Underground Antenna Height Adjustment for Safe Ground-Level 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 height and angle mechanisms to optimize the distance between antenna elements and the ground surface, ensuring compliance with radio wave protection guidelines while extending communication distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the electric field strength of radio waves is strengthened to widen communication area, then communication area is improved, but radio wave protection guidelines are not satisfied
Solution Approach 1:
The patent implements adjustable height mechanisms that allow the antenna elements to dynamically change their position relative to the ground surface. This enables the system to adapt the distance between antenna elements and the ground, thereby controlling electromagnetic field strength at ground level while maintaining communication performance
Solution Approach 2:
The patent changes the physical parameter of antenna height above ground to control electromagnetic field distribution. By adjusting the height parameter, the system can reduce field strength at ground level (satisfying protection guidelines) while maintaining adequate communication area through optimized spatial positioning
2Object-affected harmful factors
If the distance between antenna element and ground surface is reduced to satisfy radio wave protection guidelines, then radio wave protection is improved, but communication area is reduced
Solution Approach 1:
The adjustable height mechanism allows dynamic positioning of antenna elements, enabling optimization of the distance to ground surface. This dynamic adjustment capability permits the system to find optimal positions that simultaneously satisfy protection guidelines and maintain adequate communication coverage
Solution Approach 2:
The patent utilizes the vertical dimension (height adjustment) as an additional degree of freedom to resolve the horizontal trade-off between protection and coverage. By operating in three-dimensional space rather than fixed two-dimensional positioning, the system can achieve both protection and communication goals
Data Source
AI summary
An antenna apparatus is disclosed including an antenna element; an installation base being a base where the antenna element is installed; a container including an upper surface that opens and housing the antenna element and the installation base, the upper surface being a surface closest to a ground surface when the container is installed in a ground; and a cover being formed of FRP (Fiber-Reinforced Plastics) and covering an opening of the container, wherein the installation base includes a height adjustment mechanism that adjusts a distance from the antenna element to the cover. In other aspects, a radio base station is also disclosed.