Antenna Ground Units for Isolation in Miniaturized Devices
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Solution Overview
Problem
In miniaturized electronic devices, such as mobile and wearable devices, the close proximity of antennas leads to poor antenna isolation due to insufficient distance, resulting in signal interference and reduced transmission quality in MIMO systems.
Innovation Solution
The antenna system employs a ground plane with two antenna units and two ground units forming closed loops, where the physical lengths of the ground units match the wavelengths of the signals, providing effective grounding and decoupling to maintain isolation even at close distances between antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the distance between two antennas is reduced to achieve miniaturization, then the device size is reduced, but antenna isolation deteriorates causing mutual interference
Solution Approach 1:
The patent introduces ground units as intermediary elements between the antennas and ground plane. These ground units act as mediators that manipulate electromagnetic field distribution, creating decoupling effects that isolate antennas from each other even when positioned close together, thus resolving the contradiction between compact size and antenna isolation
Solution Approach 2:
The patent changes the electrical parameters of the grounding system by introducing ground units with specific impedance characteristics. By adjusting the impedance of ground units and their connection points, the electromagnetic coupling between antennas is modified, enabling good isolation performance in compact configurations
2Reliability
If the distance between two antennas is increased to improve antenna isolation, then mutual interference is reduced, but the device size increases
Solution Approach 1:
Ground units serve as intermediary structures that actively manage electromagnetic field interactions. By positioning these ground units strategically between antennas and the ground plane, the system achieves effective field decoupling without requiring large physical separation between antenna elements
3Volume of moving object
If conventional grounding is used in compact designs, then device miniaturization is achieved, but signal interference increases due to poor antenna isolation
Solution Approach 1:
The patent modifies the electrical parameters of the grounding system by introducing ground units with specific impedance values and connection configurations. This parameter optimization changes the electromagnetic boundary conditions, reducing harmful coupling effects while maintaining compact dimensions
Solution Approach 2:
Ground units are introduced as intermediary elements that actively manage electromagnetic field distribution. These units create decoupling effects that prevent signal interference between antennas, allowing compact designs to maintain good isolation performance
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 ensures good antenna isolation and transmission quality by preventing mutual interference between antennas, while allowing for compact designs in electronic devices, thereby reducing manufacturing costs.
Implementation Method 1
a closed end of the first ground unit is connected to the first side, and another closed end of the first ground unit is connected to the second side, to jointly form a first closed loop with the ground plane, and a physical length of the first ground unit matches the first high-frequency signal and the second high-frequency signal to provide grounding of the first high-frequency signal and the second high-frequency signal
Implementation Method 2
a physical length of the first ground unit matches the first high-frequency signal and the second high-frequency signal to provide grounding of the first high-frequency signal and the second high-frequency signal
Data Source
AI summary
An antenna system is provided, including a ground plane, a first antenna unit, a second antenna unit, a first ground unit and a second ground unit. The ground plane includes a first side and a second side. The first ground unit and the ground plane jointly form a first closed loop, and a length of the first ground unit matches the first high-frequency signal and the second high-frequency signal to provide grounding of the high-frequency signals. The second ground unit forms a second closed loop and is connected to the first ground unit, and a length of the second ground unit is greater than the length of the first ground unit. A sum of the length of the second ground unit and the length of the first ground unit matches the first low-frequency signal and the second low-frequency signal, to jointly provide the grounding of the low-frequency signals.