Glass-Mounted 28 GHz Antenna Spacing for Higher Radiation Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antenna systems for high-frequency bands like 28 GHz face challenges in maintaining high directivity and reception sensitivity without complicating the configuration of conventional glass plates, which are mechanically processed and require additional components.
Innovation Solution
An antenna system that uses a conventional glass plate with a thickness of 1.1 mm or more and a dielectric loss tangent of 0.005 or more at 28 GHz, where the antenna is attached away from the glass plate surface, utilizing a matching layer and spacer to optimize radiation efficiency without processing the glass plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an electromagnetic wave transmitting material is embedded in the window glass to obtain higher gain, then the antenna gain is improved, but the configuration becomes complicated and requires mechanical processing of the glass plate
Solution Approach 1:
The invention separates the antenna function from the glass plate structure. Instead of embedding transmitting material in the glass, the antenna is mounted on the glass plate surface, dividing the system into independent components (glass plate + antenna assembly) that can be manufactured and installed separately.
Solution Approach 2:
A support structure acts as an intermediary between the antenna and the glass plate. This support structure includes a first support portion attached to the antenna and a second support portion attached to the glass plate, mediating the connection without requiring modification of the glass plate itself.
2Volume of moving object
If the antenna is attached close to the glass plate surface, then the structure is compact, but the radiation efficiency decreases due to interference with electromagnetic waves
Solution Approach 1:
The support structure extends in the thickness direction (Z-axis) of the glass plate, creating spatial separation between the antenna and the glass surface. This dimensional approach allows the antenna to be positioned at an optimal distance for radiation efficiency while maintaining a compact overall structure through the use of a relatively thin support portion.
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
Enables efficient transmission and reception of electromagnetic waves in high-frequency bands without complicating the glass plate configuration, maintaining high radiation efficiency and antenna gain while keeping the glass plate in its standard form.
Implementation Method 1
a glass plate with a thickness of 1.1 mm or more and a dielectric loss tangent of 0.005 or more at 28 GHz
Implementation Method 2
utilizing a matching layer and spacer to optimize radiation efficiency
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An antenna system includes a glass plate having a thickness of 1.1 mm or more and having a dielectric loss tangent of 0.005 or more at 28 GHz, and an antenna located away from one of surfaces of the glass plate, wherein a ratio of electric power radiated from the antenna to electric power input into the antenna is defined as a radiation efficiency, and wherein where an effective wavelength of an electromagnetic wave at a predetermined frequency that is 10 GHz or more is denoted as Ag, and where the radiation efficiency is denoted as η0 [dB] when the glass plate and the antenna are in contact with each other, and is denoted as ηλg/2 [dB] when a distance between the one of the surfaces and the antenna is λg/2, the glass plate and the antenna are arranged so as to obtain the radiation efficiency of ηA [dB] that satisfies ηA ≥ η0 + (ηλg/2 - η0) × 0.1.