Holographic Antenna Isolation Layout for Close-Spaced Units
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Solution Overview
Problem
Holographic antennas face severe coupling between antenna units due to close arrangements, leading to deteriorated directional patterns and efficiency losses.
Innovation Solution
Incorporation of isolation components and support components between dielectric substrates and a radiation layer, with switch units corresponding to slits, to reduce mutual coupling and enhance isolation between adjacent antenna units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antenna units are arranged closely to achieve low profile and compact structure, then the profile and weight are reduced, but severe coupling between adjacent antenna units occurs leading to deteriorated directional patterns and efficiency losses
Solution Approach 1:
Isolation components are introduced as intermediary elements positioned between adjacent antenna units in the holographic antenna array. These isolation components, which may include dielectric or magnetic materials, act as mediators that reduce the electromagnetic coupling between closely-spaced antenna units while allowing the compact low-profile structure to be maintained. The isolation components effectively decouple the adjacent antenna units, preventing energy loss through mutual coupling.
2Area of stationary object
If antenna units are arranged closely to achieve compact structure, then the device size is reduced, but mutual coupling between adjacent units increases causing deteriorated directional patterns
Solution Approach 1:
Isolation components are positioned between adjacent antenna units to serve as mediators that reduce mutual coupling. These components maintain the compact footprint of the holographic antenna while preserving the directional pattern performance by preventing excessive interaction between closely-spaced antenna elements.
Solution Approach 2:
The isolation components are selectively positioned only in the regions between adjacent antenna units where coupling occurs, rather than uniformly across the entire antenna structure. This localized approach maintains compact dimensions while specifically addressing the coupling problem in critical regions to preserve directional pattern reliability.
Data Source
AI summary
A holographic antenna includes first and second dielectric substrates, a waveguide structure, a radiation layer, a plurality of switch units and a plurality of isolation components; the first dielectric substrate is on a waveguide port of the waveguide structure; the radiation layer is on a side of the first dielectric substrate away from the waveguide structure, and has a plurality of slits; the second dielectric substrate is on a side of the radiation layer away from the first dielectric substrate; the switch units and the isolation components are between the second dielectric substrate and the radiation layer; orthographic projections of each isolation component and each slit on the first dielectric substrate are first and second patterns, respectively; at least one first pattern is between two adjacent second patterns, and a first distance is between the second pattern and the first pattern closest to the second pattern.