Multi-Antenna Slot Layout for High Isolation in Tight Spaces
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Solution Overview
Problem
The challenge of integrating multiple antennas in limited space while minimizing interference in miniaturized electronic devices, particularly in the 5G communication era, is a significant issue in antenna design.
Innovation Solution
A highly integrated multi-antenna configuration is proposed, comprising a metal ground, a radiation slot, and an excitation unit, which includes a slot excitation source and dipole antennas, with the antennas oriented at specific angles to minimize coupling and interference, allowing for dual functionality with distance sensors and spatial multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If more antennas are placed in limited space to meet 5G communication requirements, then the quantity of antennas increases, but antenna interference and coupling increase
Solution Approach 1:
The patent utilizes three-dimensional spatial arrangement by placing dipole antennas at specific angles (10-20 degrees) relative to the slot antenna plane, and positioning them at different heights above the ground plane. This vertical and angular dimensionality allows multiple antennas to coexist in limited space while maintaining isolation through spatial separation rather than just planar distance.
Solution Approach 2:
The dipole antennas are positioned asymmetrically at specific angles (10-20 degrees) relative to the slot antenna rather than symmetrically. This asymmetric positioning optimizes the isolation between antennas by exploiting the angular dependence of electromagnetic coupling, reducing interference while maximizing space utilization.
2Volume of moving object
If antenna size is reduced to achieve miniaturization, then the volume of each antenna decreases, but antenna performance and isolation deteriorate
Solution Approach 1:
The patent embeds dipole antennas within or near the slot antenna structure, creating a nested configuration where multiple antenna elements share the same general space. The dipole antennas are positioned in the vicinity of the slot antenna at specific angles, allowing compact integration while maintaining electromagnetic isolation through proper geometric arrangement.
Solution Approach 2:
By introducing vertical positioning (height above ground plane) and angular orientation (10-20 degrees relative to slot plane) as additional dimensions, the patent achieves compact antenna integration without sacrificing isolation. This multi-dimensional positioning allows small antenna volumes while maintaining performance through spatial separation in three-dimensional space.
3Device complexity
If traditional antenna configurations are used, then the design is simple, but integration density and space utilization are low
Solution Approach 1:
The slot antenna serves multiple functions: it acts as both a radiating element and a reference plane for positioning dipole antennas at specific angles. The ground plane serves as both the reference plane for angle measurement and the ground for electrical connections. This multi-functionality reduces overall structure complexity while enabling high integration density.
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 achieves high isolation between antennas, enabling efficient integration of multiple antennas in limited spaces, such as laptops, while maintaining effective performance across various frequency bands including 2G, 3G, 4G, 5G, BT, Wi-Fi, and UWB, and integrating distance sensing capabilities.
Implementation Method 1
the slot excitation source is loaded on the slot excitation components to excite the radiation slot, thereby forming a slot antenna
Implementation Method 2
the first antenna trace extends along a direction that is at an angle of between −10° and 10° with a long side of the radiation slot... achieving high isolation between the slot antenna and the first dipole antenna
Data Source
AI summary
A highly integrated multi-antenna configuration and an antenna module containing the same are provided; the highly integrated multi-antenna configuration includes: a metal ground, a radiation slot cut out of the metal ground, and an excitation unit; the excitation unit includes a slot excitation source and slot excitation components, and the slot excitation source is loaded on the slot excitation components to excite the radiation slot, thereby forming a slot antenna. A first dipole antenna is set in the radiation slot, and extends along a direction that is at an angle of between −10° and 10° with a long side of the radiation slot. A plurality of antenna configurations can also be formed based on the same slot, and the corresponding antenna traces can function as parts of a distance sensor to improve the integration of the antenna configuration.