Capacitively Coupled Glass Antenna for Wideband Vehicle Reception
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Solution Overview
Problem
Existing glass antennas for vehicles require frequent design adjustments and increased man-hours for managing part numbers due to differences in frequency bands, polarized waves, and coexistence media across countries, leading to inefficiencies in antenna performance.
Innovation Solution
A glass antenna design for vehicles that includes a feed point and capacitively coupled antenna conductors, allowing it to receive both AM and FM frequency bands, with a configuration that can be adapted for worldwide use by optimizing the placement and length of antenna elements to improve antenna gain across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass antenna design is adjusted for each country's frequency bands and polarized waves, then antenna performance is optimized for specific regions, but design complexity and man-hours for managing part numbers increase
Solution Approach 1:
The patent applies universality by designing a single glass antenna structure that can receive both AM and FM frequency bands simultaneously. The antenna incorporates multiple conductor patterns (first and second antenna conductors with different orientations) that enable it to function across different frequency ranges and polarization types, eliminating the need for country-specific design variations while maintaining optimal performance.
Solution Approach 2:
The patent segments the antenna function by incorporating distinct conductor patterns within a single antenna structure. The first antenna conductor is optimized for AM reception while the second antenna conductor handles FM reception, allowing each segment to be optimized for its specific function while working together in a unified design that reduces overall complexity.
2Adaptability or versatility
If multiple antenna conductors are used to receive different frequency bands, then wideband reception capability is improved, but antenna structure complexity increases
Solution Approach 1:
The patent merges multiple antenna functions into a single integrated glass antenna structure. By combining the first antenna conductor (for AM) and the second antenna conductor (for FM) within one glass substrate with a shared feed point, the design achieves wideband reception capability while avoiding the complexity of multiple separate antenna components.
Solution Approach 2:
The unified antenna structure serves multiple functions by incorporating conductor patterns that respond to different frequency bands and polarization types, allowing a single antenna component to replace what would traditionally require multiple specialized antennas.
3Area of stationary object
If antenna elements are capacitively coupled to form compact structures, then space utilization is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes the glass substrate as a thin film medium to implement capacitive coupling between antenna elements. The glass film's consistent dielectric properties provide stable capacitive coupling without requiring precise mechanical alignment, as the coupling is determined by the film's electrical characteristics rather than mechanical tolerances, thereby reducing manufacturing precision requirements.
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 solution enables a glass antenna that can receive wideband radio signals worldwide, reducing the need for country-specific designs and minimizing man-hours for adjustments, while enhancing antenna performance and gain across different frequency bands.
Implementation Method 1
The first transverse element and the third transverse element are adjacent to each other and capacitively coupled to each other to form a first capacitively-coupled portion
Implementation Method 2
The second transverse element and the fourth transverse element are adjacent to each other and capacitively coupled to each other to form a second capacitively-coupled portion
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A glass antenna for a vehicle is disposed adjacent to an upper edge portion of a window glass. The glass antenna for receiving two types of frequency bands includes a feed point; a first antenna conductor; and a second antenna conductor. The first antenna conductor includes a vertical element for feed connection; a first transverse element; and a second transverse element. The second antenna conductor includes a transverse element for feed connection; a vertical element for connection; a third transverse element; a fourth transverse element; an upper vertical element; and an upper transverse element. The first transverse element and the third transverse element are capacitively coupled to each other to form a first capacitively-coupled portion. The second transverse element and the fourth transverse element are capacitively coupled to each other to form a second capacitively-coupled portion. The upper transverse element is located above the second capacitively-coupled portion.