Vehicle Antenna Assembly With EM Shielding and Single-Cable Routing
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Solution Overview
Problem
In vehicle wireless communication systems, the long coaxial cables connecting modems to antennas result in signal losses due to their length, necessitating the placement of modems in proximity to antennas to minimize interference and improve signal quality.
Innovation Solution
A wireless communication assembly for vehicles that includes a base, modem, top lid, and housing, where the modem is positioned on heat dissipation elements within the base, and the top lid acts as an electro-magnetic barrier, allowing the modem to be placed close to antennas without interference, using a single communication cable to connect the modem to the vehicle internal router, thereby reducing signal loss and replacing multiple coaxial cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the modem is placed far from the antenna, then electromagnetic interference from the modem is prevented, but signal loss increases due to long coaxial cable length
Solution Approach 1:
The antenna assembly is segmented into distinct functional components: the modem is housed in a separate base unit with electromagnetic shielding, while the antenna elements are mounted on a top lid. This segmentation allows the modem to be positioned close to the antenna without direct electromagnetic interference, as the shielding divides the space into isolated zones. The coaxial cable length is minimized by this close proximity arrangement while the shielding prevents the harmful electromagnetic interaction.
Solution Approach 2:
An electromagnetic shield (barrier) is introduced as an intermediary between the modem and the antenna. This shield acts as a mediator that blocks electromagnetic signals from the modem while allowing the physical proximity needed to minimize cable length. The shield creates an electromagnetic barrier that prevents interference without requiring the modem to be physically distant from the antenna.
2Object-affected harmful factors
If multiple coaxial cables are used to connect modem and antenna, then electromagnetic interference is reduced, but device complexity and installation difficulty increase
Solution Approach 1:
The modem and antenna are merged into a single integrated assembly unit. Instead of using multiple separate coaxial cables to achieve isolation, the design combines both components in one housing with internal electromagnetic shielding. This merging reduces the system to a single unit that connects to the vehicle's router via one cable, simplifying the overall cable configuration while maintaining electromagnetic isolation through the integrated shield.
Solution Approach 2:
The antenna assembly serves multiple functions within a single integrated unit: it provides both the antenna elements for signal reception and the modem for signal processing, while the housing provides electromagnetic shielding. This multi-functionality eliminates the need for separate cable management systems and multiple connection points, reducing device complexity while maintaining interference protection.
3Loss of energy
If the modem is placed close to the antenna, then signal loss is minimized, but electromagnetic interference from the modem affects the antenna
Solution Approach 1:
The housing structure provides localized electromagnetic shielding specifically around the modem compartment. This local quality approach applies shielding only where needed (around the modem) rather than requiring complete separation or multiple cables throughout the entire system. The shielded base allows close proximity while the localized shield prevents interference in the specific region where the modem operates.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration eliminates signal loss over cables, allows the modem to operate in proximity to antennas, and simplifies installation by reducing the need to remove and replace existing routers, while maintaining electro-magnetic signal integrity and extending coverage range.
Implementation Method 1
The top lid and base act as an electro-magnetic barrier for the modem
Implementation Method 2
a plurality of heat dissipation elements extending from the interior surface. The modem is disposed within the base and on the plurality of heat dissipation elements
Data Source
AI summary
A method and system for activating and deactivating a communication module for an apparatus is disclosed herein. The method includes monitoring a power activity state for the apparatus, monitoring a power activity state for a router for the apparatus, and maintaining an activation state for the communication module as long as the power activity state of the apparatus or the router is active.