Waveguide Antenna With Horizontal Divider for Wide-Angle Broadband Radar
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Solution Overview
Problem
Current automotive radar antennas struggle to provide both wide-angle and broadband characteristics, with existing waveguide technologies either lacking wide-angle or broadband capabilities.
Innovation Solution
A waveguide antenna design incorporating a horn-type horizontal distribution divider structure, featuring a two-layer configuration with a horizontally deployed divider and ridge and width steps for impedance matching, eliminating the need for electric field twists and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slot type or horn type waveguide antenna technologies are used, then one of wide-angle or broadband characteristics can be provided, but both characteristics cannot be provided simultaneously
Solution Approach 1:
The antenna is divided into multiple waveguide branches (first through fourth radio wave radiating units) arranged in a matrix pattern, with each branch serving as an independent segment that contributes to the overall wide-angle and broadband characteristics. This segmentation allows each unit to be optimized independently while achieving combined performance benefits.
Solution Approach 2:
Different regions of the antenna structure are designed with different properties: the power feeder includes impedance matching structures (ridge with thickness step, width step) at specific locations, and each waveguide branch has optimized dimensions. This local optimization enables simultaneous achievement of wide-angle radiation and broadband impedance matching.
2Device complexity
If a horn-type horizontal distribution divider structure is applied with a two-layer configuration, then the antenna structure is simplified and compact, but impedance matching complexity increases
Solution Approach 1:
Impedance matching structures (ridge with thickness step part, width step part) are built into the power feeder during the initial manufacturing process. This preliminary incorporation of impedance matching features eliminates the need for post-assembly adjustments and simplifies the overall structure while ensuring precise impedance matching from the start.
Solution Approach 2:
The ridge structure with thickness step part is nested within the width step part of the power feeder. This nested configuration allows multiple impedance matching functions to be integrated into a single compact structure, reducing overall complexity while maintaining manufacturing precision.
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 design achieves both wide-angle and broadband characteristics, enhancing object detection capabilities in automotive radars with a simplified and compact antenna configuration.
Implementation Method 1
waveguide antenna
Implementation Method 2
horn-type horizontal distribution divider structure
Implementation Method 3
ridge and width steps for impedance matching
Data Source
AI summary
The present disclosure is to provide a waveguide antenna to which a horn-type horizontal distribution divider structure is applied, and the waveguide antenna according to the present disclosure may comprise the first layer having a power feeder provided in the horizontal direction and the horizontal divider connected to the power feeder and provided in the horizontal direction, the second layer including the first divider power feeder connected to the first layer and connected to one side of the horizontal divider through the first through hole, the second divider power feeder connected to the other side of the horizontal divider through the second through hole, the first and second radio wave radiating units connected to the first divider power feeder, and the third and fourth radio wave radiating units connected to the second divider power feeder.