Antenna Unit Capacitance Sensing for Proximity Interference Reduction
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Solution Overview
Problem
Conventional communication devices face challenges in reducing interference while maintaining antenna efficiency, as external sensors for proximity detection can affect the antenna's operating frequency band and increase fabrication costs.
Innovation Solution
A communication device with an integrated antenna unit, sensing unit, and radio frequency unit that uses the antenna unit to sense capacitance values and regulate radio frequency signal energy, eliminating the need for external sensors and allowing for component integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional proximity sensor with metal receiver is added to sense human body approach, then the interference of radio communication devices can be reduced, but the antenna efficacy is affected and the operating frequency band becomes narrower
Solution Approach 1:
The antenna unit is designed to perform dual functions: transmitting radio frequency signals and sensing capacitance changes caused by human body approach. By making the antenna multi-functional, the patent eliminates the need for separate metal receivers while maintaining both communication and sensing capabilities, thereby resolving the contradiction between reducing interference and maintaining antenna efficacy
Solution Approach 2:
The antenna unit serves itself by detecting capacitance changes directly through its own structure when a human body approaches. This self-sensing capability removes the dependency on external metal sensors that would otherwise degrade antenna performance, allowing the antenna to both communicate and sense without external interference
2Object-affected harmful factors
If a conventional proximity sensor with metal receiver is added to sense human body approach, then the interference of radio communication devices can be reduced, but the fabrication cost and occupied area increase
Solution Approach 1:
The antenna unit is designed to perform dual functions: transmitting radio frequency signals and sensing capacitance changes caused by human body approach. By making the antenna multi-functional, the patent eliminates the need for separate metal receivers while maintaining both communication and sensing capabilities, thereby resolving the contradiction between reducing interference and maintaining antenna efficacy
Solution Approach 2:
The sensing function is merged with the antenna unit by utilizing the antenna's own structure for capacitance detection. This consolidation eliminates separate sensor components and their associated metal receivers, reducing both device complexity and occupied area while maintaining the ability to reduce radio frequency interference
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 interference by dynamically adjusting radio frequency signal energy based on capacitance values, enhancing antenna efficiency without additional hardware, thus reducing costs and increasing design flexibility.
Implementation Method 1
the sensing unit is configured to sense a capacitance value through the antenna unit
Data Source
AI summary
A communication device is provided. The communication device includes an antenna unit, a sensing unit and a radio frequency unit. The antenna unit is configured to transmit a radio frequency signal. The sensing unit is coupled to a ground terminal through a first capacitor. The sensing unit is configured to sense a capacitance value through the antenna unit. The radio frequency unit is configured to generate the radio frequency signal and to regulate the energy of the radio frequency signal according to the capacitance value.