Shaft Antenna Mechanical Decoupling for Vibration Isolation
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Solution Overview
Problem
Shaft antennas are prone to reduced service life due to mechanical coupling with vibrations from vehicles and pedestrians, which causes significant wear and tear.
Innovation Solution
A shaft antenna system with a separate cover plate that is mechanically decoupled from the antenna housing, where the cover plate is supported indirectly by a support frame, preventing vibrations from being transmitted to the antenna housing, and featuring a design that includes a support apparatus to secure the antenna housing within the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cover plate is directly coupled to the antenna housing, then the structure is simpler and easier to manufacture, but vibrations from vehicles and pedestrians are transmitted to the antenna housing, significantly reducing service life
Solution Approach 1:
The system is divided into separate components: a cover plate that closes the insertion opening and an antenna housing containing the antenna, which are mechanically decoupled from each other. The cover plate is supported by the support frame independently, while the antenna housing is held by a support apparatus, preventing vibration transmission and extending service life.
2Productivity
If the antenna housing is positioned close to ground level, then propagation range is improved, but the antenna housing is more exposed to vibrations from vehicles and pedestrians
Solution Approach 1:
The support frame acts as an intermediary structure that holds the antenna housing at ground level for optimal propagation while simultaneously providing mechanical decoupling from vibrations. The support frame supports the cover plate independently and holds the antenna housing via a support apparatus, preventing direct vibration transmission.
3Reliability
If a separate cover plate is introduced to decouple vibrations, then service life is increased, but the device complexity increases
Solution Approach 1:
The support frame serves multiple functions: it supports the cover plate that closes the insertion opening, holds the antenna housing via the support apparatus, and provides mechanical decoupling from vibrations. This multi-functionality reduces the need for additional separate components, managing device complexity while extending service life.
Data Source
AI summary
A shaft antenna system for mobile communication has an antenna housing and a supporting frame. The frame has a frame top side, a frame bottom side and an insertion opening located at the height of the frame top side. An accommodating space adjoins the insertion opening in which the antenna housing is arranged. The antenna housing has at least one supporting device for retaining the antenna housing within the supporting frame. A closing cover closes the insertion opening and the accommodating space. The closing cover is supported at the edge region of the closing cover at least indirectly on the supporting frame and covers a top side of the antenna housing by the inner face of the closing cover. The closing cover has a central region, the surface of which facing downward is at least 60% of the total inner surface of the closing cover facing downward, wherein the central region is arranged above the adjacent top side of the antenna housing without contact.