Vehicle Antenna Device with Movable Element for Roof Rail Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Antenna devices fitted on vehicles with rooftop structures like roof rails experience radio wave interference, leading to potential interruptions in omnidirectional communication.
Innovation Solution
An antenna device with a moving antenna element and a controller that adjusts the antenna's position to minimize interference by the roof rails, using a moving part driven by a motor and belt system to change the antenna's orientation and position, thereby altering the radio wave characteristics until communication is restored.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the antenna device is fitted on a vehicle with rooftop structures like roof rails, then the antenna can be mounted on the vehicle roof, but radio wave interference occurs leading to communication interruptions
Solution Approach 1:
The antenna element is made movable rather than fixed, allowing it to dynamically adjust its position and orientation to avoid interference from roof rails. The moving part enables the antenna to change its spatial configuration in response to interference conditions, transforming a static mounting problem into a dynamic solution.
Solution Approach 2:
The system changes the spatial parameters (position and orientation) of the antenna element to alter radio wave transmission characteristics. By adjusting the antenna's location and angle, the system modifies how radio waves interact with the vehicle structure, thereby reducing interference and maintaining communication reliability.
2Device complexity
If the antenna element position is fixed, then the device structure is simple, but radio wave interference from roof rails cannot be avoided
Solution Approach 1:
The antenna element is made movable rather than fixed, allowing it to dynamically adjust its position and orientation to avoid interference from roof rails. The moving part enables the antenna to change its spatial configuration in response to interference conditions, transforming a static mounting problem into a dynamic solution.
3Reliability
If the antenna element is movable to avoid interference, then radio wave interference is suppressed, but the device complexity increases
Solution Approach 1:
The antenna element is made movable rather than fixed, allowing it to dynamically adjust its position and orientation to avoid interference from roof rails. The moving part enables the antenna to change its spatial configuration in response to interference conditions, transforming a static mounting problem into a dynamic solution.
Solution Approach 2:
The controller detects communication status and automatically adjusts the antenna element's position and orientation based on detected interference conditions. This closed-loop feedback system allows the antenna to autonomously optimize its configuration to maintain communication reliability while minimizing the need for complex manual intervention systems.
Data Source
AI summary
An antenna device includes an antenna element and a radio wave characteristic switching controller. The antenna element is fitted on a vehicle. The antenna element transmits and receives a radio wave. The radio wave characteristic switching controller changes, in case of an interruption of communication via the antenna element, a characteristic of the radio wave to be transmitted and received by the antenna element, until restoration of communication.