Multi-Directional Transmitting Antenna for Compact Radar Detection
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Solution Overview
Problem
Conventional radar apparatuses require a large size and increased parts, including multiple antennas, to achieve a wider angle range for detecting control-required, upper, and lower targets, leading to increased costs and limited mounting options on vehicles.
Innovation Solution
The use of four transmitting antennas that transmit waves in right-upward, left-upward, right-downward, and left-downward directions relative to a reference axis, allowing for a wider horizontal angle detection without a horizontal antenna, enabling a smaller radar apparatus design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If three types of antennas (horizontal, upper, lower) are used to detect targets at different vertical positions, then target detection capability is improved, but the radar apparatus size and installation area increase
Solution Approach 1:
Each transmitting antenna transmits transmission waves in multiple directions (upward and downward obliquely) to perform multiple detection functions. The same antenna structure is used for all four antennas, and each antenna contributes to detecting both upper targets and lower targets through its multi-directional transmission capability, eliminating the need for separate specialized antennas for each target type
Solution Approach 2:
The patent changes the transmission direction dimension by having antennas transmit obliquely upward and downward at specific angles (±15 to ±45 degrees) rather than horizontally. This angular dimension change allows a single antenna type to cover both upper and lower target detection spaces, reducing the need for multiple antenna types and installation areas
2Adaptability or versatility
If six antennas are used to cover a wider angle range in the width direction, then the horizontal detection angle is improved, but the radar apparatus size and parts quantity increase
Solution Approach 1:
Each of the four transmitting antennas transmits waves in multiple horizontal directions (left-upward, right-upward, left-downward, right-downward), making each antenna multi-functional for detecting targets across different horizontal angles. This eliminates the need for six separate antennas to achieve wide-angle coverage
Solution Approach 2:
The patent merges the functions of multiple antennas into four antennas by having each antenna transmit in multiple directions simultaneously. The transmission ranges of adjacent antennas overlap, creating a combined wide-angle coverage area that would otherwise require more separate antennas to achieve
3Adaptability or versatility
If more transmitting antennas are used to achieve wider coverage, then detection range is improved, but manufacturing cost increases
Solution Approach 1:
All four transmitting antennas use the same antenna structure and can be manufactured identically, reducing manufacturing complexity and cost. Each antenna serves multiple detection purposes (upper targets, lower targets, different horizontal angles), maximizing the utility of each manufactured unit and reducing the total number of parts required
Solution Approach 2:
The patent achieves wider detection range not by adding more antenna types but by changing the transmission angle parameter to oblique upward and downward directions (±15 to ±45 degrees). This parameter optimization allows four antennas to provide broader coverage than traditional horizontal transmission, reducing parts quantity while maintaining or improving detection capability
Data Source
AI summary
An antenna includes a plurality of transmitting antennas that are: a first transmitting antenna that transmits a transmission wave in a right-upward direction relative to a reference axis substantially parallel to a road surface; a second transmitting antenna that transmits a transmission wave in a left-upward direction relative to the reference axis; a third transmitting antenna that transmits a transmission wave in a right-downward direction relative to the reference axis; and a fourth transmitting antenna that transmits a transmission wave in a left-downward direction relative to the reference axis. A transmission range of the transmission wave transmitted from each of the first transmitting antenna, the second transmitting antenna, the third transmitting antenna and the fourth transmitting antenna partially overlaps with the transmission ranges of the transmission waves transmitted from the transmitting antennas located in vicinity.