Periodic-Structure Dipole Array for Multi-Band Shielding Reduction
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Solution Overview
Problem
In antenna arrays, the close arrangement of dipoles across different frequency bands leads to mutual shielding, causing distortion in radiation patterns and affecting radiation performance, especially as more frequency bands are supported.
Innovation Solution
The implementation of a radiating element with dipoles suspended on a supporter and covered with a periodic structure, such as metal rings, which changes the equivalent dielectric constant or permeability, allowing electromagnetic waves to be diffracted and reducing directional changes, thereby minimizing shielding between dipoles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dipoles are closely arranged to support multiple frequency bands, then the antenna array can operate across more frequency bands, but mutual shielding occurs causing radiation direction distortion
Solution Approach 1:
A periodic structure is introduced as an intermediary component covering the dipole surface. This periodic structure acts as a mediator that modifies the interaction between electromagnetic waves and the dipole, enabling wave diffraction and preventing direct shielding effects while maintaining the close arrangement of dipoles for multi-band operation
Solution Approach 2:
The periodic structure changes the electromagnetic parameters (equivalent dielectric constant or equivalent permeability) of the dipole surface. By modifying these parameters, the electromagnetic wave propagation characteristics are altered, allowing waves to diffract around the dipole rather than being blocked, thus maintaining radiation direction accuracy
2Adaptability or versatility
If more dipoles are arranged to support more frequency bands, then multi-band transmission capability is enhanced, but shielding between dipoles increases causing pattern distortion
Solution Approach 1:
The periodic structure serves as an intermediary layer between adjacent dipoles, modifying the electromagnetic field distribution and preventing direct shielding interactions. This allows multiple dipoles to be closely arranged for multi-band support without generating harmful shielding effects
Solution Approach 2:
The periodic structure converts the potentially harmful shielding effect into a beneficial diffraction effect. By introducing the periodic modulation, electromagnetic waves that would normally be blocked are instead diffracted, transforming the shielding problem into an opportunity for improved wave propagation
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
This approach improves radiation performance by reducing directional distortions and enhancing the operating bandwidth of the antenna array, allowing simultaneous efficient transmission across multiple frequency bands.
Implementation Method 1
The periodic structure is configured to enable an electromagnetic wave radiated to a first surface of each dipole to be incident to a second surface of each dipole
Implementation Method 2
an electromagnetic wave radiated to a first surface of each dipole is incident to the second surface of each dipole
Data Source
AI summary
This application provides a radiating element, an antenna array, and a network device, to avoid mutual shielding between dipoles during multi-band transmission, and therefore improve radiation performance. The radiating element includes one or more dipoles and a supporter. The one or more dipoles are suspended on the top of the supporter, and each of the one or more dipoles is connected to the supporter at a specific angle. A dipole arm of each dipole is covered with a periodic structure. The periodic structure is configured to enable an electromagnetic wave radiated to a first surface of each dipole to be incident to a second surface of each dipole, where the first surface and the second surface are any two opposite surfaces of each dipole.