Antenna Proximity Sensing for Dynamic SAR Power Control

The patent segments the antenna system into multiple independent antenna radiators, each with its own DC path to ground or feeding terminal. This allows individual control of each antenna's SAR contribution while maintaining overall communication performance through coordinated operation of multiple antennas.

The patent implements a feedback mechanism where capacitance signals from sensing bodies are continuously monitored, and transmit power is dynamically adjusted based on detected changes in capacitance values. This closed-loop control enables real-time SAR management while preserving communication quality.

The patent employs dynamic power adjustment where transmit power is continuously adapted based on real-time capacitance sensing. When the user is far from the antenna, full power is transmitted for optimal communication. When the user approaches, power is reduced to maintain SAR compliance, creating a dynamic balance between safety and performance.

The patent changes the transmit power parameter dynamically based on detected capacitance values. By monitoring capacitance changes that indicate user proximity, the system adjusts power levels to maintain SAR compliance while minimizing impact on communication performance through selective power adjustment.

The patent uses periodic capacitance sensing and power adjustment based on detected changes rather than continuous adjustment. The system monitors capacitance signals and only adjusts power when changes exceed thresholds, reducing unnecessary power consumption while maintaining SAR compliance through event-driven control.

The sensing body serves dual purposes: it detects user proximity for SAR control and simultaneously provides capacitance signals that trigger power adjustment only when needed. This self-service mechanism reduces energy consumption by avoiding continuous active sensing and adjustment, relying instead on passive capacitance detection.