5G Multi-Layer Patch Antenna for Broadband Radiation in Devices
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Solution Overview
Problem
5G antennas in electronic devices operating in the millimeter wave band face challenges with signal radiation due to the planar substrate structure, which limits bandwidth characteristics and is obstructed by display or metal regions, necessitating improved radiation performance and broadband capabilities.
Innovation Solution
The implementation of a multi-layer substrate array antenna with patch antennas, ground layers, and vias, along with parasitic patches and EBG structures, allows for beamforming and dual polarization, enabling signal radiation through non-metal regions and enhancing broadband performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a 5G antenna is printed on a planar substrate inside the electronic device, then the antenna can be integrated into the device structure, but the signal radiation is blocked by the display region or metal body
Solution Approach 1:
The patent transitions from a planar 2D substrate to a 3D multi-layer structure with alternating dielectric and conductive layers. This dimensional change allows the antenna to radiate signals in multiple directions rather than being constrained to a single plane, thereby overcoming the blocking effect of the display region or metal body while maintaining integration within the device.
Solution Approach 2:
The patent embeds the multi-layer antenna structure within the existing electronic device architecture, nesting the antenna between the display region and metal body rather than placing it on the outer surface. This nested configuration allows the antenna to operate within the device's internal space while avoiding signal blocking from external metal components.
2Speed
If an antenna operates in the millimeter wave band (e.g., 64 GHz), then high-speed communication is achieved, but broadband characteristics are limited due to the planar structure
Solution Approach 1:
The multi-layer 3D structure provides additional spatial dimensions for electromagnetic wave propagation, enabling broader bandwidth operation. The vertical stacking of dielectric and conductive layers creates multiple radiation paths and resonant modes, allowing the antenna to achieve broadband characteristics necessary for high-speed millimeter wave communication.
Solution Approach 2:
The patent employs composite material construction with alternating dielectric layers (having different permittivity values) and conductive layers. This composite structure enables impedance matching and broadband operation by controlling the electromagnetic field distribution across multiple materials with different properties, thereby achieving both high data rate and wide bandwidth.
3Reliability
If multiple array antennas are disposed in the electronic device for 5G service, then communication coverage is improved, but interference between antennas increases
Solution Approach 1:
The patent divides the antenna system into multiple independent array elements with distinct multi-layer structures. Each array element operates as a separate unit with its own feeding network, allowing for spatial separation and reduced mutual interference while maintaining overall communication coverage through coordinated operation of multiple segments.
Solution Approach 2:
The patent introduces dielectric layers as intermediary structures between adjacent antenna arrays. These dielectric layers act as isolation barriers that reduce electromagnetic coupling and interference between neighboring antennas, allowing multiple array antennas to coexist within the device without significant mutual interference.
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 improves radiation performance, achieves broadband characteristics, and allows signal transmission through non-metal regions, effectively addressing the limitations of planar substrate antennas.
Implementation Method 1
Such an antenna printed on a planar substrate radiates a signal in a direction perpendicular to the substrate
Data Source
AI summary
Provided is an electronic device comprising an antenna for 5G communication according to the present invention. The electronic device comprises an array antenna which is implemented as a multi-layer substrate inside the electronic device and includes multiple antenna elements. Each of the multiple antenna elements of the array antenna may comprise: a patch antenna disposed on a specific layer of the multi-layer substrate and including a first patch and a second patch which are spaced a predetermined distance apart from each other; and a ground layer disposed under the patch antenna and having a slot. Meanwhile, the first patch and the second patch may be connected to the ground layer through multiple vias, and the multiple vias may be arranged in the longitudinal direction of the slot while being adjacent to the slot.