Phased Array Radar Proximity Detection for SAR Compliance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication devices face challenges in complying with Specific Absorption Rate (SAR) radiation regulations due to the difficulty in detecting and avoiding blocking objects, which leads to inefficient power distribution and potential radiation into humans or objects, especially in high-density deployment scenarios.
Innovation Solution
The implementation of phased array antenna systems with integrated short-range radar technology to detect blocking objects and dynamically adjust the radiation pattern or redistribute power to unobstructed antenna modules, ensuring compliance with SAR regulations and minimizing power waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If phased array antenna systems are used to increase data rates and spectral efficiency, then wireless communication performance is improved, but the risk of radiation exposure to humans and objects increases
Solution Approach 1:
The system performs preliminary detection of blocking objects using radar circuitry before transmitting communication signals. By detecting the presence and location of objects in advance, the system can pre-adjust the radiation pattern to avoid directing energy toward detected objects, thereby preventing radiation exposure before it occurs.
Solution Approach 2:
The system continuously monitors the environment using radar and uses this feedback information to dynamically adjust the radiation pattern of the phased array antenna. The control circuitry receives real-time data about blocking objects and modifies the phase and amplitude of signals across antenna elements accordingly, creating a closed-loop system that adapts to changing conditions.
2Reliability
If radar circuitry is integrated into phased array antenna modules for proximity detection, then compliance with SAR regulations is achieved, but device complexity increases
Solution Approach 1:
The patent combines radar circuitry with phased array antenna modules into an integrated system. The radar transmit circuitry, radar receive circuitry, and communication circuitry share common hardware resources including antenna elements, amplifiers, and signal processing components. This merging reduces the overall device complexity compared to having separate radar and communication systems.
Solution Approach 2:
The phased array antenna modules serve multiple functions: they act as both communication antennas and radar antennas. The same antenna elements are used for both transmitting/receiving communication signals and transmitting/receiving radar signals for proximity detection. This multi-functionality eliminates the need for dedicated separate hardware, thereby reducing device complexity.
3Object-affected harmful factors
If power is redistributed to unobstructed antenna modules when blocking objects are detected, then radiation exposure is reduced, but power distribution efficiency becomes more difficult to manage
Solution Approach 1:
The system dynamically adjusts power distribution across antenna modules based on real-time detection of blocking objects. The control circuitry continuously monitors radar return signals and modifies the amplitude and phase of signals to each antenna element accordingly. This dynamic adaptation allows the system to redirect power away from blocked directions and concentrate it in unobstructed directions, optimizing both safety and efficiency.
Solution Approach 2:
The system changes the parameters of power distribution (amplitude, phase, and directionality) based on the detected environment. When blocking objects are detected, the control circuitry adjusts the radiation pattern parameters to minimize energy directed toward objects while maintaining communication quality in safe directions. This parameter adaptation simplifies the power distribution management by using standardized phased array control techniques.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces radiation exposure to humans and objects by dynamically adjusting the radiation pattern based on proximity detection, ensuring compliance with regulatory limits and enhancing power efficiency in wireless communication systems.
Implementation Method 1
a phased array antenna is used to radiate signals for communication
Implementation Method 2
detect a return signal scattered from a blocking object
Data Source
AI summary
Embodiments relate to systems methods and computer readable media to enable a wireless communication device are described. In one embodiment a wireless communication device is configured for phased array communications. The wireless communication device comprises radar circuitry to detect objects that scatter a transmit radiated signal from the wireless communication device. Control circuitry is used to adjust the transmit radiated power of the phased array communications based on information provided by the radar circuitry.