Base Station Antenna Front-Surface Feeding Design
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Solution Overview
Problem
Existing dual-band dual-polarized mobile communication base station antennas have a complex structure with large size due to the need for multiple accessories and limited space for signal processing equipment, primarily because the dipole-type radiating element's feeding line requires a large space on the back surface of the reflecting plate.
Innovation Solution
The antenna design simplifies the structure by stacking a dipole-type radiating element on a patch-type element and improves the feeding structure by using balun supports and a feeding circuit board on the front surface, allowing for more efficient space utilization on the back surface and reducing the overall size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the dipole-type radiating element is stacked on the patch-type radiating element with traditional feeding structure, then the antenna can achieve dual-band dual-polarization function, but the structure becomes complex and the size increases due to large space requirements for feeding lines on the back surface of the reflecting plate
Solution Approach 1:
The patent moves the feeding circuit board from the back surface of the reflecting plate to the front surface, utilizing the unused front surface area. This dimensional relocation eliminates the need for feeding lines to traverse the back surface, thereby simplifying the structure and reducing the antenna's overall size while maintaining dual-band dual-polarization functionality
Solution Approach 2:
The patent introduces balun supports as intermediary components that directly connect the dipole-type radiating element to the feeding circuit board on the front surface. These balun supports serve as mediators that eliminate the need for complex feeding line arrangements on the back surface, simplifying the overall structure
2Adaptability or versatility
If the dipole-type radiating element is stacked on the patch-type radiating element with traditional feeding structure, then the antenna can achieve dual-band dual-polarization function, but the overall size increases due to limited space for signal processing equipment on the back surface
Solution Approach 1:
By relocating the feeding circuit board to the front surface of the reflecting plate, the patent frees up the back surface space. This allows signal processing equipment to be mounted on the back surface without increasing the antenna's overall volume, thereby reducing the antenna size while maintaining full functionality
Solution Approach 2:
The patent segments the antenna structure by separating the feeding function (handled by the feeding circuit board on the front surface) from the signal processing function (handled by equipment on the back surface). This segmentation allows independent optimization of space utilization, reducing overall antenna volume
Data Source
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AI summary
The present invention provides a mobile communication base station antenna comprising: a reflecting plate; a first patch-type radiating element installed on the reflecting plate; a second dipole-type radiating element installed and stacked on the first radiating element; and a circuit board for feeding power installed on the same surface as a surface of the reflecting plate on which the first radiating element and the second radiating element are installed and having a conductive pattern formed thereon to provide a feeding signal to the first radiating element.