IoT Antenna Interference Reduction via 3D Spatial Arrangement
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Solution Overview
Problem
IoT devices with multiple antennas face performance deterioration due to interference among the antennas, which affects their ability to transmit and receive location and time information effectively.
Innovation Solution
The electronic device incorporates a housing with substrates and brackets that position antennas for WiFi, GNSS/GPS, and cellular communication in a way that reduces interference by using feed points and conductive pads for capacitive coupling, minimizing overlapping areas and optimizing antenna placement to enhance signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are placed in a small-sized IoT device, then the device can support multiple communication functions (WiFi, cellular, GPS), but antenna performance deteriorates due to interference among antennas
Solution Approach 1:
The patent positions antennas in three-dimensional space with different orientations. The first antenna is disposed along a first direction, the second antenna along a second direction, and the third antenna along a third direction, where these directions are different from each other. This spatial arrangement in multiple dimensions reduces electromagnetic interference while maintaining compact device size, allowing multiple communication functions to coexist with reliable performance
Solution Approach 2:
The patent divides the antenna system into separate, independently positioned antenna elements mounted on different brackets. Each antenna (first, second, and third) is separately positioned at different locations and orientations, allowing them to function independently while minimizing mutual interference. This segmentation enables multiple communication functions without performance degradation
2Volume of moving object
If antennas are positioned closer together to reduce device size, then the device becomes more compact, but interference among antennas increases and radiation efficiency decreases
Solution Approach 1:
The patent utilizes three-dimensional spatial arrangement with antennas oriented along different directions (first, second, and third directions) to maximize separation in available space. This dimensional approach allows compact device volume while maintaining adequate electromagnetic isolation between antennas, preserving radiation efficiency despite close proximity
Solution Approach 2:
The patent employs asymmetric positioning and orientation of antennas rather than uniform distribution. Each antenna is specifically positioned and oriented to minimize interference with others while fitting within the compact device volume. The different directional arrangements create optimal electromagnetic isolation without requiring uniform spacing, enabling compact size with maintained radiation efficiency
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 improves antenna performance by reducing interference, leading to enhanced radiation efficiency and VSWR in the frequency bands for GNSS/GPS and cellular communication, resulting in better location and time information transmission.
Implementation Method 1
the first surface including a first feed point connected to the communication circuit and a first connecting member connecting the first feed point and the first antenna to each other, the second surface including a second feed point connected to the communication circuit and a second connecting member connecting the second feed point and the third antenna to each other
Data Source
AI summary
The present disclosure relates to an electronic device made in a small size for IoT. An electronic device according to various embodiments includes: a housing; and a substrate disposed in the housing, in which the substrate may include: an upper feed point disposed on a top of the substrate and connecting a communication circuit and an antenna for WiFi to each other; a lower feed point disposed on a bottom of the substrate and connecting the communication circuit and an antenna for cellular communication to each other; and a conductive pad disposed on the top of the substrate to overlap the lower feed point and connected with an antenna for a Global Navigation Satellite System (GNSS) and/or a Global Positioning System (GPS).