Multi-Antenna Control for Simultaneous Combined SAR Reduction
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Solution Overview
Problem
Existing wireless communication devices face challenges in managing electromagnetic wave specific absorption rate (SAR) when multiple antennas operate simultaneously, often exceeding safety standards due to superimposed radiation fields, leading to potential health risks.
Innovation Solution
An antenna control method and system that monitors network residence states and signal strengths to identify a target antenna combination that meets predetermined SAR standards, switching antennas as needed to ensure compliance with safety standards while maintaining communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas operate simultaneously to enhance communication performance, then communication quality is improved, but the combined SAR exceeds safety standards
Solution Approach 1:
The patent implements dynamic antenna selection and switching based on real-time SAR monitoring. The system dynamically adjusts which antennas are active depending on the measured SAR values, transitioning from a static all-antennas-active configuration to a dynamic selective activation model that adapts to safety constraints while maintaining communication performance.
Solution Approach 2:
The patent changes the operational parameters of the antenna system by adjusting power levels, activation states, and selection criteria based on measured SAR values. When SAR exceeds thresholds, the system modifies transmission parameters such as reducing power or deactivating specific antennas to bring SAR within safe limits while maintaining acceptable communication quality.
2Object-affected harmful factors
If antenna selection is optimized to reduce combined SAR, then safety compliance is improved, but communication performance may deteriorate
Solution Approach 1:
The patent implements a closed-loop feedback mechanism where SAR values are continuously monitored and fed back to the control system. Based on this feedback, the system adjusts antenna selection and power settings to maintain SAR compliance while optimizing communication performance. The feedback loop enables real-time adaptation to ensure both safety and performance requirements are met.
Solution Approach 2:
The patent performs preliminary SAR measurements and predictions before full-time communication begins. By pre-assessing which antenna combinations are safe to use, the system prepares optimal transmission configurations in advance, avoiding the need to compromise communication performance during actual use while ensuring SAR compliance is maintained throughout operation.
Data Source
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AI summary
An antenna control method and system (700), an electronic device (110), and a computer-readable storage medium. The method comprises: obtaining, when an electronic device (110) radiates a first antenna signal and a second antenna signal simultaneously, a combined specific absorption rate of a first antenna and a second antenna that are currently in an operating state; if the combined specific absorption rate does not meet a preset condition, invoking a target antenna combination comprising a first target antenna and a second target antenna; and controlling the first target antenna and the second target antenna to be in an operating state, so that the first target antenna and the second target antenna radiate antenna signals simultaneously. Therefore, the combined specific absorption rate of a plurality of antennas during simultaneous operation can be reduced.