Vehicle Antenna Layout With Band-Specific Elevation Angles
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Solution Overview
Problem
Existing vehicle antennas struggle to efficiently transmit and receive radio waves across a wide frequency band due to limitations in antenna attachment, leading to suboptimal transmission and reception efficiency.
Innovation Solution
A vehicle antenna system with multiple antennas attached at varying elevation angles and shapes, including three-dimensional configurations, to optimize transmission and reception efficiency across different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single antenna is used for wide frequency band communication, then device complexity is reduced, but transmission and reception efficiency deteriorates across different frequency bands
Solution Approach 1:
The patent divides the wide frequency band communication function into multiple separate antennas, each optimized for specific frequency ranges. Instead of using one antenna for all frequencies, the system segments the frequency bands and assigns dedicated antennas to each segment, thereby improving transmission and reception efficiency for each band while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
Each antenna in the system is designed with specific local quality characteristics tailored to its target frequency band. The antennas have different structures, sizes, and radiation patterns optimized for their respective frequency ranges, allowing each component to perform at its best for specific conditions rather than compromising overall performance across all frequencies.
2Ease of manufacture
If antenna attachment position is fixed, then ease of manufacture is improved, but transmission power and reception sensitivity deteriorate due to limited optimal positions
Solution Approach 1:
The patent segments the vehicle body into multiple potential antenna attachment positions, allowing the system to select optimal locations for each antenna type. By providing multiple designated positions rather than a single fixed location, the system achieves both manufacturing ease through standardized mounting points and improved performance through strategic placement of different antennas at their optimal positions.
3Ease of operation
If antenna elevation angle is fixed, then ease of operation is improved, but transmission and reception efficiency deteriorates for different frequency bands
Solution Approach 1:
Each antenna is assigned a specific elevation angle optimized for its target frequency band, creating local quality optimization. Lower frequency antennas are positioned at smaller elevation angles while higher frequency antennas use larger elevation angles, allowing each component to operate at its optimal angle for maximum efficiency in its designated frequency range.
Solution Approach 2:
The system dynamically adapts the elevation angles of different antennas according to their respective frequency bands. Rather than using a uniform fixed angle for all antennas, the system employs varying elevation angles that are optimized for each frequency range, allowing the antenna system to dynamically match its configuration to the operational requirements of different frequency bands.
4Ease of manufacture
If traditional antenna shapes are used, then ease of manufacture is improved, but transmission and reception efficiency deteriorates for wide frequency bands
Solution Approach 1:
The patent applies different antenna shapes and structures tailored to specific frequency bands. Each antenna design incorporates local quality characteristics appropriate for its target frequency range, with simpler traditional shapes used where adequate and more specialized geometries employed where performance requirements demand them, balancing manufacturing considerations with optimized performance for each band.
Data Source
AI summary
A vehicle antenna system having high transmission and reception efficiency is provided. A vehicle antenna system includes an antenna that is attached to a vehicle and is capable of transmitting and receiving radio waves of a predetermined frequency band. The antenna is attached to the vehicle in such a way that an elevation angle of the antenna with respect to a horizontal plane becomes large in a predetermined angle range in accordance with the height of a communication frequency band.