Waveguide Antenna Frequency Split for Vehicle Radar Blind-Zone Coverage
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Solution Overview
Problem
Existing vehicle radar systems with omnidirectional monitoring capabilities have blind zones due to the boresight direction of antennas being set to incline towards the side, leading to decreased detection distance and angle accuracy, which increases safety risks and costs.
Innovation Solution
A waveguide antenna that separates electromagnetic waves into different frequencies and directs them in distinct boresight directions, allowing independent operation for side and rear detection without additional antennas, thus eliminating blind zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the boresight direction of the antenna is set to incline to the side of the vehicle, then lateral recognition capability is improved, but detection distance and angle accuracy in directions away from the boresight direction deteriorate
Solution Approach 1:
The antenna is divided into multiple independent radiating elements (first antenna element and second antenna element) that can be independently controlled. Each element has its own boresight direction optimized for specific detection zones, allowing simultaneous improvement of lateral recognition and angle accuracy without compromise
2Adaptability or versatility
If additional radars are mounted on the vehicle to eliminate blind zones, then detection coverage is improved, but cost and device complexity increase
Solution Approach 1:
A single antenna structure performs multiple functions by incorporating different radiating elements with distinct beam patterns. The first antenna element covers rear and side-rear zones while the second element covers side zones, enabling one antenna to replace what would traditionally require multiple separate radar units
Solution Approach 2:
The patent extends the functional capability of the antenna by adding a vertical dimension to the radiation pattern control. Different elements radiate in different vertical planes and horizontal directions, creating a three-dimensional detection coverage from a single antenna location rather than requiring multiple antennas at different positions
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 waveguide antenna effectively eliminates blind zones, enhances detection accuracy and range, reduces costs, and improves safety by independently guiding electromagnetic waves for side and rear detection.
Implementation Method 1
a base part including an accommodation portion that accommodates an integrated circuit and configured to separate an output of the integrated circuit into a first electromagnetic wave and a second electromagnetic wave having different frequencies from each other
Implementation Method 2
a waveguide part provided on the base part and including a first waveguide and a second waveguide that guide the first electromagnetic wave and the second electromagnetic wave in different directions
Implementation Method 3
a cover part provided to cover at least a part of the waveguide part and including a first directional surface to which the first electromagnetic wave is radiated and a second directional surface to which the second electromagnetic wave is radiated
Data Source
AI summary
A waveguide antenna includes a base part including an accommodation portion that accommodates an integrated circuit and configured to separate an output of the integrated circuit into a first electromagnetic wave and a second electromagnetic wave having different frequencies from each other; a waveguide part provided on the base part and including a first waveguide and a second waveguide that guide the first electromagnetic wave and the second electromagnetic wave in different directions; and a cover part provided to cover at least a part of the waveguide part and including a first directional surface to which the first electromagnetic wave is radiated and a second directional surface to which the second electromagnetic wave is radiated.