Stacked Dipole Vehicle Antenna for Front-Rear V2V Gain
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Solution Overview
Problem
Monopole antennas installed on vehicles have reduced gain in the front-rear direction, which is crucial for V2V communication, and are susceptible to interference from other media antennas.
Innovation Solution
An antenna device featuring a stacked dipole antenna unit with dipole antennas arranged vertically and parallel to the vehicle's front-back direction, optimized by adjusting the height and distance of feeding points, and optionally incorporating wave directors to enhance gain in specific directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a monopole antenna is used, then the size of the antenna device is reduced, but the gain in the front-rear direction is reduced
Solution Approach 1:
The antenna device divides the single monopole antenna into multiple dipole antennas arranged in a specific configuration. Each dipole antenna contributes to the overall radiation pattern, creating constructive interference in the front-rear direction while maintaining a compact form factor suitable for vehicle installation.
Solution Approach 2:
Multiple dipole antennas are combined in a stacked configuration where their individual radiation patterns merge to create an enhanced overall pattern. The specific arrangement and spacing of dipoles are designed to produce constructive interference in the front-rear direction, achieving higher gain without proportionally increasing the device volume.
2Adaptability or versatility
If a monopole antenna is used, then the antenna can be installed in combination with other media antennas, but it is susceptible to interference from other media antennas
Solution Approach 1:
The patent transitions from a single vertical monopole antenna to a three-dimensional stacked dipole configuration. This spatial arrangement in multiple dimensions allows the antenna to maintain compatibility with other media antennas while the specific geometric configuration provides interference rejection through directional radiation patterns and polarization characteristics.
3Object-affected harmful factors
If a sleeve antenna is used, then susceptibility to other media antennas is reduced, but gain in the front-rear direction is insufficient
Solution Approach 1:
The patent applies different characteristics to different parts of the antenna system. The dipole antennas are configured with specific orientations and spacing that create localized radiation enhancement in the front-rear direction while maintaining overall resistance to interference from other media antennas through the distributed configuration.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
An antenna device (1) configured to be installed in a vehicle includes a stacked dipole antenna unit (40). The stacked dipole antenna unit has a plurality of dipole antennas (dl, d2) that are arranged parallel to a plane perpendicular to a front-back direction of the vehicle.