ITO Metasurface Antenna Array With Liquid Crystal Beam Steering
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Solution Overview
Problem
Current metasurface antennas are limited to lower frequency bands and lack cost-effective solutions for high frequency bands like millimeter wave or terahertz, with existing adjustable elements being unsuitable and expensive to produce.
Innovation Solution
An array antenna utilizing a liquid crystal material metasurface structure with indium tin oxide (ITO) radiation patches and a direct current bias wire, allowing for continuous frequency adjustment up to millimeter or terahertz bands and enabling flexible beam control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If integrated circuits are produced for high frequency band metasurface antennas, then the antennas can operate at millimeter wave or terahertz frequencies, but the production cost is high and loss is large
Solution Approach 1:
The patent employs liquid crystal material that can be easily deposited and reconfigured without requiring expensive integrated circuit fabrication processes. The liquid crystal-based metasurface can be produced using simpler, lower-cost techniques while achieving the same high frequency band operation, thereby significantly reducing production cost while maintaining millimeter wave and terahertz operational capability
Solution Approach 2:
By using liquid crystal material whose properties can be continuously adjusted through bias voltage changes, the patent eliminates the need for expensive integrated circuits. The liquid crystal system provides a cost-effective alternative that achieves high frequency operation through material property modulation rather than complex circuit fabrication, thus resolving the production cost contradiction while maintaining adaptability across high frequency bands
2Adaptability or versatility
If integrated circuits are produced for high frequency band metasurface antennas, then the antennas can operate at millimeter wave or terahertz frequencies, but the signal loss is large
Solution Approach 1:
The patent replaces integrated circuit components with liquid crystal material that directly modulates electromagnetic wave propagation through voltage-controlled molecular orientation. This substitution eliminates the multiple interfaces and components in integrated circuits that cause signal loss, resulting in lower energy loss while maintaining high frequency band operation capability
Solution Approach 2:
The liquid crystal material provides a low-loss alternative to expensive integrated circuits for high frequency operation. The material's direct electromagnetic interaction without complex circuitry reduces signal loss, thereby resolving the energy loss contradiction while maintaining adaptability across millimeter wave and terahertz frequency bands
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
Expands the operational frequency band of metasurface antennas to millimeter or terahertz frequencies, providing continuous adjustability and reducing production costs while enhancing beam control capabilities.
Implementation Method 1
the middle dielectric plate includes a metasurface structure formed by a liquid crystal material
Implementation Method 2
adjusting bias voltage
Data Source
AI summary
An array antenna includes an upper dielectric plate, a middle dielectric plate and a lower dielectric plate disposed from top to bottom, and the middle dielectric plate comprises a metasurface structure formed by a liquid crystal material. The metasurface structure may include a liquid crystal material layer, a digital radiation assembly printed on the liquid crystal material layer, and a direct current bias wire. The digital radiation assembly may include M×M digital radiation units arranged in an array, each of the digital radiation units comprises N×N indium tin oxide (ITO) radiation patches arranged in an array, and ITO radiation patches arranged in a same row are connected by the direct current bias wire.