Foldable Antenna Switching Layout for RSE Suppression
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Solution Overview
Problem
In foldable electronic devices, the coupling between densely located antennas leads to radiated spurious emission (RSE), where transmission signals are induced into unwanted receiving paths, causing interference.
Innovation Solution
The electronic device includes multiple antennas, front-end modules, and switches controlled by a processor to dynamically alter the receiving paths and impedance matching circuits, minimizing signal induction between antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antennas are densely located in foldable electronic devices, then the device can achieve compact form factor and multiple communication functions, but coupling between antennas increases causing radiated spurious emission
Solution Approach 1:
The patent implements dynamic switching of antenna connection paths using switches controlled by a processor. When an antenna transmits a signal, the system dynamically redirects receiving paths away from antennas that would experience coupling interference, and restores normal paths when transmission stops. This dynamic adaptation resolves the contradiction by allowing compact antenna placement while actively managing interference in real-time.
Solution Approach 2:
The patent introduces switches as intermediary components between antennas and receiving paths. These switches act as mediators that can redirect signal flows to avoid coupling interference between densely packed antennas. The intermediary switches enable the system to maintain compact form factor while preventing harmful RSE by controlling signal routing through intermediate switching elements.
2Productivity
If transmission signal is routed through densely packed antennas, then communication function is achieved, but signal is induced into unwanted receiving paths causing interference
Solution Approach 1:
The system dynamically adjusts receiving paths based on transmission status. When a communication signal is transmitted through an antenna, the processor controls switches to redirect receiving paths away from antennas susceptible to coupling interference. When transmission stops, the system restores normal receiving paths. This dynamic path management maintains communication functionality while eliminating signal interference in real-time.
Solution Approach 2:
The system takes preliminary anti-action by proactively redirecting receiving paths before interference can occur. When transmission is detected or anticipated, the switches preemptively reroute receiving paths away from vulnerable antennas, preventing signal induction into unwanted paths before the interference problem manifests.
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 approach effectively reduces RSE by optimizing signal routing and impedance matching, improving communication efficiency and reducing interference in foldable devices.
Implementation Method 1
The antenna used for wireless communication has a function of transmitting or receiving a radio communication signal of a particular frequency band
Implementation Method 2
Due to the coupling between antennas, a transmission signal may be induced toward an unwanted receiving path, thereby causing radiated spurious emission
Data Source
AI summary
An electronic device includes a first antenna; a second antenna; a first front-end module configured to process a signal transmitted through the first antenna or the second antenna and process a signal received through the first antenna; a second front-end module configured to process a signal received through the second antenna; a first switch configured to connect the first front-end module to one of the first antenna or a first path; a second switch configured to connect the second antenna to one of the second front-end module or the first path; and a processor configured to, based on a communication signal being transmitted through the first antenna, control the first switch and the second switch to connect the first antenna to the first front-end module and connect the second antenna to the first path.