Antenna System with Segmented Boards for 5G Radiation and Thermal Management
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Solution Overview
Problem
Existing antenna systems for 5G micro-base stations face challenges in achieving high radiation efficiency and heat dissipation due to medium loss and narrow bandwidth, particularly in millimeter wave bands, which affects their performance in supporting multiple frequency bands and dual polarization.
Innovation Solution
The antenna system comprises a holder with interconnected boards surrounding a space, featuring slots between them, and antenna bodies with feeding, conjoining, and ground portions connected to these boards, enhancing radiation and heat dissipation efficiency by improving impedance matching and reducing reflection loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If panel antenna is used for dual frequency and dual polarization, then polarization diversity requirement is met, but radiation efficiency deteriorates to 50%-60% due to medium loss
Solution Approach 1:
The antenna system is divided into multiple independent antenna elements (first antenna body and second antenna body) with distinct feeding portions, conjoining portions, and ground portions. Each antenna body is independently connected to different boards, allowing separate optimization of radiation characteristics for different polarization directions while reducing mutual coupling effects that cause energy loss.
Solution Approach 2:
The patent transitions from a planar panel antenna structure to a three-dimensional configuration where antenna bodies extend in multiple dimensions with conjoining portions connecting feeding and ground portions through space. This spatial arrangement reduces medium loss by minimizing the path through lossy substrates while maintaining dual polarization capabilities.
2Productivity
If panel antenna is used, then antenna array is formed, but heat dissipation efficiency deteriorates due to poor thermal management
Solution Approach 1:
The patent introduces heat dissipation fins as intermediary structures that facilitate thermal transfer from the antenna elements to the surrounding environment. These fins act as thermal conduits, increasing the surface area for heat radiation and convection, thereby improving heat dissipation efficiency without compromising the antenna array's radiation performance.
Solution Approach 2:
The antenna elements are designed with thin-walled conjoining portions and ground portions that provide both structural support and thermal pathways. These thin-walled structures have high surface-area-to-volume ratios that enhance heat dissipation while maintaining the electrical properties needed for antenna operation.
3Device complexity
If conventional antenna structure is used, then simple design is achieved, but impedance matching is poor and reflection loss is high
Solution Approach 1:
The antenna design employs asymmetric configurations where feeding portions and ground portions have different geometries and dimensions optimized for their specific functions. The conjoining portions use asymmetric tapering or meander patterns to provide gradual impedance transformation, reducing reflection loss while maintaining relatively simple overall structure.
Solution Approach 2:
The patent incorporates curved or rounded transitions in the conjoining portions instead of sharp corners, creating smooth impedance transitions that reduce signal reflection. The ground portions may feature curved edges or rounded shapes that improve current distribution and reduce standing waves, thereby lowering reflection loss without significantly increasing structural complexity.
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 design significantly improves radiation efficiency and heat dissipation, allowing the antenna system to effectively cover a broader frequency range, including 5G bands, with enhanced performance in multiple frequency and polarization directions.
Implementation Method 1
The first antenna body and the second antenna body respectively include a feeding portion, a conjoining portion connected to the feeding portion, and a ground portion connected to the conjoining portion. The feeding portion of the first antenna body is coupled to the first positive signal terminal, and the feeding portion of the second antenna body is coupled to the second positive signal terminal.
Implementation Method 2
The first board, the second board, the third board, and the fourth board surround a surrounding space. A first slot is formed between the first board and the second board, a second slot is formed between the second board and the third board, a third slot is formed between the third board and the fourth board, and a fourth slot is formed between the fourth board and the first board.
Data Source
AI summary
An antenna structure includes a holder and a first antenna assembly. The holder includes a first board, a second board, a third board, and a fourth board. The first board, the second board, the third board, and the fourth board are connected to each other to surround a surrounding space. The first antenna assembly includes a first antenna body and a second antenna body. The first antenna body and the second antenna body are disposed in the surrounding space. The first antenna body and the second antenna body respectively include a feeding portion, a conjoining portion, and a ground portion. The ground portion of the first antenna body is connected to the first board. The ground portion of the second antenna body is connected to the second board.