Antenna Layout With Proximity Sensing Metal for Low Interference
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Solution Overview
Problem
The miniaturization of devices has reduced the available space for antennas, leading to destructive interference between proximity sensors and radiating parts, which compromises the effectiveness of the antenna due to close sensing metal proximity.
Innovation Solution
The antenna device optimizes the distance between the radiating part and the sensing metal, ensuring it is less than or equal to one thousandth of the wavelength corresponding to the operating frequency, and configures the components such that the sensing metal is electrically connected to the proximity sensor through a metal wire, reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the proximity sensor is disposed close to the antenna to save space, then the device miniaturization is achieved, but the sensing metal causes destructive interference to the antenna
Solution Approach 1:
A grounding part is introduced as an intermediary component between the sensing metal and the radiating part. The grounding part provides an alternative current path that redirects interference currents away from the radiating part, thereby reducing destructive interference while allowing the proximity sensor to be positioned close to the antenna for device miniaturization
Solution Approach 2:
The electrical connection parameters are changed by introducing a controlled impedance path through the grounding part. By adjusting the grounding part's dimensions and electrical properties, the current distribution is optimized to minimize interference with the radiating part while maintaining close proximity between the sensor and antenna
2Area of stationary object
If the sensing metal is placed close to the radiating part, then the space utilization is improved, but the antenna effectiveness is reduced due to interference
Solution Approach 1:
The grounding part serves as a mediator that electrically connects both the sensing metal and the radiating part to the grounding metal, creating a controlled electrical environment that allows close spatial arrangement while maintaining antenna effectiveness through proper current path management
3Reliability
If the proximity sensor is added to meet SAR standards, then the electromagnetic safety compliance is improved, but the antenna performance deteriorates due to interference from sensing metal
Solution Approach 1:
The grounding part acts as an intermediary that enables the proximity sensor to be integrated for SAR compliance while preventing its sensing metal from interfering with the radiating part, thus achieving both safety compliance and performance maintenance
Solution Approach 2:
The harmful interference effect is extracted and redirected through the grounding part, separating the useful proximity sensing function from the harmful interference effect, allowing the sensor to fulfill SAR requirements without degrading antenna performance
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 configuration minimizes destructive interference, maintaining the performance of the antenna device even when equipped with a proximity sensor, ensuring compliance with SAR standards by adjusting the intensity of the feeding signal in response to object proximity.
Implementation Method 1
the sensing metal sensing that an object approaches the sensing metal
Implementation Method 2
a radiating part (130), a feeding part (140)
Implementation Method 3
The radiating part (130) is electrically connected to the grounding metal (110) through the grounding part (120)
Data Source
AI summary
An antenna device and a method for configuring the same are provided. The antenna device includes a grounding metal, a grounding part, a radiating part, a feeding part, a proximity sensor, and a sensing metal. The radiating part is electrically connected to the grounding metal through the grounding part. The feeding part is coupled to the grounding metal through a feeding point. The sensing metal is electrically connected to the proximity sensor. The sensing metal is separated from the radiating part at a distance. The distance is less than or equal to one thousandth of a wavelength corresponding to an operating frequency of the antenna device.