Horn Antenna Dielectric Insert Waveguide Channel
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Solution Overview
Problem
Existing radar wave guiding arrangements, such as horn antennas, face challenges in achieving a compact design while maintaining desired directional properties and broad angle radiation, particularly in vehicle radar systems where space is limited and high-frequency performance is required.
Innovation Solution
A radar wave guiding arrangement featuring a horn-shaped housing with a dielectric insert forming a waveguide channel, which provides different wave distribution characteristics, allowing for a compact design with broad angle radiation and desired directional properties, including ±70° azimuthal coverage, achieved by optimizing the dimensions and waveguide channel geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the horn antenna is made elongated to maintain directional properties, then the directional properties are improved, but the volume and ease of placement in vehicle are worsened
Solution Approach 1:
The patent changes the geometric parameters of the horn antenna by introducing a flared section with specific flare angles and a compressed section with reduced dimensions. This parameter optimization allows the antenna to achieve desired directional properties while reducing overall volume for vehicle integration.
Solution Approach 2:
The patent introduces a flared section that expands in certain dimensions while compressing in others. The flare angle and compression ratio are optimized to redirect energy distribution, achieving broad angle radiation in azimuth while maintaining compact overall dimensions suitable for vehicle installation.
2Stability of the object's composition
If the horn antenna is made elongated to maintain directional properties, then the directional properties are improved, but the ease of placement in vehicle is worsened
Solution Approach 1:
The patent optimizes geometric parameters including flare angle, compression ratio, and section lengths to achieve a compact form factor. These parameter changes reduce the antenna's elongation while maintaining directional performance, making it easier to install in vehicle environments with limited space.
Solution Approach 2:
The flared section design redistributes energy in specific dimensional directions, achieving broad azimuth coverage without increasing the antenna's length in the direction critical for vehicle placement. This dimensional optimization facilitates easier integration into vehicle structures.
3Volume of moving object
If the dimensions of the horn antenna are reduced to make it compact, then the volume is improved, but the directional properties are worsened
Solution Approach 1:
The patent carefully selects and optimizes parameters such as flare angle, compression ratio, and relative section lengths to maintain directional properties despite reduced overall volume. The flared section's geometric parameters are specifically tuned to preserve energy distribution characteristics while achieving compact dimensions.
Solution Approach 2:
The introduction of a flared section creates a dimensional transition that compensates for the reduced overall size. This flared geometry redirects and distributes energy appropriately, maintaining directional radiation patterns and broad angle coverage even though the antenna's overall volume is reduced for vehicle application.
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 solution enables a compact radar wave guiding arrangement with improved directional properties and broad angle radiation, suitable for vehicle radar systems, while integrating well with radome structures and maintaining performance at high frequencies like 77 GHz.
Implementation Method 1
The first walls and the second walls form at least one waveguide channel for guiding radar waves through the horn-shaped housing
Implementation Method 2
The insert and the at least one waveguide channel have different wave distribution characteristics
Data Source
Figure 1a~1b
Figure 2~3a
Figure 3b
AI summary
There is provided radar wave guiding arrangement (31, 41, 51, 61, 71, 81) for a vehicle radar system, comprising: a horn-shaped housing (38), the housing comprising first walls (32) enclosing a cavity; and a dielectric insert (35), the dielectric insert comprising second walls (32) and being positioned inside the cavity; wherein the first walls and the second walls form at least one waveguide channel (34) for guiding radar waves through the horn-shaped housing, and wherein the insert and the at least one waveguide channel have different wave distribution characteristics.