Liquid-Crystal Antenna Beam Steering for 5G Tracking
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Solution Overview
Problem
In 5G wireless communication, directional antennas are required to concentrate signal energy and reduce interference, while also needing to quickly track wireless apparatuses to maintain signal quality, which existing technologies have not effectively addressed.
Innovation Solution
A liquid-crystal antenna apparatus with microwave elements and a control unit that adjusts the orientation of liquid-crystal cells to form and direct beams towards the source of wireless signals, using time-division multiplexing and varying arrangements of tracking sections to determine and track the source orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If directional antennas are used to concentrate signal energy, then signal quality and communication efficiency are improved, but the ability to quickly track moving wireless apparatuses deteriorates
Solution Approach 1:
The patent applies dynamics by making the antenna beam direction adjustable and controllable. The liquid crystal antenna elements can dynamically change their orientation and the beam direction can be electronically steered to track moving wireless apparatuses, resolving the contradiction between maintaining directional signal concentration and achieving quick tracking capability
Solution Approach 2:
The patent changes the physical state and orientation parameters of the liquid crystal antenna elements. By adjusting the liquid crystal molecule alignment through applied electric fields, the antenna can dynamically alter its radiation pattern and beam direction, enabling both signal concentration and tracking functionality
2Speed
If liquid-crystal cells are continuously adjusted to track wireless apparatuses, then tracking capability is improved, but the lifespan of microwave elements deteriorates due to increased stress
Solution Approach 1:
The patent implements periodic action by using time-division multiplexing to alternate between tracking operations and rest periods for the liquid crystal antenna elements. The elements are adjusted only when necessary for tracking, rather than continuous adjustment, reducing cumulative stress and extending element lifespan while maintaining tracking capability
Solution Approach 2:
The patent applies preliminary action by pre-positioning the liquid crystal antenna elements in optimal orientations for anticipated tracking scenarios. This reduces the frequency and magnitude of adjustments needed during actual tracking, thereby reducing stress on the elements while maintaining effective tracking performance
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 liquid-crystal antenna apparatus effectively tracks wireless apparatuses, improving signal quality by concentrating signal energy and reducing interference, while extending the lifespan of microwave elements through reduced stress and efficient beam management.
Implementation Method 1
each of the microwave elements includes a first electrode, a second electrode opposite to the first electrode, and a liquid-crystal cell disposed between the first electrode and the second electrode
Implementation Method 2
The control unit determines the source orientation of the wireless signal according to the wireless signal received by the liquid-crystal antenna unit, and controls the first direction of the first beam to direct toward the source orientation
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C~3A
AI summary
A liquid-crystal antenna apparatus is provided. The liquid-crystal antenna apparatus includes: a liquid-crystal antenna unit and a control unit. The liquid-crystal antenna unit is configured to receive a wireless signal. The liquid-crystal antenna unit includes a plurality of microwave elements, and each of the microwave elements includes a first electrode, a second electrode opposite to the first electrode, and a liquid-crystal cell disposed between the first electrode and the second electrode. The control unit is electrically connected to the liquid-crystal antenna unit, and is configured to control the liquid-crystal antenna unit to form a first beam having a first direction. The control unit determines a source orientation of the wireless signal according to the wireless signal received by the liquid-crystal antenna unit, and controls the first direction of the first beam to direct toward the source orientation.