Selective Antenna Power Backoff for SAR-Compliant Transmission
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Solution Overview
Problem
Existing electronic devices with multiple network types and antennas face poor transmission performance due to indiscriminate power reduction to meet SAR value requirements, leading to significant power loss and user experience degradation.
Innovation Solution
An antenna transmission power control method that monitors network types' operating states, determining a targeted power backoff value for antennas in transmission states while exempting those in idle states, ensuring SAR compliance with enhanced transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmission power of each antenna is reduced to meet SAR requirements, then electromagnetic radiation impact on human body is reduced, but transmission performance of the electronic device deteriorates
Solution Approach 1:
The patent segments the antenna system into multiple independent antennas, each with its own operating state (transmission or idle). By identifying and isolating antennas in idle states, the system can selectively apply power backoff only to transmitting antennas, thereby maintaining overall transmission performance while meeting SAR requirements.
Solution Approach 2:
The patent applies different power control strategies to different antennas based on their local operating states. Antennas in transmission state undergo power backoff, while antennas in idle state maintain normal power levels. This localized quality adjustment resolves the contradiction by ensuring SAR compliance without uniformly degrading transmission performance across all antennas.
2Object-affected harmful factors
If transmission power is reduced across all antennas, then SAR compliance is achieved, but power loss increases and user experience deteriorates
Solution Approach 1:
The patent implements partial power backoff by applying power reduction only to antennas in transmission state rather than all antennas. This partial action approach achieves SAR compliance with minimal necessary power loss, preserving energy for antennas that are not currently transmitting and thus improving overall power efficiency and user experience.
3Object-affected harmful factors
If power backoff is applied to all antennas regardless of state, then SAR value is reduced, but transmission performance of active networks deteriorates
Solution Approach 1:
The patent implements dynamic power control by continuously monitoring the operating states of multiple antennas and adjusting power backoff in real-time. Antennas transition between transmission and idle states, and the system dynamically adapts power levels accordingly. This dynamic approach ensures SAR compliance while maintaining reliable transmission performance for actively transmitting networks.
Solution Approach 2:
The patent employs feedback mechanisms by monitoring the operating states of antennas and using this information to determine appropriate power backoff values. The system receives feedback about which antennas are transmitting and adjusts power levels based on this feedback, thereby maintaining SAR compliance without degrading the transmission performance of active networks.
Data Source
AI summary
An antenna transmission power control method, an electronic device and a non-transitory storage medium are provided. The method includes: monitoring the operating state of each preset network type of a target electronic device; according to the operating state of each network type, determining a target power backoff value; and, on the basis of the target power backoff value, performing backoff processing on the transmitting power of a target antenna corresponding to a target network type.