Hybrid Loop Monopole Antenna for Vehicle Window Attachment Area Reduction
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Solution Overview
Problem
Conventional antenna devices with multiple loop antennas on vehicle windows occupy a large attachment area, limiting space for other apparatuses like cameras and increasing the risk of interference, which restricts the placement of additional devices.
Innovation Solution
The antenna device incorporates a hybrid configuration of loop and monopole antennas, where monopole antennas are used in conjunction with loop antennas to reduce the overall attachment area by optimizing their placement and design, such as positioning monopole antennas closer to pillars to minimize interference and reduce the attachment area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If loop antennas are used for receiving electric waves, then reception performance is maintained, but attachment area becomes large
Solution Approach 1:
The patent combines loop antennas and monopole antennas into a hybrid configuration on the same window surface. The loop antennas (first and second) and monopole antennas (third and fourth) work together to receive electric waves, allowing the system to maintain reception performance while reducing the total attachment area compared to using only loop antennas.
Solution Approach 2:
The patent changes the antenna type parameter from exclusively loop antennas to a hybrid of loop and monopole antennas. Monopole antennas have a more compact structure suitable for vertical polarization reception, while loop antennas handle horizontal polarization. This parameter change enables smaller attachment area while maintaining reception capabilities.
2Reliability
If multiple loop antennas are arranged on the window, then reception coverage is improved, but available space for other apparatuses is reduced
Solution Approach 1:
By merging loop and monopole antenna types in a hybrid configuration, the patent achieves diverse reception coverage (both horizontal and vertical polarization) with a more space-efficient arrangement. This allows other apparatuses to be placed on the window without compromising reception coverage.
3Device complexity
If loop antennas are used exclusively, then simple antenna structure is maintained, but attachment area increases
Solution Approach 1:
The patent merges simple loop antenna structures with monopole antenna structures. Each antenna type remains relatively simple in design, but their combination enables more efficient space utilization on the window surface, reducing total attachment area while maintaining structural simplicity.
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 allows for a reduction in the total attachment area, enabling more flexible placement of other devices on the vehicle window while maintaining effective reception of both horizontally and vertically polarized waves with reduced interference between antennas.
Implementation Method 1
a first loop antenna 30 and a second loop antenna 50... The first loop antenna 30 and the second loop antenna 50 respectively have directionalities 30D and 50D whose directions are parallel to a traveling direction of the vehicle 1
Implementation Method 2
a first monopole antenna 40 and a second monopole antenna 60... the first monopole antenna 40 and the second monopole antenna 60 respectively have directionalities 40D and 60D each of whose directions is opposite to the corresponding front pillar 3
Data Source
AI summary
An antenna device according to an embodiment includes a plurality of plane-shaped antennas that is attached to one or more windows of a vehicle. The plurality of antennas includes a loop antenna and a monopole antenna corresponding to the loop antenna.