Outward-Facing Antenna Glazing for V2X Efficiency
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Solution Overview
Problem
Conventional glass antennas embedded within vehicle glazing suffer from reduced efficiency due to the glass dielectric effect, which impairs outward radiation, and face challenges in maintaining performance in noisy environments and avoiding mutual interference among multiple antennas.
Innovation Solution
An antenna element is placed on the outwardly oriented face of the glazing, connected to a coaxial cable, and designed as a patch antenna operating between 750 MHz and 28 GHz, allowing for a three-dimensional configuration and compatibility with heated glazing, while being protected by a cover and integrated in a laminated or monolithic glazing structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the antenna is embedded within the glazing, then the structural integrity and aesthetic appearance are improved, but the antenna efficiency and radiation performance deteriorate due to glass dielectric effect
Solution Approach 1:
The patent transitions the antenna from a two-dimensional embedded planar configuration to a three-dimensional protruding structure that extends outward from the glazing surface. This dimensional change allows the antenna to operate in free space rather than being constrained by the glass dielectric environment, thereby resolving the contradiction between aesthetic appearance and antenna efficiency.
2Adaptability or versatility
If multiple antennas are installed in the vehicle, then the communication coverage and functionality are improved, but the mutual interference between antennas increases
Solution Approach 1:
By positioning antennas in three-dimensional space protruding from the glazing rather than embedding them in the same plane, the patent enables better spatial separation between multiple antenna elements. This dimensional arrangement reduces electromagnetic coupling and mutual interference while maintaining comprehensive communication coverage across different frequency bands.
3Reliability
If the antenna operates in the 5.8-5.9 GHz band for DSRC, then the V2X communication performance is improved, but the signal attenuation and noise interference increase
Solution Approach 1:
The patent extracts the antenna from the glass matrix and positions it in free space, removing it from the harmful dielectric environment. This extraction eliminates the glass-induced signal attenuation and noise interference, allowing the antenna to operate efficiently in the 5.8-5.9 GHz DSRC band for reliable V2X communication.
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 configuration enhances antenna performance by avoiding the glass dielectric effect, enabling efficient communication for V2X systems, particularly DSRC, and supports various frequency bands, including 5.8-5.9 GHz, while maintaining structural integrity and aesthetic compatibility with vehicle designs.
Implementation Method 1
conventional glass antennas are placed on the surface of the glazing on the face facing the interior of car or are embedded in the laminated glazing. Therefore, those antennas are submitted to glass dielectric effect decreasing the efficiency especially for outward radiation
Data Source
AI summary
The present invention concerns a vehicle antenna glazing antenna element. According to the present invention, the antenna element is placed on an outwardly oriented face of the glazing and the antenna is working at a frequency comprised between 750 MHZ and 28 GHZ. The antenna 5 element is connected to a co-axial cable.