Mobile Terminal Antenna Assembly With Coupling Antennas
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Solution Overview
Problem
Conventional mobile terminals face challenges in maintaining effective antenna radiation efficiency and gain due to mechanical state changes, such as sliding and folding operations, which are exacerbated by the use of metal materials and the placement of components like speakers and keypads, leading to distorted radiation patterns and reduced efficiency.
Innovation Solution
The implementation of a dual-coupling antenna system, where a main antenna is paired with first and second coupling antennas on the second body, allowing for efficient signal coupling without additional switches or signal lines, ensuring consistent bandwidth and gain across mechanical state changes without increasing the terminal's thickness or size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional single antenna is used in sliding or folding mobile terminals, then the terminal structure can be simple, but the radiation efficiency is reduced due to mechanical state changes and metal material interference
Solution Approach 1:
The antenna system is segmented into a main antenna and multiple coupling antennas, where each coupling antenna is positioned to couple with the main antenna in specific mechanical states. This segmentation allows the system to maintain radiation efficiency across different terminal configurations without requiring a completely redundant antenna system for each state.
Solution Approach 2:
The antenna system is designed to dynamically adapt to mechanical state changes through coupling between the main antenna and coupling antennas. As the terminal transitions between sliding or folding states, the coupling relationships change automatically, maintaining optimal radiation performance without requiring manual intervention or complex switching mechanisms.
2Reliability
If two antennas with switches and signal lines are used to maintain radiation efficiency, then the radiation pattern can be maintained, but the terminal thickness and size increase
Solution Approach 1:
Multiple antenna functions are merged into a single main antenna system that couples with multiple coupling antennas depending on the mechanical state. This merging eliminates the need for separate complete antenna systems for each state, reducing the overall space required while maintaining radiation efficiency across different configurations.
Solution Approach 2:
The main antenna serves multiple functions by coupling with different coupling antennas in different mechanical states. This multi-functionality allows a single antenna system to replace what would traditionally require multiple dedicated antennas, switches, and signal lines, thereby reducing terminal thickness and size.
3Strength
If metal materials are used to reinforce terminal strength in slim structures, then the terminal strength is improved, but the radiation pattern becomes distorted and antenna efficiency is reduced
Solution Approach 1:
The antenna system is designed with local quality considerations by positioning coupling antennas at specific locations where they can couple with the main antenna while minimizing interference from metal structures. The coupling antennas are strategically placed to exploit favorable electromagnetic environments in different mechanical states, compensating for the presence of metal materials.
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 solution maintains effective antenna radiation efficiency and gain across mechanical state changes, reducing the need for additional components and minimizing wear, while allowing for a slim and compact design by positioning coupling antennas strategically to couple with the main antenna during state changes.
Implementation Method 1
a first coupling antenna and second coupling antenna disposed at the second body for individually coupling to the main antenna according to a change of a mechanical state of the mobile terminal
Data Source
AI summary
An antenna assembly of a mobile terminal is provided. The antenna assembly of a mobile terminal includes: a main antenna disposed at a side of the mobile terminal; a first coupling antenna coupled to the main antenna in a first mechanical state of the mobile terminal; and a second coupling antenna coupled to the main antenna in a second mechanical state according to a mechanical operation of the mobile terminal.