Mixed-Structure EBG Antenna Layout for Backlobe Suppression
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Solution Overview
Problem
The attenuation characteristics of electromagnetic waves using existing EBG elements are insufficient, leading to reduced backlobe suppression effects.
Innovation Solution
The antenna device incorporates a combination of EBG elements with different structures, including first and second EBG elements with distinct parameters such as patch size and interval, to enhance attenuation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single type of EBG element is used, then the device complexity is low, but the attenuation characteristics are insufficient
Solution Approach 1:
The patent applies local quality by using different types of EBG elements (first EBG elements and second EBG elements with different structures) at different locations around the antenna element. Specifically, the first EBG elements are positioned in a first region and the second EBG elements are positioned in a second region, with each type having optimized structural parameters for its specific location to achieve superior overall attenuation characteristics
Solution Approach 2:
The patent employs composite materials principle by combining multiple types of EBG elements with different structures (different patch sizes, different intervals, different configurations) to create a composite EBG structure. This composite approach leverages the complementary attenuation characteristics of each EBG type to achieve broader and more effective electromagnetic wave attenuation than any single EBG type could provide alone
2Object-affected harmful factors
If EBG elements are added to improve attenuation, then the backlobe suppression improves, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the EBG structure into multiple discrete EBG elements arranged in specific regions around the antenna element. The first EBG elements and second EBG elements are segmented into different spatial zones (first region and second region), allowing independent optimization of each segment's structural parameters to suppress backlobe radiation effectively
Solution Approach 2:
The patent implements local quality by tailoring the structural parameters of EBG elements to specific locations. The first EBG elements in the first region have different structural characteristics compared to the second EBG elements in the second region, with each location's EBG elements optimized for the local electromagnetic field distribution to maximize backlobe suppression while minimizing overall complexity
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
This configuration improves attenuation bandwidth and amount, effectively suppressing backlobes and enhancing the performance of radar devices by increasing main beam energy for improved ranging and positioning accuracy.
Implementation Method 1
an electromagnetic band gap (EBG) element is used to attenuate an electromagnetic wave
Data Source
AI summary
An antenna device (1) includes an antenna element (6) and a plurality of EBG elements (10), in which the plurality of EBG elements (10) includes a plurality of first EBG elements (11) and a plurality of second EBG elements (12) having a structure different from a structure of the plurality of first EGB elements (11).