Middle Frame Antenna Layout to Reduce Display Coupling Noise
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Solution Overview
Problem
High-frequency electromagnetic waves generated by high-speed electronic components in electronic devices cause coupling with antennas, leading to interference and degradation of antenna performance.
Innovation Solution
The electronic device incorporates a connection hole in a specific region of the middle frame, within a range of 1/4 to 3/4 wavelength from the antenna's reference point, to reduce coupling between high-frequency noise and the antenna, optimizing performance by minimizing electromagnetic field interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection structure passes through middle frame at arbitrary position, then electrical connection between circuit board and display module is achieved, but coupling between high-frequency noise and antenna occurs causing interference
Solution Approach 1:
The patent applies local quality by identifying specific regions on the middle frame with different electromagnetic field characteristics. The connection hole is strategically positioned in a region where the electromagnetic field strength is weak (1/4 to 3/4 wavelength from the antenna reference point), creating a localized favorable environment for reducing coupling while maintaining electrical connectivity. This resolves the contradiction by making the connection structure's position selective rather than arbitrary.
Solution Approach 2:
The middle frame serves as an intermediary element between the antenna and the connection structure. By carefully designing the position of the connection hole in the middle frame, it acts as a mediator that allows electrical connection while minimizing electromagnetic coupling. The middle frame's specific region acts as an intermediary zone that permits signal transmission while filtering out harmful high-frequency noise coupling.
2Ease of manufacture
If connection hole is placed in strong electromagnetic field region, then electrical connection is easier to achieve, but coupling efficiency increases causing more interference
Solution Approach 1:
The patent applies parameter changes by modifying the positional parameter of the connection hole on the middle frame. Instead of placing it at a fixed or arbitrary position, the connection hole is positioned at a specific distance (1/4 to 3/4 wavelength) from the antenna reference point. This parameter optimization reduces electromagnetic coupling while maintaining ease of manufacture, as the specified region is clearly defined and easy to locate during assembly.
3Reliability
If connection structure is positioned to avoid electromagnetic interference, then antenna performance is optimized, but manufacturing precision requirements increase
Solution Approach 1:
The patent defines a specific regional zone (1/4 to 3/4 wavelength from the antenna reference point) on the middle frame where the connection hole can be positioned. This creates a localized favorable region with reduced electromagnetic field strength, providing a margin of error for manufacturing while still achieving the goal of reduced coupling. The regional approach is more tolerant than specifying an exact point position.
Solution Approach 2:
The patent uses a range (1/4 to 3/4 wavelength) rather than a single precise point for positioning the connection hole. This partial action approach provides a buffer zone that accommodates manufacturing tolerances while still ensuring the connection hole falls within the low-coupling region. The excessive action of providing a range rather than a point improves robustness against manufacturing variations.
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
The connection hole placement in the weak electromagnetic field region effectively reduces interference, enhancing antenna efficiency and sensitivity by minimizing coupling effects.
Implementation Method 1
a weak region of an electromagnetic field emitted by the antenna is located in the first region, and the distribution of the electromagnetic field gradually strengthens and then gradually weakens
Implementation Method 2
When a frequency of a high-frequency electromagnetic wave generated by the high-speed electronic component falls within a communication frequency band of an antenna, a coupling phenomenon occurs
Data Source
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AI summary
This application provides an electronic device, and relates to the field of electronic device technologies, to solve a problem that interference is caused to a signal of an antenna due to a coupling phenomenon in an electronic product. The electronic device includes a middle frame, a display module, a circuit board, an antenna, and a connection structure. The middle frame is provided with a connection hole. The display module is located on a side of the middle frame, and is stacked with the middle frame. The circuit board is disposed on a side of the middle frame that is away from the display module. The antenna is disposed on the middle frame, the antenna includes a radiator, the radiator is provided with a feed point and a ground point, a middle point of a part that is located between the feed point and the ground point and that is on the radiator is a reference point, a region on the middle frame that is within a range from a 1/4 wavelength to a 3/4 wavelength from the reference point is a first region in a length direction of the middle frame, and the connection hole is provided in the first region. For the connection structure, an end of the connection structure is electrically connected to the circuit board, and an other end of the connection structure passes through the connection hole and is electrically connected to the display module.