Base Station Antenna Reflection Board Wideband Design
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Solution Overview
Problem
Existing base station antennas face challenges in miniaturization and wideband applications due to the limitations of reflection boards, which either have a large size for wide bandwidth or a narrow bandwidth with a small size, restricting their size reduction and multiband operations.
Innovation Solution
A reflection board design featuring a bottom board, side boards, and a step board that connects to both, allowing high-frequency and low-frequency electromagnetic waves to resonate at different locations, maintaining consistent directivity patterns across a wide bandwidth while minimizing the antenna's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a tilted flat board reflection board is used, then the operating frequency range (bandwidth) is relatively wide and the directivity pattern maintains good consistency, but the size of the base station antenna becomes relatively large
Solution Approach 1:
The reflection board is divided into multiple reflection units arranged in an array. Each reflection unit includes a first reflection surface and a second reflection surface that are not coplanar, creating segmented reflective elements that collectively provide wideband operation while maintaining a compact overall structure.
Solution Approach 2:
The reflection surfaces are arranged in three-dimensional space with specific spatial relationships. The first and second reflection surfaces are positioned at different angles and locations, utilizing spatial dimensionality to achieve wide bandwidth without increasing the overall antenna footprint.
2Volume of moving object
If a horizontal board reflection board is used, then the size of the base station antenna is relatively small, but the operating frequency range (bandwidth) is relatively narrow
Solution Approach 1:
The compact horizontal structure is enhanced by segmenting the reflection board into multiple units with different oriented reflection surfaces. This segmentation allows the small overall structure to support multiple resonance frequencies through the different orientations of individual reflection surfaces.
Solution Approach 2:
Different regions of the reflection board have different local structures with specific reflection surface orientations. Each local region contributes to different frequency responses, enabling the compact overall structure to achieve wideband operation through localized structural variations.
3Stability of the object's composition
If a tilted flat board reflection board is used, then the directivity pattern maintains good consistency across wide bandwidth, but the size of the base station antenna becomes relatively large
Solution Approach 1:
The reflection board is segmented into multiple units with carefully designed reflection surfaces that work together to maintain stable directivity patterns. The segmented structure allows for compact sizing while preserving the directivity consistency through coordinated reflection from multiple surfaces.
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 enables a compact base station antenna with a wide bandwidth, maintaining consistent directivity patterns across multiple frequency bands, thus overcoming the size and bandwidth limitations of prior designs.
Implementation Method 1
allowing high-frequency and low-frequency electromagnetic waves to resonate at different locations
Implementation Method 2
The side board is connected to the step board, and the step board is in contact with the bottom board
Data Source
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AI summary
The present utility model relates to the field of communications technologies and discloses a reflection board of a base station antenna and the base station antenna that relate to the field of communications technologies. The reflection board of the base station includes a bottom board, a side board, and a step board, where the side board includes a first side board and a second side board that are opposite to each other, the first side board and the second side board are respectively disposed on two sides of the bottom board, the side board is connected to the step board, and the step board is in contact with the bottom board.