Transparent Vehicle Glass Antenna Layout for Wideband MIMO
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Solution Overview
Problem
Existing vehicle antennas face challenges in providing efficient wideband communication due to metallic vehicle bodies blocking radio waves, deteriorated antenna efficiency in transparent antennas, and difficulties in optimizing antenna placement and MIMO performance within limited vehicle spaces.
Innovation Solution
A transparent wideband antenna structure with asymmetrical ground regions and conductive patterns of varying widths, allowing for improved efficiency, reduced interference, and minimized size, enabling MIMO operations in multiple positions on vehicle glass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a transparent antenna is disposed on vehicle glass to maintain exterior design, then antenna visibility is reduced, but antenna radiation efficiency and impedance bandwidth characteristics deteriorate due to electrical loss of the transparent antenna
Solution Approach 1:
The patent uses a transparent resin layer combined with conductive patterns (silver paste or transparent conductive oxide) to create an antenna structure that maintains both transparency and electrical conductivity. The composite structure allows the antenna to be integrated into the glass while preserving exterior design and achieving acceptable radiation efficiency through optimized material composition
Solution Approach 2:
The patent optimizes the electrical parameters of the transparent antenna by adjusting the conductivity of the transparent conductive oxide, the thickness of the resin layer, and the geometric parameters of the conductive patterns. These parameter changes enable the antenna to achieve improved impedance bandwidth and radiation efficiency while maintaining transparency
2Ease of manufacture
If the antenna pattern and ground pattern are disposed on the same layer to simplify structure, then manufacturing is simplified, but the antenna cannot operate as a wideband antenna
Solution Approach 1:
The patent transitions from a planar single-layer structure to a three-dimensional multi-layer structure by stacking the antenna pattern and ground pattern on separate layers with a resin spacer. This dimensional change enables wideband operation through increased effective area and improved impedance characteristics while maintaining manufacturing feasibility through lamination processes
3Productivity
If multiple antenna elements are arranged to provide MIMO functionality, then communication capacity increases, but the antenna module size increases making it difficult to fit within limited vehicle glass regions
Solution Approach 1:
The patent combines multiple antenna elements into a single integrated module with shared ground structures and common feeding networks. By merging functional components and using overlapping element designs, the patent achieves MIMO capability with reduced overall footprint, allowing the antenna module to fit within limited vehicle glass regions while maintaining high communication capacity
Solution Approach 2:
The patent arranges multiple antenna elements in a nested or overlapping configuration where elements are positioned to maximize spatial efficiency. The ground structures and feeding lines are nested shared resources that serve multiple elements simultaneously, reducing the total area required while maintaining full MIMO functionality across LTE and 5G bands
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 transparent antenna structure enhances communication performance, minimizes size, and optimizes antenna efficiency across wide bands, including LTE and 5G, while reducing interference between elements.
Implementation Method 1
a conductive pattern to radiate signals
Implementation Method 2
a transparent antenna made of a transparent material... antenna radiation efficiency... deteriorated due to an electrical loss of the transparent antenna
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
An antenna assembly includes an antenna region having conductive patterns □ on one side surface of a dielectric substrate to radiate radio signals. The antenna region includes a first antenna structure and a second antenna structure. The antenna assembly further includes a ground region formed on a same plane as the antenna region. The ground region includes a first slot region and a second slot region. A first feeding line is disposed at the first slot region, and a second feeding is disposed at the second slot region. The antenna region comprises a first conductive pattern, a second conductive pattern, a third conductive pattern, a fourth conductive pattern and a fifth conductive pattern.