Antenna-Based Object Detection via S-Parameter Analysis
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Solution Overview
Problem
Electronic devices face challenges in recognizing adjacent objects and determining their distance without using a grip sensor, which can increase material costs and deteriorate antenna performance due to loading effects and parasitic components.
Innovation Solution
The use of a processor-controlled electronic device with a first and second antenna, along with a communication circuit and coupler, to output signals and calculate reflection and transfer coefficients based on received signals, allowing for object recognition and distance determination without a grip sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a grip sensor is used to detect adjacent objects and distance, then object recognition capability is improved, but material cost increases and antenna performance deteriorates due to loading effects and parasitic components
Solution Approach 1:
The patent extracts the object detection function from the dedicated grip sensor and relocates it to the antenna system. By measuring S parameters (reflection coefficient S11 and transfer coefficient S21) through the existing antenna structure, the system eliminates the need for separate grip sensor hardware while maintaining detection capability. This extraction resolves the contradiction by removing the harmful parasitic components associated with dedicated grip sensors.
Solution Approach 2:
The patent makes the antenna system multi-functional by enabling it to perform both its primary communication function and the secondary function of object detection and distance measurement. The same antenna structure that transmits and receives signals is also used to measure S parameters for detecting adjacent objects. This universality eliminates the need for dedicated grip sensors, reducing material costs and avoiding antenna performance deterioration from additional sensor components.
2Difficulty of detecting and measuring
If a grip sensor is used to detect adjacent objects and distance, then object recognition capability is improved, but material cost increases
Solution Approach 1:
The patent makes the antenna system multi-functional by enabling it to perform both its primary communication function and the secondary function of object detection and distance measurement. The same antenna structure that transmits and receives signals is also used to measure S parameters for detecting adjacent objects. This universality eliminates the need for dedicated grip sensors, reducing material costs and avoiding antenna performance deterioration from additional sensor components.
Solution Approach 2:
The patent extracts the object detection function from the dedicated grip sensor and relocates it to the antenna system. By measuring S parameters (reflection coefficient S11 and transfer coefficient S21) through the existing antenna structure, the system eliminates the need for separate grip sensor hardware while maintaining detection capability. This extraction resolves the contradiction by removing the harmful parasitic components associated with dedicated grip sensors.
3Ease of operation
If additional external components are added to control grip sensor operation range, then sensor control capability is improved, but device complexity increases and mounting space is reduced
Solution Approach 1:
The patent extracts the object detection function from the dedicated grip sensor and relocates it to the antenna system. By measuring S parameters (reflection coefficient S11 and transfer coefficient S21) through the existing antenna structure, the system eliminates the need for separate grip sensor hardware while maintaining detection capability. This extraction resolves the contradiction by removing the harmful parasitic components associated with dedicated grip sensors.
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 approach enables the identification of adjacent objects and provision of functions based on distance without the need for a grip sensor, reducing material costs and improving antenna performance by eliminating parasitic components.
Implementation Method 1
acquire a second signal obtained through reflection of the first signal from the first antenna
Implementation Method 2
acquire a third signal acquired through reception of the first signal output through the first antenna by the second antenna
Data Source
AI summary
The electronic device of the present invention may comprise: a first antenna and a second antenna; a communication circuit; and a processor electrically connected to the first antenna, the second antenna, and the communication circuit. The processor is configured to: control the communication circuit such that a first signal is output to the first antenna; acquire a second signal corresponding to the first signal reflected from the first antenna, and a third signal corresponding to the first signal output through the first antenna and received by the second antenna; identify a reflection coefficient at which the first signal is reflected from the first antenna, and a transmission coefficient at which the first signal is transmitted to the second antenna; and perform a designated function according to a value corresponding to a distance between the electronic device and an external object.