WAVE Antenna EBG Structures Suppress Surface Wave Interference
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Solution Overview
Problem
Existing WAVE antennas mounted on vehicle roofs experience performance degradation due to radio wave interference from the vehicle's metal surface and roof shape, leading to reduced electric field strength and communication efficiency.
Innovation Solution
The antenna incorporates electromagnetic bandgap structures on a dielectric substrate with conduction patterns and unit cells, which are strategically positioned to reduce surface wave radiation and interference, enhancing communication performance by controlling electromagnetic wave propagation and minimizing mutual coupling between antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the WAVE antenna is mounted on the vehicle roof to maximize communication performance, then the electric field strength increases, but radio wave interference is generated by surface wave according to mount position and roof shape causing performance degradation
Solution Approach 1:
The patent introduces an electromagnetic bandgap (EBG) structure as an intermediary element between the antenna and the vehicle roof. This EBG structure acts as a mediator that suppresses surface wave propagation, thereby reducing radio wave interference caused by the metal roof while maintaining the antenna's communication performance. The EBG structure is formed by periodic arrangements of conductive patterns on the antenna substrate, creating bandgap frequencies that block harmful surface waves.
2Adaptability or versatility
If the WAVE antenna is installed in an integrated type or solely on an iron beam such as a traffic light, then installation flexibility is improved, but radio wave interference factor is generated causing performance degradation
Solution Approach 1:
The electromagnetic bandgap structure serves as a universal intermediary solution that can be integrated into various installation configurations. Whether the antenna is mounted on a vehicle roof, traffic light pole, or other infrastructure, the EBG structure suppresses surface wave interference generated by nearby metal surfaces, enabling flexible installation while maintaining performance.
Solution Approach 2:
The patent modifies the antenna structure by incorporating periodic conductive patterns (EBG structures) that change the electromagnetic parameters of the antenna system. These periodic structures create stopband frequencies that block surface wave propagation, thereby reducing interference without affecting the antenna's fundamental operating parameters such as resonant frequency and radiation pattern.
3Reliability
If electromagnetic bandgap structures are added to reduce surface wave radiation and interference, then communication performance is improved, but device complexity increases
Solution Approach 1:
The electromagnetic bandgap structure is implemented by dividing the antenna substrate into periodic unit cells, each containing conductive patterns that collectively create the EBG effect. This segmentation approach allows the complex interference suppression function to be achieved through simple, repeating geometric patterns, making the design more manageable and manufacturable despite the enhanced functionality.
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 significantly improves reflection loss and radiation patterns, increasing electric field intensity and communication range, while reducing interference and surface wave radiation, thereby enhancing the overall performance of WAVE communication antennas.
Implementation Method 1
a plurality of electromagnetic bandgap structures positioned on the first surface of the dielectric substrate and conducted to the plurality of second patches or the third patch by a through hole
Data Source
AI summary
Disclosed herein is an antenna for WAVE communication, and more particularly, is an antenna for WAVE communication to which an electromagnetic bandgap is applied to a patch antenna. The antenna includes a dielectric substrate provided with conduction patterns formed on opposite surfaces thereof, first patches disposed on a first surface of the dielectric substrate at positions spaced apart from each other at regular intervals and conducted to each other, second patches disposed on a second surface of the dielectric substrate at positions spaced apart from each other at regular intervals and conducted to each other; a third patch provided in a bottom of the second surface of the dielectric substrate and conducted to the plurality of second patches, and a plurality of electromagnetic bandgap structures positioned on the first surface of the dielectric substrate and conducted to the second patches or the third patch by a through hole.