Vehicle Antenna Assembly With EM Shielding for Low Signal Loss
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Solution Overview
Problem
The long coaxial cables connecting vehicle modems to antennas result in significant signal losses due to distance, necessitating the modem's proximity to the antenna to minimize interference and improve signal quality.
Innovation Solution
An antenna assembly with a metal base and top lid acting as an electromagnetic barrier, housing the modem and antenna elements, allowing for their proximity without interference, and replacing multiple coaxial cables with a single cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the modem is placed far from the antenna to prevent electromagnetic interference, then electromagnetic interference is reduced, but signal loss increases due to long coaxial cable length
Solution Approach 1:
The housing is divided into two separate sections: a first section containing the antenna elements and a second section containing the modem. These sections are separated by a partition wall that acts as an electromagnetic barrier, allowing the modem and antenna to be in close proximity while preventing electromagnetic interference between them.
Solution Approach 2:
A partition wall serving as an electromagnetic barrier is introduced between the modem and antenna sections. This intermediate structure allows both components to coexist in close proximity while blocking electromagnetic signals from interfering with each other, thus eliminating the need for long coaxial cables.
2Object-affected harmful factors
If multiple coaxial cables are used to connect modem and antenna, then electromagnetic interference is prevented, but device complexity and installation difficulty increase
Solution Approach 1:
Multiple coaxial cables are replaced with a single cable that connects both the first and second antenna elements to the modem. This consolidation reduces cable management complexity and installation difficulty while maintaining electromagnetic isolation through the partition wall design.
3Loss of energy
If the modem is placed in proximity to the antenna, then signal loss is reduced, but electromagnetic interference increases
Solution Approach 1:
The housing is divided into two separate sections: a first section containing the antenna elements and a second section containing the modem. These sections are separated by a partition wall that acts as an electromagnetic barrier, allowing the modem and antenna to be in close proximity while preventing electromagnetic interference between them.
Solution Approach 2:
A partition wall serving as an electromagnetic barrier is introduced between the modem and antenna sections. This intermediate structure allows both components to coexist in close proximity while blocking electromagnetic signals from interfering with each other, thus eliminating the need for long coaxial cables.
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 losses over cables, allows for quicker and safer installation, and extends coverage range by embedding the modem within the antenna housing, reducing the need for complex router upgrades.
Implementation Method 1
the top lid and the base act as an electro-magnetic barrier for the modem allowing the modem to be placed in proximity to the at least one antenna element without interference from electro-magnetic signals from the at least one antenna element
Implementation Method 2
a base composed of a metal material, the base comprising a body an interior surface, a sidewall and a plurality of heat dissipation elements extending from the interior surface
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An antenna assembly (25) comprising a base (60), a modem (50), a top lid (40) and a housing (30) is disclosed herein. The base (60) is composed of an aluminum material. The modem (50) is disposed on the base (60). The top lid (40) is for the base (60), and the top lid (40) comprises at least one antenna element (41) disposed on an exterior surface. The housing (30) covers the top lid (40) and the base (60). The top lid (40) acts as an electro-magnetic barrier for the modem (50). A communication cable (135) is connected to the modem (50) at one end and extending to and connected to a vehicle internal router (125) with a vehicle modem at the other end.