Liquid Crystal Antenna Labyrinth Gap Structure
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Solution Overview
Problem
Existing liquid crystal antennas face challenges such as large volume, high failure rate, slow beam orientation, high maintenance cost, and adverse effects from gravity-induced non-uniform liquid crystal distribution due to their thickness, which affects signal transmission and reception performance, especially at high temperatures.
Innovation Solution
A liquid crystal antenna design featuring a run-through labyrinth-type gap between substrates with larger first protrusions and smaller second protrusions, along with a delay line layer and metallic shielding, to stabilize liquid crystal distribution and reduce signal loss, and a manufacturing method involving patterning and injection of liquid crystals between substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a liquid crystal cell with large thickness (e.g., 100 μm) is used to form a support structure, then the structural support capability is improved, but gravity-induced non-uniform liquid crystal distribution occurs causing display defects and performance degradation
Solution Approach 1:
The patent divides the liquid crystal cell into multiple compartments using partition structures (protrusions and recesses) formed on the substrate surfaces. These partitions segment the liquid crystal into multiple regions, preventing gravity-induced convection and maintaining uniform distribution. The partition structures create isolated zones that restrict liquid crystal movement, thereby solving the contradiction between providing structural support and maintaining composition stability.
Solution Approach 2:
The patent introduces vertical dimension features (protrusions and recesses) on the substrate surfaces to create a three-dimensional partition structure. This dimensional change transforms the flat two-dimensional liquid crystal layer into a multi-level structure with controlled flow paths, enabling the liquid crystal to be confined in specific regions and preventing gravity-induced non-uniformity while maintaining cell thickness for structural support.
2Stability of the object's composition
If the liquid crystal cell thickness is reduced to improve display quality, then gravity Mura effects are reduced, but the structural support capability deteriorates
Solution Approach 1:
By segmenting the liquid crystal cell into multiple compartments using substrate protrusions and recesses, the patent enables the use of thinner liquid crystal layers while maintaining structural integrity. The partition structures provide the necessary mechanical support and confinement, allowing reduced thickness without compromising support capability or uniformity.
Solution Approach 2:
The patent employs composite structures combining substrate protrusions, recesses, and liquid crystal materials to create a unified system that provides both structural support and uniform distribution. The combination of rigid substrate features and flexible liquid crystal filling creates a composite structure that achieves both mechanical strength and compositional stability.
3Area of stationary object
If a conventional liquid crystal antenna design is used with limited space projection area, then device compactness is improved, but mutual coupling effect increases adversely affecting reception and transmission performance
Solution Approach 1:
The patent utilizes the vertical dimension by forming protrusions and recesses on the substrate surfaces, creating a three-dimensional structure that increases the effective electrical aperture without increasing the planar footprint. This dimensional transition allows the antenna to achieve better signal performance while maintaining a compact form factor, resolving the contradiction between area reduction and performance maintenance.
4Adaptability or versatility
If mechanical scanning antenna is used to achieve beam orientation control, then beam steering capability is improved, but device volume, weight, and maintenance cost increase
Solution Approach 1:
The patent replaces the mechanical scanning system with an electronic control system using liquid crystal's electro-optic properties. By applying voltages to control liquid crystal orientation, the antenna achieves beam steering without moving parts. This substitution eliminates the need for mechanical scanners, reducing device volume, weight, and maintenance requirements while maintaining beam orientation control capability.
Solution Approach 2:
The patent controls beam orientation by changing the electrical parameters (voltage) applied to the liquid crystal, which alters the liquid crystal's optical and electromagnetic properties. This parameter-based control replaces mechanical position changes, enabling adaptive beam steering with simpler, more compact device architecture.
Data Source
AI summary
A liquid crystal antenna includes a first substrate, a second substrate, and liquid crystals arranged between the first substrate and the second substrate. First protrusions and second protrusions are arranged at a surface of the second substrate facing the first substrate, a size of each first protrusion in a first direction is substantially greater than a size of each second protrusion in the first direction, and the first direction is a direction perpendicularly from the second substrate to the first substrate. A run-through labyrinth-type gap is defined by the first protrusions at a surface of the second substrate, and each second protrusion is arranged in the labyrinth-type gap.