Foldable Terminal Antenna Layout for Reduced Closed-Frame Interference
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Solution Overview
Problem
In foldable terminal devices, the contact between middle frames can lead to degradation in antenna performance due to mutual interference, which existing technologies attempt to mitigate by symmetrical grooves but with limited success in enhancing transceiving performance and frequency band utilization.
Innovation Solution
The implementation of a foldable terminal device design where the first and second middle frames are connected through a rotary shaft, allowing independent operation of antenna modules with adjustable feed circuits to reduce interference and extend usable frequency bands by placing antenna modules on both frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antenna modules are placed on both middle frames, then usable frequency band is extended and space utilization is improved, but mutual interference between transmitting and receiving signals increases when frames are closed
Solution Approach 1:
The patent divides the antenna system into separate antenna modules on each middle frame, with each module having its own feed circuit. This segmentation allows independent control of each antenna module's feeding state, enabling the system to manage interference by selectively activating or deactivating specific modules based on their spatial relationship when the device is folded or unfolded.
Solution Approach 2:
The patent implements dynamic control of the feed circuits associated with each antenna module. The feed circuits can be adjusted in real-time based on the folding state of the device, transitioning between different feeding configurations to optimize performance. This dynamic adjustment allows the system to adapt to changing spatial relationships between antenna modules, reducing mutual interference when folded while maintaining full functionality when unfolded.
2Area of stationary object
If antenna modules are placed on both middle frames, then space utilization is improved, but device complexity increases due to multiple antenna modules and feed circuits
Solution Approach 1:
The patent designs the antenna modules and their associated feed circuits to serve multiple functions. Each antenna module can operate independently or in conjunction with the other, and the feed circuits can be configured for different feeding modes. This multi-functionality allows the same hardware components to adapt to different operational requirements, reducing the need for additional specialized components and thereby managing complexity while maximizing space utilization.
3Object-affected harmful factors
If symmetrical grooves are formed in both middle frames, then coupling impact is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces feed circuits as intermediary components between the antenna modules and the signal source. These feed circuits provide an additional degree of freedom for controlling the electromagnetic fields generated by each antenna module. By adjusting the feed circuits, the system can compensate for coupling effects caused by the grooves, thereby reducing the strictness of groove symmetry requirements while still achieving the goal of minimizing coupling impact.
Data Source
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AI summary
The present disclosure relates to a terminal device. The terminal device includes: a first middle frame; a second middle frame, connected to the first middle frame, wherein the first middle frame and the second middle frame are configured to fold or unfold through a rotary shaft; a first antenna module, disposed on the first middle frame; a second antenna module, disposed on the second middle frame, wherein when the first middle frame and the second middle frame are closed, a projection of the second antenna module on the first antenna module at least partially overlaps with the first antenna module; and the first antenna module and the second antenna module are connected to corresponding feed circuits, respectively.