Small Cell Antenna RF Reflectors for Energy Efficiency
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Solution Overview
Problem
Small cell antennas waste electromagnetic energy by radiating it outside the desired radiation pattern, leading to inefficiencies in coverage, especially in urban areas where obstructions and limited bandwidth demand more targeted signal distribution.
Innovation Solution
A circular antenna element with RF reflectors positioned around its circumference, configured to reflect RF signals outward at an angle, allowing for adjustable redirection of energy towards specific target areas, thereby improving energy efficiency and coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional small cell antennas are used, then the antenna structure is simple, but electromagnetic energy is wasted by radiating outside the desired radiation pattern
Solution Approach 1:
The antenna structure is segmented into a circular antenna element and multiple discrete RF reflectors positioned around its circumference. Each reflector is an independent component that can be individually adjusted to control the radiation pattern in specific angular sectors, allowing precise energy direction without requiring complete structural redesign.
Solution Approach 2:
RF reflectors are introduced as intermediary elements between the antenna element and the propagation environment. These reflectors act as mediators that redirect electromagnetic energy toward desired areas, converting the harmful effect of omnidirectional radiation into useful targeted coverage without fundamentally changing the antenna's core structure.
2Productivity
If RF reflectors are added to redirect energy, then energy efficiency improves, but the antenna structure becomes more complex
Solution Approach 1:
The RF reflectors are designed with adjustable mounting mechanisms that allow dynamic repositioning to optimize radiation patterns for different coverage scenarios. This dynamic capability enables the antenna to adapt to varying environmental conditions and coverage requirements without requiring multiple fixed antenna structures.
Solution Approach 2:
Different portions of the circumference around the antenna element can have reflectors with different orientations, angles, and positions, creating locally optimized radiation characteristics for specific directional requirements. This allows targeted energy distribution to different areas around the small cell based on local coverage needs.
3Loss of energy
If energy is radiated in all directions, then coverage area is maximized, but energy waste increases in urban areas with obstructions
Solution Approach 1:
The radiation pattern parameters can be adjusted by changing the orientation and position of RF reflectors, allowing the antenna to adapt to different urban environments with varying obstruction patterns. This enables optimization of energy distribution based on specific coverage requirements without sacrificing overall adaptability.
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 solution effectively redirects wasted energy towards intended targets, enhancing the energy efficiency and coverage of small cell antennas, particularly in urban environments where traditional antennas may struggle with obstructions and bandwidth demands.
Implementation Method 1
Each RF reflector is configured to reflect the RF signal transmitted from the ring outwardly from the antenna at an angle with respect to the plane of the ring
Data Source
AI summary
Increased energy efficiency of a small cell antenna is provided. Electromagnetic energy radiated outside the desired radiation pattern of a small cell antenna is wasted. An antenna is provided which includes a circular set of antenna elements having a plurality of radio-frequency (RF) reflectors positioned within and around the circumference of the set of antenna elements facing substantially outward. Each RF reflector is configured to reflect the RF signal transmitted from the ring outwardly from a corresponding antenna element at an angle with respect to the plane of the circular set of antenna elements. By adjusting the angles of the reflectors, the signal may be reflected downward toward target areas that are nearer or farther from the small cell.