Stacked Liquid Crystal Antenna Unit for Reconfigurable 5G Band Coverage
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Solution Overview
Problem
The design of 5G antennas faces challenges due to non-uniform spectrum distribution worldwide, leading to narrow bandwidth and difficulty in covering various 5G communication spectra, which affects user experience and signal quality in terminal devices.
Innovation Solution
An antenna unit is developed by stacking three substrates with a liquid crystal layer in a cavity, featuring a ground layer, feed structure layer, and radiation structure layer, allowing for continuous and reconfigurable resonant frequency tuning through electrically tunable dielectric properties of the liquid crystal material, enhancing gain and radiation efficiency using aperture coupling and Grounded Coplanar Waveguide (GCPW) structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional antenna design is used, then the structure is simple, but the bandwidth is narrow and cannot cover various 5G communication spectra
Solution Approach 1:
The patent introduces a liquid crystal layer that can dynamically change its dielectric properties through voltage control, enabling the antenna to continuously adjust its resonant frequency and adapt to different 5G spectrum bands. This dynamic tuning capability transforms a static antenna into a reconfigurable system that can cover multiple frequency ranges.
Solution Approach 2:
The patent changes the dielectric parameter of the antenna structure by introducing a liquid crystal layer whose dielectric constant can be electrically tuned. By adjusting the voltage applied to the liquid crystal, the effective dielectric constant changes, which directly controls the resonant frequency of the antenna, enabling continuous frequency tuning across 5G spectra.
2Adaptability or versatility
If the antenna structure is made more complex to cover various spectra, then the bandwidth coverage improves, but the design and manufacturing difficulty increases
Solution Approach 1:
The patent embeds the liquid crystal layer within the existing antenna substrate structure, nesting the tunable medium inside the antenna's cavity. This approach integrates the frequency-tuning functionality without requiring separate antenna elements or complex external tuning mechanisms, simplifying the overall manufacturing process while achieving multi-spectrum coverage.
Solution Approach 2:
The liquid crystal layer acts as an intermediary material between the antenna's radiating elements and the ground plane. By controlling the dielectric properties of this intermediary layer through voltage application, the antenna's resonant frequency can be tuned without physically reconfiguring the metal structures, greatly simplifying the manufacturing process compared to mechanically reconfigurable antennas.
3Adaptability or versatility
If a liquid crystal layer is introduced for frequency tuning, then continuous resonant frequency tuning is achieved, but the device complexity increases
Solution Approach 1:
The liquid crystal layer serves multiple functions simultaneously: it acts as the dielectric material for frequency tuning, provides electrical isolation between layers, and enables continuous frequency adjustment through a single voltage control mechanism. This multi-functionality reduces the need for additional components that would otherwise be required to achieve the same tuning capability.
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 provides a simple and stable antenna design that achieves continuous resonant frequency tuning, improving antenna performance to meet 5G communication requirements, with a wide tuning range and enhanced radiation efficiency, effectively addressing the challenges of non-uniform spectrum distribution.
Implementation Method 1
allowing for continuous and reconfigurable resonant frequency tuning through electrically tunable dielectric properties of the liquid crystal material
Data Source
AI summary
An antenna unit includes: a first substrate, a second substrate, and a third substrate which are stacked. The second substrate has a first slotted area. A liquid crystal layer is arranged in a cavity formed by the first substrate, the first slotted area of the second substrate, and the third substrate. The first substrate includes: a first base substrate, a ground layer on one side of the first base substrate close to the second substrate, and a feed structure layer on one side of the first base substrate away from the second substrate. Orthogonal projections of the ground layer and the feed structure layer on second substrate overlap with an orthogonal projection of first slotted area on the second substrate. The third substrate includes: a third base substrate, and a radiation structure layer on one side of the third base substrate close to the second substrate.