3D Wave-Absorbing Antenna Arrays for Interchannel Isolation
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Solution Overview
Problem
Conventional two-dimensional ground penetrating radar systems have low antenna density, slow detection speed, and low efficiency, which limits their ability to accurately detect millimeter-scale cracks in expressways due to inadequate interchannel isolation and time-domain characteristics of radio-frequency signals.
Innovation Solution
The implementation of three-dimensional special-shaped wave-absorbing structures in antenna arrays, which include an antenna array fixing plate with multiple units each containing a transmitting channel, two receiving channels, and paired three-dimensional special-shaped wave-absorbing structures to improve interchannel isolation and reduce environmental interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional two-dimensional ground penetrating radar is used, then device complexity is reduced, but detection precision and interchannel isolation deteriorate
Solution Approach 1:
The patent transitions from conventional two-dimensional antenna arrays to three-dimensional special-shaped wave-absorbing structures. This dimensional change enables better spatial isolation between antenna elements, improving interchannel isolation and detection precision by utilizing vertical and angular dimensions in addition to the horizontal plane.
Solution Approach 2:
The patent introduces wave-absorbing materials as intermediary substances between antenna elements. These materials act as mediators that absorb electromagnetic waves and prevent mutual interference between adjacent antenna channels, thereby improving detection precision without requiring excessive spacing that would increase device complexity.
2Productivity
If antenna density is increased to improve detection speed, then productivity is improved, but interchannel isolation deteriorates
Solution Approach 1:
By transitioning to three-dimensional wave-absorbing structures, the patent enables higher antenna density in the horizontal plane while maintaining isolation through vertical dimensionality. The special-shaped structures extend in the vertical direction, providing isolation between closely-spaced antenna elements without reducing detection speed.
Solution Approach 2:
The patent converts the potentially harmful electromagnetic interference between densely packed antenna elements into a beneficial isolation mechanism. Wave-absorbing materials are strategically placed to absorb stray electromagnetic energy, transforming what would be interference into useful signal separation, thereby enabling high antenna density with maintained interchannel isolation.
3Reliability
If three-dimensional special-shaped wave-absorbing structures are added, then interchannel isolation is improved, but device complexity increases
Solution Approach 1:
The patent divides the wave-absorbing structure into discrete modular units positioned between specific antenna elements. This segmentation allows the complex three-dimensional structures to be broken down into manageable components that can be systematically arranged, reducing overall device complexity while maintaining isolation performance.
Solution Approach 2:
The patent employs composite wave-absorbing materials that combine multiple properties (electromagnetic absorption, mechanical stability, and spatial efficiency) into a single integrated solution. This use of composite materials reduces device complexity by eliminating the need for multiple separate components while achieving the required interchannel isolation.
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 enhances interchannel isolation, improves the ringing effect of time-domain antenna radiation, and increases the signal-to-noise ratio, enabling accurate detection and identification of millimeter-scale cracks in expressways during high-speed detection.
Implementation Method 1
the pair of three-dimensional special-shaped wave-absorbing structures are used for isolating antenna signals of antenna transmitting channels of other antenna array units
Data Source
AI summary
Provided are antenna arrays based on three-dimensional special-shaped wave-absorbing structures by the disclosure, and includes an antenna array fixing plate and a plurality of antenna array units, where the antenna array units are sequentially fixed on the antenna array fixing plate; each of the plurality of antenna array units includes an antenna transmitting channel, two antenna receiving channels and a pair of three-dimensional special-shaped wave-absorbing structures; the antenna transmitting channel is used for transmitting antenna signals; the antenna receiving channels are used for receiving the antenna signals; and the three-dimensional special-shaped wave-absorbing structures are used for isolating antenna signals of antenna transmitting channels of other antenna array units.