Antenna Switch Module for Electronic Device Frequency Band Adjustment
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Solution Overview
Problem
As electronic devices with large screens develop, the reduced forehead area affects the main antenna's performance due to smaller clearance areas and material influences, existing antennas like LDS and FPC are compromised.
Innovation Solution
The implementation of a switch module configuration within the electronic device, comprising first and second switch modules, inductors, and capacitors, allows for adjustable switch states to cover required frequency bands, forming inverted F and parasitic antennas, independent of the casing material and size, thereby enhancing antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large-area LDS antenna or FPC antenna is used, then the antenna coverage area is sufficient, but the forehead area of the electronic device must be large
Solution Approach 1:
The antenna system is divided into multiple independent antenna elements (first antenna element, second antenna element, third antenna element, fourth antenna element) that can be selectively activated. This segmentation allows the antenna function to be distributed across different locations and materials, eliminating the need for a single large continuous antenna area.
Solution Approach 2:
The patent employs switch modules that can dynamically change the connection states of different antenna elements based on operating frequency requirements. The switches can connect or disconnect different antenna elements and parasitic elements, allowing the antenna system to adaptively reconfigure its effective area and impedance characteristics for different frequency bands.
2Area of stationary object
If the main antenna pattern becomes small, then the forehead area is reduced, but the antenna performance is easily affected by the casing material
Solution Approach 1:
The antenna system is designed to work with different casing materials (metal or ceramic) by providing multiple antenna elements that can be selectively activated. The system can adapt to different material properties by switching between different antenna configurations, making the antenna performance reliable regardless of the casing material used.
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by switching between different antenna elements and parasitic elements. By adjusting which elements are active and how they are connected, the system can optimize its impedance and radiation characteristics to compensate for the effects of different casing materials.
3Adaptability or versatility
If switch modules with multiple components are added, then frequency band coverage is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple antenna elements and parasitic elements into a unified antenna system controlled by switch modules. The switches integrate the control of multiple antenna elements and reactive components, allowing frequency band adjustment through a coordinated switching mechanism rather than separate controls for each component.
Data Source
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AI summary
An electronic device includes a feeding point 16, a first switch module 21, a second switch module 31, a first connecting portion 17, a second connecting portion 18and a third connecting portion 19. The feeding point 16 is connected to an end of a first sub-bezel 11 through the first connecting portion 17. A first end of the first switch module 21 is connected to a second partition 14 through the second connecting portion 18, and a second end of the first switch module 21 is grounded. A connection position between the second connecting portion 18 and the second partition 14 is close to the feeding point 16. A first end of the second switch module 31 is connected to the first sub-bezel 11 through the third connecting portion 19, and a second end of the second switch module 31 is grounded.