Cross-Substrate Antenna Layout With Dummy Corner Element
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Solution Overview
Problem
Existing antenna devices face challenges in achieving high detection accuracy and miniaturization due to characteristic differences between elements at the intersection of substrates, particularly at corners, which affect directivity and radiation patterns.
Innovation Solution
The antenna device incorporates a dummy element at the intersection of substrates to minimize characteristic differences among elements, ensuring consistent performance and allowing for miniaturization by eliminating the need for elements at corner portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If elements are arranged at the intersection of substrates to increase antenna density, then device miniaturization is achieved, but characteristic differences among elements increase affecting directivity
Solution Approach 1:
The patent applies local quality by making the dummy element at the intersection different from regular elements. The dummy element has a specific structure (conductive pattern connected to ground) that compensates for its position at the substrate intersection, thereby maintaining characteristic consistency across all elements while enabling compact arrangement.
Solution Approach 2:
The dummy element acts as an intermediary component at the intersection of substrates. It mediates the electromagnetic field distribution and characteristic differences that arise from the intersection geometry, allowing regular elements to maintain consistent performance even when densely arranged.
2Area of stationary object
If corner portions are utilized for element placement to maximize space usage, then device miniaturization is achieved, but directivity performance deteriorates due to characteristic differences
Solution Approach 1:
The dummy element at the corner/intersection has a specialized local structure designed to compensate for the geometric discontinuity. This local quality adjustment ensures that elements near corners have similar characteristics to those in regular positions, maintaining reliable directivity performance while maximizing substrate utilization.
3Device complexity
If substrate intersection is minimized to reduce manufacturing complexity, then device complexity is reduced, but antenna element density decreases limiting miniaturization
Solution Approach 1:
The patent extracts the problematic intersection region from the regular element array and places a dummy element there. This separation allows the main element array to maintain simple, regular patterns while the dummy element handles the complexity of the intersection, thereby maintaining both low manufacturing complexity and high element density.
Data Source
AI summary
According to one embodiment, an antenna device includes a first antenna and a second antenna. The first antenna includes a first substrate and a plurality of first elements. The first substrate includes a first face along a first direction and a second direction. The plurality of first elements are arranged along the second direction. The second antenna includes a second substrate and a plurality of second elements. The second substrate includes a second face along the first direction and a third direction. The plurality of second elements are arranged along the third direction. The third direction crosses a plane including the first direction and the second direction. One of the plurality of first elements overlaps the second substrate in the third direction.