Loop Antenna Array for Linear Communication Boundary
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Solution Overview
Problem
Electric field communication systems face challenges in forming a stable and reliable limited-area radio system due to the variability of electric field distribution influenced by installation environment and user posture, making it difficult to achieve a linear and clear communication area boundary.
Innovation Solution
A loop antenna array with loop antennas that have currents flowing in opposite directions, forming a magnetic field with a sharper attenuation rate and a linear communication area boundary, utilizing low-frequency magnetic fields to reduce interaction with the human body and environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric field communication is used to create limited-area radio, then communication coverage can be established, but the communication area boundary becomes unclear and unstable due to environmental factors and user posture variations
Solution Approach 1:
The patent changes the fundamental parameter of the communication medium from electric field to magnetic field. By using magnetic field generated by loop antennas, the system achieves a more stable and predictable communication area boundary that is less sensitive to environmental factors and user posture, directly resolving the boundary clarity and stability issues
Solution Approach 2:
The patent substitutes the electric field-based communication mechanism with a magnetic field-based mechanism. This substitution replaces the problematic electric field distribution (which is easily disturbed by conductors and dielectrics) with a magnetic field that provides sharper attenuation and clearer spatial boundaries, thereby improving reliability and boundary definition
2Adaptability or versatility
If electric field is used as communication medium, then communication can be established, but the field distribution is strongly affected by surrounding conductors and dielectrics
Solution Approach 1:
The patent changes the communication medium parameter from electric field to magnetic field. Magnetic fields are inherently less affected by surrounding conductors and dielectrics compared to electric fields, thereby reducing environmental interference while maintaining communication capability across the intended area
Solution Approach 2:
The patent substitutes electric field communication with magnetic field communication using loop antennas. This substitution eliminates the strong interaction between electric fields and surrounding materials (conductors and dielectrics), significantly reducing environmental interference and improving signal stability
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
The loop antenna array effectively creates a linear and clear communication area boundary, enhancing the reliability of limited-area radio systems by using a magnetic field with a higher attenuation rate compared to single-loop antennas, ensuring stable communication across intended positions.
Implementation Method 1
loop antennas through which currents flow in opposite directions from each other, a linear and clear communication area boundary can be formed
Data Source
Figure 1~2
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AI summary
A loop antenna array that can form a linear and clear communication area boundary is provided. The loop antenna array includes two loop antennas 1 and 2. Currents flow through the loop antennas 1 and 2 in opposite directions from each other. In other words, viewing in a direction passing through each of the loop antennas 1 and 2, at a timing when a positive voltage is applied to a signal terminal of an alternating-current source E, a clockwise current flows through the loop antenna 1 while a counterclockwise current flows through the loop antenna 2. Conversely, at a timing when a negative voltage is applied to the signal terminal of the alternating-current source E, a counterclockwise current flows through the loop antenna 1 while a clockwise current flows through the loop antenna 2.