Antenna Arrangement Phase Shift Orthogonality
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Solution Overview
Problem
Current radio communication systems face challenges in achieving low correlation between multiple antennas, especially at lower frequencies, which is essential for maximizing MIMO/diversity performance and data throughput, due to limited space and increased coupling between antennas in portable devices.
Innovation Solution
The introduction of a phase shift between the radiation phase patterns of associated antennas, either through design or real-time electrical tuning, allows for orthogonality between signals, enabling efficient MIMO/diversity operation even when antennas are physically close or in the same structure, by altering the electrical length and impedance of antenna components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple antennas are placed close together in portable devices, then device size is reduced, but antenna correlation increases and MIMO/diversity performance deteriorates
Solution Approach 1:
The patent applies parameter changes by electrically tuning the antenna system to modify the phase relationship between antennas. By changing the electrical length and impedance parameters through tuning circuits, the system achieves low correlation between antennas even when physically close, thereby maintaining MIMO/diversity performance in compact devices
Solution Approach 2:
The patent implements dynamics by using electrically tunable antenna elements that can adjust their electrical characteristics in real-time. This dynamic tuning capability allows the antenna system to optimize phase relationships and maintain low correlation across different operating conditions and device configurations, resolving the contradiction between compact size and performance
2Device complexity
If antennas are placed in the same structure to save space, then device complexity is reduced, but coupling between antennas increases
Solution Approach 1:
The patent introduces intermediary tuning circuits and impedance matching networks between the antenna elements. These intermediary components act as mediators that decouple the antennas electrically while allowing them to share the same physical structure, thereby reducing harmful coupling effects without increasing overall device complexity
Solution Approach 2:
The patent uses parameter changes through electrical tuning to modify the impedance and phase characteristics of antennas sharing the same structure. By dynamically adjusting electrical parameters, the system compensates for physical proximity effects and reduces coupling between antennas while maintaining a simple unified structure
Data Source
AI summary
There is provided a method, an apparatus and a computer program product, which introduces a phase shift between radiation phase patterns of associated antennas which are applicable in transmitting and/or receiving radio frequency signals simultaneously via an air interface, wherein the phase shift is introduced in order to obtain orthogonality between the associated radio frequency signals.