is improved, but the power efficiency of the antenna is reduced due to ground condition sensitivity
Solution Approach 1:
The support plate uses a composite structure combining metal and plastic materials in a single component. This allows the plate to maintain structural support functionality while the plastic portion reduces ground effect and improves power efficiency. The composite material approach can be implemented through various manufacturing techniques such as injection molding with inserts or co-molding
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 solution increases the power and bit error rate (BER) of the antenna, leading to improved power efficiency and radio receive sensitivity, as demonstrated by comparative data tables.
Implementation Method 1
one end of the support plate installed on the mobile communication terminal is partly made of plastic or is partly provided with an empty space, and is disposed adjacent to the radio coverage area of an antenna installed on one end of a main body of the mobile communication terminal, thereby improving radiation performance of the antenna
Data Source
AI summary
A support plate includes a plate body, which has a shape of a flat plate with predetermined width and length and made of metal, and a radio coverage area member, which is provided at one of opposite ends of the plate body so as to be located adjacent to a radio coverage area of an antenna and made of plastic. Further, a mobile communication terminal has the support plate that supports a mobile communication terminal body on which at least one antenna is installed and transmits and receives radio waves through the antenna.