Reconfigurable Antenna Structure With Voltage-Controlled Polarization
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Solution Overview
Problem
Current reconfigurable antennas lack the ability to easily switch between multiple polarization modes without complex structures, which limits their versatility in modern wireless communication systems.
Innovation Solution
The antenna structure incorporates a dielectric layer with an adjustable dielectric constant, paired with radiation phase shift units on opposing substrates, allowing for independent control of phase shifts in two polarization directions by applying bias voltages, enabling the generation of multiple polarization modes through signal superposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reconfigurable antenna uses a fixed physical structure and aperture, then the antenna structure is simple and easy to manufacture, but it cannot easily switch between multiple polarization modes
Solution Approach 1:
The patent applies the dynamics principle by making the dielectric layer's effective permittivity dynamically adjustable through voltage control. The liquid crystal dielectric layer's permittivity changes in response to applied voltages, enabling real-time switching between different polarization modes (linear, circular, elliptical) without any physical movement or structural reconfiguration. This resolves the contradiction by providing adaptability through electrical control while maintaining a fixed, simple physical structure.
Solution Approach 2:
The patent implements parameter changes by modifying the effective permittivity of the dielectric layer to control polarization mode switching. By adjusting the voltage applied to the liquid crystal layer, the effective permittivity parameter changes, which directly controls the phase difference between orthogonal polarization components. This enables multiple polarization modes to be achieved through parameter modulation rather than structural changes, resolving the technical contradiction.
2Adaptability or versatility
If the antenna uses multiple radiation elements to achieve polarization diversity, then multiple polarization modes can be generated, but the number of antenna components and manufacturing complexity increases
Solution Approach 1:
The patent applies universality by making a single radiation element perform multiple functions through the dielectric layer control. The same radiation element can generate different polarization modes (linear, circular, elliptical) by simply changing the voltage applied to the liquid crystal layer, eliminating the need for multiple dedicated radiation elements for different polarization modes. This multi-functionality approach reduces component count and simplifies manufacturing while maintaining polarization diversity.
Solution Approach 2:
The patent merges the functions of multiple polarization-generating elements into a single radiation element by using the voltage-controlled dielectric layer as the controlling mechanism. Instead of having separate antenna elements for different polarization modes, the invention combines them into one element whose radiation characteristics are controlled by the dielectric layer's permittivity, which is adjusted via voltage. This merging reduces the number of components and simplifies the manufacturing process.
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
This solution allows for continuous phase shift control from 0° to 360° in two polarization directions, enabling the generation of various polarization modes such as linear, circular, and elliptical polarizations, enhancing the antenna's adaptability and efficiency in wireless communication systems.
Implementation Method 1
a dielectric layer, with an adjustable dielectric constant, arranged between the first substrate and the second substrate
Implementation Method 2
enabling the generation of multiple polarization modes through signal superposition... continuous phase shift control from 0° to 360°
Implementation Method 3
a first radiation phase shift unit and a second radiation phase shift unit... a third radiation phase shift unit and a fourth radiation phase shift unit
Implementation Method 4
enabling the generation of multiple polarization modes such as linear, circular, and elliptical polarizations
Data Source
AI summary
Provided are an antenna structure, an array antenna and an electronic device. The antenna structure includes a first substrate, a second substrate and a dielectric layer with an adjustable dielectric constant. The first substrate includes a first base and a first and a second radiation phase shift unit. The second substrate includes a second base and a third and a fourth radiation phase shift unit. Orthographic projections of the first and third radiation phase shift units on the first base at least partially overlap. Orthographic projections of the second and fourth radiation phase shift units on the first base at least partially overlap. A first included angle is formed between extending directions of radiation areas of the first and second radiation phase shift units; a second included angle is formed between extending directions of radiation areas of the third and fourth radiation phase shift units.