Foldable Terminal Antenna Coupling for Stable Same-Band Operation
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Solution Overview
Problem
Foldable terminal devices face challenges in maintaining stable antenna signal performance across different modes due to changes in antenna positions, requiring multiple antennas with the same operating frequency band, which complicates arrangement and connection methods.
Innovation Solution
A foldable terminal device design where the second antenna element is coupled with the first antenna element for coupled feeding, operating in the same frequency band, using a tuning element to adjust the frequency band and avoid signal interference caused by distance changes, without direct electrical connection through a conducting wire, simplifying the structure and improving antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas with the same operating frequency band are disposed on the two relatively movable parts to ensure stable antenna use performance, then antenna signal stability is improved, but antenna arrangement and connection methods become complex
Solution Approach 1:
The patent combines two antenna elements into a single integrated antenna structure. The first antenna element is disposed on the first relatively movable part and the second antenna element is disposed on the second relatively movable part, but they are electrically connected to form a unified antenna system that operates in the same frequency band, thereby reducing the number of separate antenna components and simplifying the overall arrangement.
Solution Approach 2:
The integrated antenna structure serves multiple functions: it maintains stable signal performance across different operational modes (folded and unfolded states) while operating in a single frequency band. The antenna system adapts to different spatial configurations of the relatively movable parts without requiring separate antenna elements for each mode, achieving multi-functionality with a unified structure.
2Reliability
If multiple antennas with the same operating frequency band are disposed on the two relatively movable parts to ensure stable antenna use performance, then antenna signal stability is improved, but wiring difficulty increases
Solution Approach 1:
By merging the two antenna elements into a single electrically connected structure, the patent reduces the number of separate wiring connections required. The electrical connection between the first and second antenna elements is integrated into the design, simplifying the wiring process compared to implementing completely separate antenna systems on each relatively movable part.
3Device complexity
If the second antenna element is coupled to the first antenna element for coupled feeding without direct electrical connection, then wiring complexity is reduced, but signal interference from distance changes must be managed
Solution Approach 1:
The patent uses an electrical connection as an intermediary element that couples the first and second antenna elements. This intermediary connection allows the antenna elements to be electrically linked for coordinated feeding while maintaining physical separation on different relatively movable parts, thereby reducing wiring complexity compared to direct rigid connections while ensuring signal stability through controlled electrical coupling.
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 enhances antenna performance by maintaining signal stability across modes, simplifying the antenna arrangement, and avoiding wiring complexities, while allowing the antennas to operate effectively in the same frequency band.
Implementation Method 1
a second antenna element disposed on the second relatively movable part and that is coupled to a first antenna element disposed on the first relatively movable part for coupled feeding
Data Source
AI summary
A foldable terminal device includes a feed source, a first part, and a second part. The first part is configured with a first antenna element that is fed by the first feed source. The second part is configured with a second antenna element that is coupled to the first antenna element for coupled feeding when the foldable terminal device is folded. An operating frequency band of the second antenna element includes an operating frequency band of the first antenna element.