Vehicle Side Radar Antenna PCB Layout for Blind-Spot Coverage
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Solution Overview
Problem
Conventional radar antenna devices have detection blind regions due to directional radiation patterns, limiting their detection capability.
Innovation Solution
A radar antenna device with two antenna PCBs installed on a vehicle's lateral surface, where each PCB has a radar transmitting unit, forming an intersection with a signal border, and optimizing angles and distances to minimize detection blind zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single radar antenna with directional radiation pattern is used, then the signal strength is strong within a specific angle range, but detection blind regions are formed outside the strong signal region
Solution Approach 1:
The patent divides the radar antenna system into multiple independent transmitting units (at least two) with different radiation patterns. Each unit covers a specific angular range, and their combined coverage eliminates detection blind regions. This segmentation approach maintains individual unit simplicity while achieving comprehensive coverage through multiple units.
Solution Approach 2:
The patent transitions from a single-directional radiation pattern to multi-directional coverage by arranging multiple transmitting units at different orientations. The radiation patterns are distributed across different angular dimensions, creating overlapping coverage that eliminates blind spots while maintaining system manageability.
2Area of stationary object
If multiple circuit boards are used to increase the range of strong signal region, then the coverage area is expanded, but detection blind regions still affect the detection capability
Solution Approach 1:
The patent optimizes the radiation pattern of each transmitting unit to have different local characteristics. By designing units with complementary radiation patterns where one unit's strong signal region covers another's weak signal region, the system achieves uniform coverage across the entire monitoring area without blind spots.
Solution Approach 2:
The patent combines multiple radar transmitting units with different radiation patterns into a single integrated antenna device. The units are positioned and oriented so their coverage areas overlap and complement each other, merging their individual strong and weak signal regions to create comprehensive coverage that eliminates detection blind regions.
Data Source
AI summary
A radar antenna device for being installed on a lateral surface of a vehicle is provided by the present disclosure. The radar antenna device comprises: a base; a first antenna PCB disposed on the base, and including a first radar transmitting unit; and a second antenna PCB disposed on the base, and including a second radar transmitting unit. The first and second radar transmitting units respectively transmit radar signals including a strong signal region and a weak signal region and a signal border therebetween. The average gain of signal strength of the strong signal regions is greater than 0 db, and the average gain of signal strength of the weak signal regions is less than 0 db. An intersection is formed by the signal border of the radar signals, and the shortest distance between the intersection and the second surface is between 30 mm to 80 mm.