Vehicle Antenna Module Diagonal Pattern Isolation
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Solution Overview
Problem
Vehicle antennas, such as shark fin antennas, are aesthetically unappealing and prone to damage from external environments, and they can generate wind noise at high speeds, while existing solutions fail to efficiently integrate multiple communication bands within a limited space and minimize electromagnetic mutual coupling.
Innovation Solution
An integrated antenna module with a multi-band MIMO configuration, utilizing conductive patterns arranged diagonally in a plane to maximize data transmission rates and reduce electromagnetic interference, is designed to efficiently fit within a vehicle and improve isolation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a shark fin antenna is mounted on the vehicle to support communication protocols, then communication functionality is improved, but aesthetic appearance deteriorates and the antenna becomes vulnerable to external damage
Solution Approach 1:
The patent integrates multiple antenna functions (DMB, GPS, cellular communication) into a single compact antenna module that can be embedded within the vehicle's body structure. This merging of functions eliminates the need for separate external antennas while maintaining all communication capabilities, thus improving aesthetics without sacrificing functionality.
Solution Approach 2:
The antenna module is nested within the vehicle's body structure, with the antenna elements embedded in the chassis or panel. This nesting approach allows the antenna to be hidden within the vehicle's aesthetic design while still functioning effectively, resolving the conflict between appearance and communication functionality.
2Adaptability or versatility
If a shark fin antenna is mounted on the vehicle, then communication functionality is improved, but reliability deteriorates due to damage from external environment
Solution Approach 1:
The antenna is integrated into the vehicle's body structure, combining the antenna function with the existing protective chassis. This integration protects the antenna elements from external damage while maintaining communication functionality, as the vehicle body itself serves as the protective enclosure.
Solution Approach 2:
The vehicle's body structure acts as an intermediary protective layer between the antenna elements and the external environment. This mediator protects the sensitive antenna components from weather, impact, and other external factors while allowing the antenna to function effectively.
3Volume of moving object
If multiple communication bands are integrated within a limited space, then device compactness is improved, but electromagnetic mutual coupling increases
Solution Approach 1:
The antenna module divides different communication functions into separate antenna elements and frequency bands, with each element optimized for specific frequency ranges. This segmentation allows multiple communication bands to coexist in a compact space while minimizing electromagnetic interference through proper spatial and frequency separation.
Solution Approach 2:
Different regions of the antenna module are designed with specific electromagnetic properties optimized for different frequency bands. The patent employs frequency-selective surfaces and localized grounding structures that create different electromagnetic environments for different communication functions, reducing mutual coupling while maintaining compact dimensions.
4Volume of moving object
If antenna elements are positioned close together to fit within limited space, then device compactness is improved, but electromagnetic interference between elements increases
Solution Approach 1:
The antenna module segments different communication functions into distinct elements with dedicated feed networks and grounding structures. This segmentation allows close positioning of elements while maintaining electrical isolation through frequency-selective designs and orthogonal polarization arrangements, reducing electromagnetic interference.
Solution Approach 2:
The patent introduces intermediary structures such as frequency-selective surfaces, electromagnetic shielding layers, and optimized grounding planes between closely positioned antenna elements. These intermediaries act as barriers to electromagnetic coupling, allowing compact element placement while minimizing interference.
Data Source
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AI summary
An antenna assembly in a vehicle is provided. The antenna assembly includes a first plane including a first edge and a second edge extending in parallel to each other in a first direction, a second plane spaced apart from the first plane that overlaps the first plane and including a third edge extending along the first edge, and a fourth edge extending along the second edge, a non-conductive layer interposed between the first plane and the second plane, and a plurality of wireless communication circuits electrically connected to the antenna assembly, wherein the first conductive pattern and the second conductive pattern are positioned diagonally at opposing corners with each other when viewed from above the first plane, and wherein the third conductive pattern and the fourth conductive pattern are positioned diagonally against each other without overlapping with the first and second conductive patterns, when viewed from above the first plane.