FSS Shielding Structure for Antenna Feed Network Interference
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Solution Overview
Problem
The feed network component of an antenna-filter frequency selective surface-antenna architecture interferes with the performance of the antenna disposed below it, affecting radiation efficiency.
Innovation Solution
An FSS unit is designed with a radiation assembly, receiving assembly, and transmission assembly stacked and spaced apart, incorporating a feed network component and metal shielding members to shield electromagnetic waves and reduce interference, enhancing isolation between antenna arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the feed network component is disposed outside the FSS unit, then the antenna structure is simpler, but the feed network component causes interference to the antenna disposed below the FSS unit, affecting radiation efficiency
Solution Approach 1:
The feed network component is nested inside the FSS unit structure, specifically placed in the space between the radiation assembly and receiving assembly. This nesting approach allows the feed network component to be integrated within the existing FSS architecture, providing electromagnetic shielding from the metal layers while maintaining a compact overall structure.
Solution Approach 2:
The first and second metal layers of the FSS unit act as intermediary shielding elements between the feed network component and the antenna disposed below. These metal layers serve as electromagnetic barriers that prevent interference from propagating to the lower antenna, thus resolving the contradiction between structural simplicity and radiation efficiency.
2Loss of energy
If the feed network component is disposed inside the space between radiation assembly and receiving assembly, then interference to the lower antenna is reduced, but coupling between the feed network component and transmission assembly may affect signal transmission
Solution Approach 1:
The metal shielding members are strategically positioned to provide localized electromagnetic shielding around the feed network component and transmission assembly. This local shielding approach protects these components from interference with the lower antenna while minimizing the impact on signal transmission between the feed network component and transmission assembly.
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 improves radiation efficiency by preventing interference between the feed network component and transmission assembly, as well as between antenna arrays, thereby enhancing overall antenna performance.
Implementation Method 1
at least one metal shielding member with a cavity, the metal shielding member and the feed network component are located in the space, the metal shielding member is configured to shield at least one of the transmission assembly and the feed network component
Data Source
AI summary
An FSS unit includes a radiation assembly, a receiving assembly, and a transmission assembly that are stacked and spaced apart. There is space between the radiation assembly and the receiving assembly. A metal shielding member and a feed network component are located in the space, the metal shielding member is configured to shield at least one of the transmission assembly and the feed network component, and a cavity of the metal shielding member is configured to place the transmission assembly or the feed network component.