Foldable Antenna Power Allocation Under TER Exposure Limits
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Solution Overview
Problem
Electronic devices face a challenge in satisfying total exposure ratio (TER) value regulations while maintaining optimal communication performance, as reducing transmit power to comply with these regulations can degrade communication performance.
Innovation Solution
An electronic device with a first and second housing, equipped with multiple antennas and a communication processor, calculates a consumed TER value based on the housing state and allocates transmit power to one or more antennas to maintain compliance with TER regulations while optimizing communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmit power is reduced to satisfy TER value regulations, then harmful electromagnetic wave exposure is reduced, but communication performance degrades
Solution Approach 1:
The patent applies dynamics by making transmit power allocation dynamic rather than static. The communication processor continuously monitors housing states (folded, unfolded, rotated) and adjusts transmit power in real-time based on the current configuration. This allows the system to optimize communication performance for each specific housing state while ensuring TER compliance, rather than using a fixed conservative power level that would always satisfy TER but degrade performance.
Solution Approach 2:
The patent changes the parameter of transmit power based on housing state parameters. Different housing configurations (folded vs. unfolded, different rotation angles) correspond to different optimal transmit power levels. The system calculates consumed TER values for each housing state and allocates appropriate transmit power, transforming a static power allocation problem into a parameter-dependent dynamic allocation problem that optimizes both TER compliance and communication performance.
2Reliability
If transmit power is increased to maintain communication performance, then communication reliability is improved, but TER value regulations are violated
Solution Approach 1:
The system dynamically adjusts transmit power upward when housing states indicate lower electromagnetic exposure risk (e.g., unfolded configuration with greater distance between antenna and user body), thereby maintaining communication performance without violating TER regulations. The dynamic adaptation to housing states allows the system to use higher power when safe and lower power when needed for compliance.
Solution Approach 2:
The patent establishes a mapping between housing state parameters and optimal transmit power parameters. For each housing configuration, the system determines the appropriate transmit power level that maximizes communication performance while staying within TER limits. This parameter transformation allows the system to achieve high communication reliability when housing conditions permit, without causing harmful electromagnetic exposure.
3Device complexity
If fixed transmit power allocation is used to simplify power management, then device complexity is reduced, but communication performance optimization is limited
Solution Approach 1:
The patent implements dynamic power allocation based on housing state detection, allowing the system to adapt transmit power to current operational conditions. The communication processor monitors housing configuration and automatically adjusts power levels, providing performance optimization without requiring complex manual intervention or user configuration.
Solution Approach 2:
The system employs feedback mechanisms where the communication processor continuously monitors housing state and adjusts transmit power accordingly. This closed-loop control provides performance optimization while keeping the power management system relatively simple, as the feedback is automatically processed by the existing communication processor without requiring additional complex control systems.
Data Source
AI summary
An electronic device includes a first housing, a second housing connected to the first housing, a transmitter including a plurality of antennas respectively in the first housing or the second housing and the transmitter configured to control the plurality of antennas to transmit signals, and a communication processor configured to allocate transmit power of each of the plurality of antennas, the communication processor including a controller configured to calculate a consumed total exposure ratio (TER) value of each of the plurality of antennas based on a housing state between the first housing and the second housing and allocate transmit power to one or more transmit antennas from among the plurality of antennas based on the consumed TER value.