Frame Antenna Mutual-Capacitive SAR Sensing in Mobile Devices
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Solution Overview
Problem
Existing mobile devices require additional antenna units or conductors for SAR sensing, which occupy internal space, interfere with communication signals, and hinder miniaturization.
Innovation Solution
A mobile device design that utilizes a touch screen with a first sensing module and a frame antenna with at least one second sensing module to form mutual-capacitive sensing loops, achieving SAR sensing without additional antenna components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional antenna units are added for SAR sensing, then SAR sensing function is achieved, but device space is occupied and communication signals are interfered with
Solution Approach 1:
The patent merges the SAR sensing function with the existing frame antenna structure by integrating sensing modules into the antenna elements. The frame antenna serves dual purposes: communication signal transmission and SAR proximity sensing, eliminating the need for separate sensing antennas and reducing overall device complexity
Solution Approach 2:
The frame antenna is designed to perform multiple functions simultaneously: it acts as both a communication antenna for signal transmission and reception, and as a SAR sensing antenna for detecting human proximity. This multi-functionality resolves the contradiction by using existing components for dual purposes rather than adding separate dedicated components
2Reliability
If additional antenna units are added for SAR sensing, then SAR sensing function is achieved, but miniaturization is hindered
Solution Approach 1:
The sensing functionality is merged into the existing frame antenna structure, utilizing the same physical space for both communication and sensing functions. This integration approach enables SAR sensing without increasing device volume, supporting miniaturization goals
3Reliability
If additional antenna units are added for SAR sensing, then SAR sensing function is achieved, but cost increases
Solution Approach 1:
The patent combines SAR sensing capabilities with the existing frame antenna, eliminating the need to manufacture and assemble separate sensing antenna components. This reduces manufacturing complexity and cost while maintaining SAR sensing functionality
Solution Approach 2:
The frame antenna serves itself by performing both communication and sensing functions, eliminating the need for additional dedicated sensing components. This self-service approach reduces component count, simplifies assembly, and lowers manufacturing costs
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 enables SAR sensing without the need for additional antenna components, promoting miniaturization and cost savings by using the frame antenna to replace communication antennas.
Implementation Method 1
the first sensing module and the at least one second sensing module form at least one mutual-capacitive sensing loop to sense whether an object approaches or touches the touch screen and the frame antenna
Data Source
AI summary
A mobile device comprises a touch screen and a frame antenna. The touch screen have a first sensing module. The frame antenna is disposed around the periphery of the touch screen, and the frame antenna further has at least one second sensing module, wherein the first sensing module and the at least one second sensing module form at least one mutual-capacitive sensing loop to sense whether an object approaches or touches the touch screen and the frame antenna.