Vehicle Antenna Capacitance Loading Element Fixation
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Solution Overview
Problem
The capacitance loading element in conventional vehicle antennas is not firmly fixed to the capacitance loading element holder, leading to potential displacement and instability in electric performance due to vehicle vibrations.
Innovation Solution
An antenna device design that includes a capacitance loading element holder with an upper and lower holder to sandwich the capacitance loading element, along with a base that holds the lower holder, providing a secure fixation and reducing the likelihood of the capacitance loading element coming off or contacting the antenna case, thus preventing abnormal noise and maintaining consistent electric performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the capacitance loading element is held by a capacitance loading element holder in a conventional configuration, then the structure is simple, but the capacitance loading element is not firmly fixed and may be displaced by vehicle vibration
Solution Approach 1:
The patent transitions from a single-plane holding structure to a three-dimensional sandwich structure. The upper holder and lower holder clamp the capacitance loading element from opposite directions, creating fixation in multiple spatial dimensions. This dimensional change ensures the element cannot be easily displaced by vibration while maintaining structural simplicity.
Solution Approach 2:
The patent combines the upper holder and lower holder into an integrated capacitance loading element holder assembly. These components work together as a unified clamping mechanism, merging multiple holding functions into a single structured unit that provides stable fixation without requiring separate complex fastening systems.
2Reliability
If the capacitance loading element is not firmly fixed, then the device complexity is low, but the electric performance becomes unstable due to displacement
Solution Approach 1:
By implementing clamping from both upper and lower directions, the patent creates multi-dimensional constraint that prevents displacement in any direction. This ensures the capacitance loading element maintains its precise position relative to the antenna case, guaranteeing stable electric performance without requiring overly complex positioning mechanisms.
Solution Approach 2:
The upper holder and lower holder are designed to pre-clamp the capacitance loading element before operation. This preliminary fixation action ensures that vibration during vehicle operation cannot cause displacement, thereby maintaining consistent electric performance from the outset without requiring active adjustment mechanisms.
3Stability of the object's composition
If the capacitance loading element is sandwiched between upper and lower holders, then displacement is reduced, but the device complexity increases
Solution Approach 1:
The patent achieves position stability by adding the lower holder component to create vertical clamping, transforming a single-plane holding structure into a multi-dimensional sandwich structure. This dimensional enhancement prevents displacement effectively while keeping each individual holder component relatively simple in design.
Solution Approach 2:
The holding function is segmented into an upper holder and a lower holder, with each component having a specific clamping role. This segmentation allows each part to be structurally simple while the combined assembly provides comprehensive stabilization, avoiding the need for a single complex holding mechanism.
Data Source
AI summary
Provided is an antenna device for a vehicle capable of firmly fixing a capacitance loading element. An antenna device 1 for a vehicle includes: an antenna case 5; a capacitance loading element 20 housed in an internal space of the antenna case 5; a capacitance loading element holder 10 including an upper holder 11 and a lower holder 12 and configured to sandwich and hold the capacitance loading element 20 between the upper holder 11 and the lower holder 12; and a metal base 50 configured to hold the lower holder 12. The capacitance loading element 20 includes two elements and a connecting portion that connects the two elements, the connecting portion is provided at a position lower than upper edges of the two elements, the upper holder 11 holds the two elements, and the upper holder 11 and the lower holder 12 sandwich and hold the connecting portion.