End-Fire Antenna Array Bracket for Vehicular Radar
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Solution Overview
Problem
Conventional vehicular radar systems face challenges in compact size and signal interference when stacking broadside antennas, which limits their ability to perform volumetric scanning effectively.
Innovation Solution
A structurally supported millimeter-wave end-fire antenna system is developed, utilizing longitudinal ribs and crossbeams to securely hold and stack end-fire antennas, reducing deformation and interference, and featuring a tapered-slot design with a finger ground structure for increased rigidity and minimal signal distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If broadside antennas are stacked on top of each other to reduce area, then area is reduced, but signal interference increases and device complexity increases
Solution Approach 1:
The patent inverts the conventional broadside antenna orientation to use end-fire antennas instead. This fundamental orientation change allows signals to propagate along the antenna axis rather than perpendicular to it, eliminating the interference problem that occurs when broadside antennas are stacked vertically. The end-fire configuration enables compact stacking without the harmful signal interference that plagues broadside antenna arrays.
Solution Approach 2:
The patent transitions from two-dimensional broadside antenna arrays to three-dimensional end-fire antenna stacking. By utilizing the vertical dimension for stacking end-fire antennas and allowing signals to propagate horizontally along the antenna length, the system achieves volumetric scanning capability while maintaining compact footprint. This dimensional reorganization resolves the interference issue inherent in vertical stacking of broadside antennas.
2Volume of moving object
If broadside antennas are stacked to achieve compact size, then compactness is improved, but structural support and deformation resistance deteriorate
Solution Approach 1:
The patent divides the antenna array into modular end-fire antenna units that can be independently stacked and supported. Each antenna element is structurally segmented and mounted on individual support structures, allowing for better mechanical distribution and reduced deformation compared to monolithic broadside antenna arrays. This segmentation enables compact volumetric arrangement while maintaining structural integrity through distributed support points.
3Strength
If end-fire antennas are used with longitudinal ribs and crossbeams, then structural rigidity is improved, but device complexity increases
Solution Approach 1:
The patent merges the support structure (longitudinal ribs and crossbeams) with the antenna mounting function into an integrated framework. Rather than adding separate support elements, the structural ribs and crossbeams are designed to simultaneously provide mechanical rigidity and antenna positioning. This merging reduces overall device complexity by combining structural and functional elements into a unified system.
Data Source
AI summary
Bracket structures that structurally support and enhance the performance of millimeter-wave tapered-slot end-fire antennas for use in vehicular radar systems. The system includes a first longitudinal rib and a second longitudinal rib, each defining a first longitudinal slot and having a transmission end and a chip connection end. The system includes a crossbeam coupled to the first longitudinal rib and the second longitudinal rib. The system includes a first end-fire antenna having a transmission end that is received by the first longitudinal slot and a chip connection end. The first end-fire antenna is designed to transmit a first signal having a first phase. The system includes a second end-fire antenna having a transmission end that is received by the second longitudinal slot and a chip connection end. The second end-fire antenna is designed to transmit a second signal having a second phase that is different than the first phase.