Adaptive Antenna Module With Selective Emission Cavities
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Solution Overview
Problem
Vehicles require an antenna capable of generating different beam patterns to effectively communicate with external devices under varying traffic conditions and distances, as existing antennas do not adapt to changing communication distances and traffic conditions.
Innovation Solution
An antenna design featuring first and second conductive plates with a dielectric in between, and via holes forming emission cavities, along with a feeder circuit and ground plates, allowing for the generation of distinct beam patterns by activating either the first or second emission cavities based on reception signal strength, enabling adaptive beam pattern adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single antenna structure is used, then the device complexity is reduced, but the adaptability to different communication distances and traffic conditions deteriorates
Solution Approach 1:
The antenna structure is divided into multiple independent emission cavities (first emission cavity and second emission cavities) that can be selectively activated. Each cavity generates a different beam pattern, allowing the antenna to adapt to various communication distances and traffic conditions by activating only the necessary cavities, thus maintaining adaptability while controlling complexity.
Solution Approach 2:
The antenna incorporates dynamic switching capability through feeder circuits that can selectively activate different emission cavities based on communication requirements. This dynamic activation allows the beam pattern to change according to traffic conditions and distance, providing adaptability without requiring multiple complete antenna structures.
2Adaptability or versatility
If multiple emission cavities are added to generate different beam patterns, then the adaptability improves, but the device complexity increases
Solution Approach 1:
Multiple emission cavities are integrated within a single antenna structure that shares common components including the dielectric layer, via holes, and ground plates. This merging approach allows different beam patterns to be generated while minimizing the increase in overall device complexity by reusing structural elements across multiple cavities.
Solution Approach 2:
The antenna structure is designed with multi-functionality where a single unified structure serves multiple purposes: generating different beam patterns, adapting to various communication distances, and maintaining consistent performance across different traffic conditions. The shared components perform multiple functions simultaneously.
3Reliability
If via holes are placed closer together, then the emission cavity efficiency improves, but the manufacturing precision requirements increase
Solution Approach 1:
The design specifies optimal spacing parameters for via holes (distance shorter than 0.1 times the wavelength) that balance performance and manufacturability. By carefully selecting this parameter range, the antenna achieves reliable emission cavity performance while maintaining feasibility for standard manufacturing processes.
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 antenna module effectively communicates with vehicles by switching between beam patterns based on signal strength, ensuring optimal communication range and quality regardless of distance and traffic conditions, enhancing communication efficiency and reliability.
Implementation Method 1
a dielectric disposed between the first and second conductive plates
Implementation Method 2
a first feeder circuit which transmits a radio frequency (RF) signal to the first emission cavity
Data Source
AI summary
An antenna includes first and second conductive plates disposed to face each other, a dielectric disposed between the first and second conductive plates, and a plurality of via holes which penetrate the first and second conductive plates and the dielectric. A first emission cavity and a plurality of second emission cavities which emit radio waves are formed by the plurality of via holes and the first and second conductive plates.