Mesh-Ground Flexible Antenna Package for Low-Loss Display Bending
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Solution Overview
Problem
The challenge is to enhance the mechanical reliability and signaling efficiency of antenna packages in image display devices, particularly in thin form factors, while minimizing signal loss and bending-related defects due to increased driving frequencies and reduced thickness, which existing technologies fail to adequately address.
Innovation Solution
The solution involves a flexible circuit board with a ground layer that includes a mesh structure in the bending region, combined with solid patterns, to improve bending stability and reduce signal loss, and is electrically connected to an antenna device with a radiator and transmission line, ensuring efficient signal feeding and mechanical reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the driving frequency of the antenna is increased to implement high frequency or ultra-high frequency band communication, then the communication capability is improved, but the signal loss is increased
Solution Approach 1:
The patent employs a flexible circuit board with a thin core layer to minimize the transmission path length for high-frequency signals. The flexibility allows the circuit board to be bent and positioned optimally, reducing the distance signals must travel and thereby reducing signal loss at high frequencies.
Solution Approach 2:
The patent introduces a ground layer with a mesh structure disposed on the opposite side of the core layer from the signal wiring. This creates a three-dimensional electromagnetic field configuration that improves signal confinement and reduces radiation loss, effectively managing high-frequency signals with reduced signal loss.
2Adaptability or versatility
If the circuit board is bent to connect to the driving integrated circuit chip, then the connection flexibility is improved, but damages to circuit wirings and bonding failures are caused
Solution Approach 1:
The patent uses a flexible circuit board with a thin core layer that can be bent to connect to the driving integrated circuit chip. The flexibility is achieved through the thin core layer structure, which allows bending without causing damages to circuit wirings or bonding failures.
Solution Approach 2:
The circuit board is divided into distinct regions: a bonding region for connecting to the antenna, a bending region for flexible connection to the driving integrated circuit chip, and a body region for the main circuit board. This segmentation allows the bending region to accommodate mechanical stress while protecting the bonding region and circuit wirings.
3Length of moving object
If the thickness of the image display device is decreased, then the device portability is improved, but the degree of bending of the circuit board increases
Solution Approach 1:
The patent employs a flexible circuit board with a thin core layer that can be bent to accommodate the reduced device thickness. The flexibility allows the circuit board to be positioned and connected without requiring additional space, while the mesh ground layer provides structural support to maintain stability.
Solution Approach 2:
The circuit board is constructed as a composite structure with a core layer and a ground layer with a mesh structure. This composite design provides both flexibility (allowing bending in thin devices) and stability (through the mesh ground layer that maintains structural integrity).
4Loss of energy
If the ground layer is disposed to cover the circuit wiring layer to improve signal efficiency, then the signal loss is reduced, but the device thickness increases
Solution Approach 1:
The patent disposes the ground layer on the opposite side of the core layer from the signal wiring, creating a three-dimensional electromagnetic field configuration. This allows the ground layer to effectively cover and confine the electromagnetic field without requiring additional thickness in the same plane, thereby reducing signal loss without significantly increasing 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 effectively suppresses signal loss and enhances mechanical reliability by promoting electric field generation and stability, improving the antenna's radiation properties and connection efficiency.
Implementation Method 1
This configuration effectively suppresses signal loss and enhances mechanical reliability by promoting electric field generation and stability
Data Source
AI summary
An antenna package according to an embodiment of the present disclosure includes an antenna device including an antenna unit, and a flexible circuit board electrically connected to the antenna unit. The flexible circuit board includes a core layer having a first surface and a second surface that face each other, a circuit wiring layer disposed on the first surface of the core layer and including a signal wiring electrically connected to the antenna unit, and a ground layer disposed on the second surface of the core layer to cover the circuit wiring layer in a planar view. The ground layer partially includes a mesh structure.