Integrated SAR Sensing Antenna Circuit Without External Sensor Pads
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Solution Overview
Problem
The increasing number of antennas in computing devices, particularly for 5G and WLAN connectivity, requires more SAR sensing elements, which consume significant space and can degrade antenna performance due to their placement near the antennas.
Innovation Solution
The use of existing antenna parts and components to implement SAR sensor elements through an RF filter circuit, allowing for separate RF and SAR signals without the need for external SAR pads, thus optimizing space and maintaining antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional SAR sensing pads are placed near antennas for 5G and WLAN systems, then SAR sensing capability is achieved, but significant space is consumed and antenna performance degrades
Solution Approach 1:
The antenna structure is designed to serve dual functions: RF signal transmission and SAR sensing. The same antenna elements that transmit RF signals are also configured to detect SAR levels, eliminating the need for separate dedicated SAR sensing pads and thereby reducing the space required for SAR sensing functionality.
Solution Approach 2:
The patent combines the RF antenna and SAR sensing elements into a single integrated structure. The antenna elements are configured to perform both RF communication and SAR detection functions simultaneously, merging what were previously separate components into one unified system that reduces overall space consumption.
2Adaptability or versatility
If the number of antennas is increased for 5G and WLAN connectivity, then wireless communication capability is improved, but the number of required SAR sensing elements increases
Solution Approach 1:
Each antenna element in the multi-antenna system is designed to perform dual functions: RF transmission and SAR sensing. This allows the system to support multiple antennas for enhanced wireless communication capability without proportionally increasing the number of dedicated SAR sensing elements, as each antenna contributes to both functions.
Solution Approach 2:
The patent combines the RF antenna and SAR sensing elements into a single integrated structure. The antenna elements are configured to perform both RF communication and SAR detection functions simultaneously, merging what were previously separate components into one unified system.
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 eliminates the need for additional SAR pads, reduces space requirements, and improves wireless performance by separating RF and SAR signals effectively, thereby addressing the challenges posed by the increased number of antennas.
Implementation Method 1
an RF filter circuit, allowing for separate RF and SAR signals
Data Source
Figure 1~2
Figure 3A
Figure 3B~3C
AI summary
Various embodiments utilize part of an existing antenna pattern in a computing device to implement a specific absorption rate (SAR) sensor element using a radio frequency (RF) filter circuit. The integrated solutions of the present disclosure help to eliminate the external SAR sensor pad requirement and further help to improve wireless performance. The embodiments of the present disclosure may be implemented with a variety of different types of antenna (e.g., slot, metal ring/aperture, PCB, etc.). Other embodiments may be described and claimed.