Wire Grid Polarizer Antenna for Transparent Substrates
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Solution Overview
Problem
Microstrip antennas face limitations in applications involving transparent materials and environments, such as window glass, due to their inability to transmit light and susceptibility to signal shielding, which affects their performance.
Innovation Solution
The antenna design incorporates a wire grid polarizer structure on both the ground and radiation layers, allowing for light transmission and integration with transparent materials, reducing signal shielding and enhancing performance by implementing a half-transmission-half-reflection mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a microstrip antenna is used, then electromagnetic wave transmission function is achieved, but light transmission is blocked and signal shielding occurs
Solution Approach 1:
The antenna structure is segmented into a wire grid polarizer layer and a microstrip antenna layer, allowing light to pass through the grid structure while the microstrip layer handles electromagnetic signals. The wire grid polarizer is divided into parallel conductive wires with spacing smaller than the wavelength of visible light, enabling optical transparency while maintaining RF functionality.
Solution Approach 2:
A wire grid polarizer is introduced as an intermediary layer between the transparent substrate and the microstrip antenna. This intermediary structure allows visible light to pass through while guiding and shielding electromagnetic waves, effectively decoupling the optical and electromagnetic functions.
2Adaptability or versatility
If traditional antenna materials are used, then electromagnetic wave transmission is achieved, but integration with transparent materials is difficult
Solution Approach 1:
The antenna employs a composite structure combining transparent substrate materials (such as glass or transparent polymer) with conductive wire grid polarizer layers and microstrip antenna elements. This composite design enables both optical transparency and electromagnetic wave transmission functionality.
Solution Approach 2:
Different regions of the antenna structure have different properties: the substrate and wire grid polarizer regions are optimized for light transmission, while the microstrip antenna regions are optimized for electromagnetic signal handling. This local differentiation allows simultaneous achievement of transparency and signal functionality.
3Illumination intensity
If a wire grid polarizer structure is added to enable light transmission, then light-admitting quality is improved, but device complexity increases
Solution Approach 1:
The wire grid polarizer and microstrip antenna are merged into a single integrated structure where the same conductive elements serve dual purposes: acting as the wire grid polarizer for light transmission and as the radiating elements for the microstrip antenna. This merging reduces the number of separate components needed.
Solution Approach 2:
The conductive wire grid structure is designed to perform multiple functions simultaneously: it acts as a polarizer for visible light, a ground plane for the microstrip antenna, and a signal transmission path. This multi-functionality reduces overall device complexity despite the advanced structure.
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 design enables the antenna to combine with transparent materials like glass, saving design space, reducing signal shielding, and improving working performance by maintaining light-admitting quality and efficient electromagnetic wave transmission.
Implementation Method 1
The ground layer and the radiation layer each comprise a wire grid polarizer structure
Implementation Method 2
a dielectric layer between the first substrate and the second substrate
Implementation Method 3
The antenna is a convertor, which can convert a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium
Data Source
AI summary
An antenna and an electronic device are provided. The antenna includes a first substrate, a second substrate, a dielectric layer, a ground layer and a radiation layer. The second substrate faces to the first substrate. The dielectric layer is between the first substrate and the second substrate. The ground layer is on a first surface of the first substrate. The radiation layer is on a second surface of the second substrate, and the second surface of the second substrate and the first surface of the first substrate face each other. The ground layer and the radiation layer each include a wire grid polarizer structure.