Switchable MIMO Antenna Structure for Isolation and Radiation Control
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Solution Overview
Problem
5G technology's Multi-input Multi-output (MIMO) antenna design affects wireless transmission capacity and communication quality due to isolation and radiation pattern issues in WWAN and WLAN applications.
Innovation Solution
An antenna structure with additional radiators that can be turned on or off based on a mode selecting signal, allowing for adjustment of the radiation pattern and increased isolation by controlling the connection paths between radiators and signal sources through switching circuits with impedance matching and filtering functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO antenna design is used for 5G technology, then wireless transmission capacity and communication quality are improved, but isolation and radiation pattern issues arise that affect performance
Solution Approach 1:
The patent implements dynamic switching between different antenna radiation patterns using switching circuits that can selectively connect different radiator configurations. This allows the antenna system to adapt its radiation pattern in real-time based on communication requirements, resolving the contradiction between maintaining high transmission capacity and ensuring reliable communication quality by dynamically optimizing isolation and radiation characteristics.
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by introducing switching circuits that can alter the connection states between radiators and signal sources. By changing the connection parameters (connected/disconnected states), the system can transform between different radiation patterns and isolation levels, thereby resolving the performance trade-off in MIMO antenna design.
2Reliability
If additional radiators are added to adjust radiation pattern and increase isolation, then communication quality is improved, but device complexity increases
Solution Approach 1:
The patent designs the antenna system where additional radiators serve multiple functions: they can be connected to different signal sources (first and second signal sources) and can form different radiation patterns when connected to different radiators. This multi-functionality allows the same additional radiator structure to provide both radiation pattern adjustment and isolation enhancement, improving communication quality without proportionally increasing device complexity.
Solution Approach 2:
The patent pre-configures multiple connection paths and switching circuits that can selectively connect additional radiators to different signal sources or radiators based on required communication modes. This preliminary arrangement of switching infrastructure enables rapid reconfiguration of the antenna system without requiring physical restructuring, thereby managing device complexity while maintaining the ability to improve communication quality through additional radiators.
Data Source
AI summary
An antenna structure includes a first signal source, a second signal source, a first radiator, a second radiator, a third radiator, a first circuit, and a second circuit. The first signal source is used to generate a first wireless signal, and the second signal source is used to generate a second wireless signal. The first radiator is coupled to the first signal source to receive the first wireless signal, and the second radiator is coupled to the second signal source to receive the second wireless signal. The first circuit has a first end coupled to the third radiator and a second end coupled to the first radiator or the first signal source. The second circuit has a first end coupled to the third radiator and a second end coupled to the second radiator or the second signal source.