Staggered Radar Antenna Structure for Uniform Radiation Pattern
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Solution Overview
Problem
Conventional Taylor radar antennas for vehicles exhibit a large difference between maximum and minimum energy on the radiation field pattern, leading to distorted object detection.
Innovation Solution
An antenna structure design featuring a substrate, grounding surface, and an antenna module with specific configurations of micro strips, radiators, and coupling elements, where the radiators are staggeredly connected and widths are distributed using Taylor polynomial coefficients, ensuring uniform current distribution and reduced energy variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional Taylor radar antenna is used for vehicle short-range radar, then the antenna structure is simple and easy to manufacture, but the difference between maximum and minimum energy on radiation field pattern is large causing object distortion
Solution Approach 1:
The antenna array is divided into multiple radiating elements with different widths, where each element is segmented according to Taylor polynomial coefficients. This segmentation allows independent control of each element's radiation characteristics to achieve uniform overall radiation pattern while maintaining manageable structural complexity
Solution Approach 2:
Different radiating elements are assigned different local qualities (widths) based on Taylor polynomial coefficients. Elements closer to the center have different widths than those at the edges, creating local variations that collectively produce uniform radiation field pattern across the entire antenna aperture
2Manufacturing precision
If radiator widths are uniformly distributed, then the antenna structure is simple to design, but the current distribution is non-uniform causing energy variation in radiation pattern
Solution Approach 1:
The radiator width parameter is changed according to Taylor polynomial coefficients rather than being uniformly distributed. This parameter variation along the antenna aperture creates the desired non-uniform current distribution that results in uniform radiation field pattern, achieving high manufacturing precision through mathematical parameter optimization
3Measurement precision
If the antenna aims to reduce energy difference in radiation pattern, then detection accuracy improves, but the antenna design complexity increases
Solution Approach 1:
The Taylor polynomial coefficients are calculated and applied in advance during the antenna design phase to determine the optimal width distribution of radiating elements. This preliminary action ensures that the antenna is pre-configured to produce uniform radiation pattern, thereby improving object detection accuracy before actual operation without requiring complex real-time adjustments
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 a small difference between maximum and minimum energy on the radiation field pattern, enhancing detection accuracy and performance across a broadband frequency range.
Implementation Method 1
antenna module with specific configurations of micro strips, radiators, and coupling elements, where the radiators are staggeredly connected and widths are distributed using Taylor polynomial coefficients, ensuring uniform current distribution and reduced energy variation
Data Source
AI summary
An antenna structure includes a substrate, a grounding surface and an antenna module. The substrate includes a first surface and a second surface. The antenna module is disposed on the second surface and includes a feeding point, a micro strip, n radiators and n coupling elements. The micro strip extends along a first axial direction and includes a first end, a second end, a first segment and a second segment. A width of the first segment is smaller than a width of the second segment. The n radiators are staggeredly connected to two sides of the micro strip along the first axial direction. The widths of the n radiators from the first end to the second end along the first axial direction are increased first and then decreased. The n coupling elements are separated from the micro strip and the n radiators.