Frame Antenna Layout With Stacked PCB Clearance for Mobile Phones
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Solution Overview
Problem
As electronic devices, such as mobile phones, integrate more components, there is less space for antennas, leading to poor performance due to limited antenna clearance area and increased frequency bands.
Innovation Solution
The electronic device incorporates a circuit board assembly with a first conductive member, such as an elastic piece, that is fixed to a protruding extension portion and in elastic contact with the radiator, increasing the antenna clearance area and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If more electronic components are integrated into the mobile phone to realize more diverse functions, then the functionality of the mobile phone is improved, but the space for arranging antennas is reduced
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional stacked arrangement by introducing an elevating board that vertically separates the circuit board into multiple layers. This dimensional change allows antenna components to be positioned in the thickness direction, effectively utilizing the Z-axis space that would otherwise be wasted, thereby increasing antenna clearance area without expanding the device's footprint.
Solution Approach 2:
The patent implements a nested structure where the elevating board is positioned between the first board and the second board, creating a layered configuration. The first extension portion protrudes from the elevating board and hosts the first conductive member, which is nested within the overall circuit board assembly. This nesting approach allows multiple functional layers to coexist in a compact volume, maximizing space utilization.
2Adaptability or versatility
If the number of antennas is increased to support more 5G frequency bands, then the communication capability is improved, but the antenna clearance area is reduced
Solution Approach 1:
The patent segments the antenna system by providing multiple independent conductive members (first conductive member, second conductive member, third conductive member) that can operate at different frequency bands. Each conductive member is independently mounted on the circuit board assembly, allowing them to be optimally positioned without interfering with each other, thereby enabling support for multiple 5G frequency bands with adequate clearance for each antenna element.
Solution Approach 2:
By utilizing the vertical dimension through the elevating board structure, the patent can accommodate multiple antenna elements in the thickness direction rather than forcing them to compete for horizontal space. This vertical stacking approach increases the effective antenna clearance area available for each frequency band while supporting a greater total number of antennas.
3Length of moving object
If the first conductive member is fixed close to the display screen to save space, then the device thickness is reduced, but the antenna performance deteriorates
Solution Approach 1:
The patent resolves this contradiction by using the vertical dimension to separate the first conductive member from the display screen. The elevating board raises the first board (and consequently the first conductive member) above the display screen plane, creating sufficient clearance for optimal antenna performance while maintaining a compact overall device profile through the layered stacked architecture.
Solution Approach 2:
The elevating board acts as an intermediary structure that mediates between the display screen and the first conductive member. It provides the necessary vertical separation to ensure adequate antenna clearance and performance, while its compact design ensures that this separation does not significantly increase the overall device thickness.
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 configuration enhances the antenna's ability to transmit and receive electromagnetic waves by increasing the clearance area and stabilizing the connection between the conductive member and the radiator, resulting in better antenna performance.
Implementation Method 1
The first conductive member is in elastic contact with the radiator
Data Source
AI summary
The electronic device includes a frame, a screen, and a circuit board assembly. A part of the frame forms a radiator of an antenna, or the radiator of the antenna is fixed on an inner side of the frame. The circuit board assembly is located on the inner side of the frame. The circuit board assembly includes a first conductive member, and a first board, an elevating board, and a second board sequentially stacked. The first board is located on one side of the second board away from the screen. The first board includes a first main body portion and a first extension portion connected to the first main body portion. The first main body portion is fixedly connected to the elevating board. The first extension portion protrudes relative to the elevating board and the second board, and is disposed close to the radiator.