Bent Polygonal Antenna Vibrator for Isolation and Bandwidth
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Solution Overview
Problem
Current 5G Massive MIMO base station antennas face challenges in optimizing the cross-polarization ratio and isolation due to the size of the vibrators and the need for additional boundary conditions.
Innovation Solution
The antenna vibrator design incorporates bending portions and extending portions on a polygonal radiation board, which reduces the size of the vibrator, optimizes isolation, and enhances the cross-polarization ratio without requiring additional boundary conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the vibrator size is increased, then the isolation of the sub array is improved, but the spacing between vibrators becomes small which affects isolation
Solution Approach 1:
The patent applies dimensionality change by bending the radiation board downward to form supporting portions and extending portions that protrude toward the reflector. This three-dimensional transformation allows the vibrator to achieve better isolation performance without increasing its planar size, resolving the contradiction between vibrator size and isolation.
Solution Approach 2:
The radiation board is bent into curved three-dimensional shapes forming supporting portions and extending portions. This curvature transformation enables the vibrator to achieve improved isolation characteristics while maintaining a compact size, addressing the contradiction between size and isolation performance.
2Manufacturing precision
If boundary conditions (metal sheets) are added to optimize cross polarization ratio, then the cross polarization ratio is improved, but the device complexity increases
Solution Approach 1:
The patent extracts and eliminates the need for additional boundary conditions (metal sheets) by incorporating cross-polarization optimization directly into the vibrator structure through bending portions and extending portions. This removes the separate boundary condition components while achieving the desired cross-polarization performance.
Solution Approach 2:
The patent merges the cross-polarization optimization function with the vibrator structure itself. The bending portions and extending portions are integrated into the vibrator design, combining structural support and cross-polarization control into a single unified component, thereby reducing device complexity.
3Length of moving object
If the vibrator size is reduced, then the spacing between vibrators is increased improving isolation, but the operating bandwidth may be affected
Solution Approach 1:
By transforming the radiation board into three-dimensional bending portions and extending portions, the patent enables the vibrator to maintain compact size while preserving operating bandwidth. The vertical bending components provide additional radiation paths that sustain bandwidth performance despite reduced planar dimensions.
Solution Approach 2:
The patent changes the geometric parameters of the vibrator by introducing bending angles, heights, and extending portion dimensions. These parameter transformations allow the vibrator to achieve reduced size while maintaining or enhancing operating bandwidth through optimized three-dimensional geometry.
Data Source
AI summary
The embodiment of the disclosure discloses an antenna vibrator and an antenna, wherein the antenna vibrator comprises a radiation board. The radiation board is polygonal, and some areas of the radiation board are bent down to provide multiple supporting portions and multiple leaks. The corners of the radiation board are bent down provided with multiple bending portions, and each bending portion extends to both sides to form two extending portions. Therefore, by providing bending portions and extending portions, it may effectively reduce the size of the antenna vibrator, thereby optimizing the isolation of the antenna vibrator and increasing the working bandwidth of the antenna vibrator. Moreover, after the antenna vibrator is arrayed, the cross-polarization ratio may meet high-performance specifications without adding boundary conditions.