RF Power Amplifier Dynamic Output Adjustment via Proximity Sensor
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Solution Overview
Problem
Existing electronic devices that transmit RF signals do not effectively adjust output power based on the proximity of an object and the shape of the device, leading to potential exposure issues and deteriorated communication performance.
Innovation Solution
An electronic device equipped with a proximity sensor, antenna, and power amplifier, which uses a power table to adjust RF signal output power based on detected proximity and device shape, allowing for dynamic power reduction tailored to specific antennas and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dynamic power reduction uniformly backs off output power values of RF signals output to multiple antennas without considering antenna types or device shape, then RF signal exposure is reduced, but communication performance deteriorates
Solution Approach 1:
The patent applies local quality by creating distinct power tables for different antenna types (first power table for first antenna, second power table for second antenna) and different device shapes. Each power table contains antenna-specific output power values tailored to its characteristics, allowing customized power adjustment for each antenna rather than uniform reduction across all antennas, thus maintaining communication performance while reducing exposure.
Solution Approach 2:
The patent implements dynamics by dynamically selecting and applying different power tables based on real-time detection of device shape and antenna type. The system transitions between static power reduction and dynamic adaptive power reduction, adjusting output power values according to the currently detected device configuration and antenna being used.
2Reliability
If antenna-specific power tables are used to adjust output power based on device shape and proximity, then communication performance is maintained, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the power adjustment system into multiple separate power tables, each dedicated to a specific antenna type and device shape combination. This segmentation allows independent optimization for each antenna without requiring complex interdependencies, as each power table operates autonomously with its own pre-calculated power values.
Solution Approach 2:
The patent implements preliminary action by pre-calculating and storing optimal power values in separate power tables for different antenna types and device shapes before runtime. During operation, the system only needs to detect the current device shape and antenna type, then directly retrieve the corresponding pre-computed power values, avoiding complex real-time calculations.
3Ease of manufacture
If uniform power reduction is applied to all antennas, then manufacturing and implementation are simple, but exposure reduction effectiveness is compromised
Solution Approach 1:
The patent applies local quality by implementing antenna-specific power adjustment through separate power tables for different antenna types and device shapes. This allows customized exposure reduction for each antenna based on its specific characteristics and the detected device configuration, rather than applying uniform reduction that may be ineffective for certain antenna types or shapes.
Data Source
AI summary
A method and electronic device are provided for adjusting an output power of an RF signal to be output to an antenna, based on a proximity of an object and a shape (or configuration) of the electronic device. The electronic device may include a proximity sensor, an antenna corresponding to the proximity sensor, a power amplifier corresponding to the antenna, and a processor configured to control the power amplifier to output a first RF signal having a first output power to the antenna, identify the antenna corresponding to the proximity sensor, based on proximity of an object being detected by the proximity sensor, identify, using a power table configured for the antenna, a second output power corresponding to a shape of the electronic device and the proximity of the object being detected, wherein the second output power is different from the first output power, and control the power amplifier to output a second RF signal having the second output power, to the antenna.