Underground Antenna Height Adjustment for EMF-Compliant Coverage
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Solution Overview
Problem
Conventional manhole type antennas struggle to balance communication area expansion with radio wave protection guidelines due to close proximity of human bodies, often exceeding safe electromagnetic field strength limits.
Innovation Solution
An underground embedded antenna apparatus with adjustable antenna angle and height mechanisms, allowing for precise adjustment of antenna positions to comply with radio wave protection guidelines while optimizing communication distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If electric field strength of radio waves is strengthened to widen communication area, then communication distance is extended, but radio wave protection guidelines are not satisfied due to close proximity of human body to antenna element
Solution Approach 1:
The patent transitions the antenna installation from ground level to underground embedded position, utilizing the vertical dimension to increase separation distance between the antenna and human bodies. This spatial repositioning in the depth dimension allows electromagnetic field strength to decrease with distance while maintaining communication effectiveness through optimized antenna orientation and height adjustment mechanisms.
Solution Approach 2:
The patent incorporates adjustable mechanisms that allow dynamic modification of antenna parameters including height adjustment to change vertical positioning, angle adjustment to optimize radiation patterns, and directional orientation. These dynamic adjustments enable optimization of both communication performance and electromagnetic field exposure levels based on installation environment and regulatory requirements.
Data Source
Figure 1
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AI summary
A configuration is adopted in which an antenna apparatus of an underground embedded type to be disposed below a cover includes an antenna element and installation base where the antenna element is installed and which includes a height adjustment mechanism for adjusting a distance from the antenna element up to the cover.