Antenna Module Dynamic Switching for Vehicle Signal Routing
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Solution Overview
Problem
Existing antenna systems in vehicles face challenges in efficiently coupling multiple antennas operating in the same frequency range, leading to complex constructions and performance issues when providing various radio services over long ranges.
Innovation Solution
A method and antenna module that utilize a controllable switch to dynamically route signal inputs to either an external or internal antenna based on detectable events, such as the presence of an authorized person, allowing for the prioritization of services like mobile telephone and E-call, thereby simplifying construction and improving system performance by eliminating the need for multiple antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used to support different radio services, then service functionality is improved, but device complexity and construction effort increase
Solution Approach 1:
The patent applies multi-functionality by enabling a single antenna to serve multiple radio services (mobile telephone, GPS, SDARS, DAB, WLAN) through dynamic switching. The antenna system can be configured via control signals to support different services at different times, eliminating the need for separate dedicated antennas for each service while maintaining full functionality.
Solution Approach 2:
The patent implements dynamics through time-division multiplexing and dynamic switching of the antenna between different services. The antenna's function changes over time based on service requirements, with a controllable switch routing signals to the antenna only when needed for specific services, allowing adaptive configuration rather than static dedicated assignments.
2Device complexity
If antennas are coupled to share resources, then device complexity is reduced, but coupling problems arise when antennas are at small distances
Solution Approach 1:
The patent resolves coupling problems by dynamically switching the antenna between different services rather than permanently coupling multiple antennas. The controllable switch ensures that only one service uses the antenna at a time, preventing interference between services while maintaining construction simplicity. This temporal separation eliminates the coupling issues that would arise from spatial proximity of multiple active antennas.
Solution Approach 2:
The patent introduces a controllable switch as an intermediary between the signal sources and the antenna. This switch acts as a mediator that selectively connects different service signals to the antenna based on current service requirements, preventing direct coupling between multiple service signals and the antenna system, thereby avoiding interference while maintaining simple construction.
3Device complexity
If a single antenna is used for multiple services, then construction complexity is reduced, but service performance may deteriorate due to signal interference
Solution Approach 1:
The patent maintains signal transmission quality by dynamically assigning the single antenna to one service at a time through controllable switching. Rather than allowing simultaneous multi-service operation that would cause interference, the system activates the antenna only for the currently required service, ensuring optimal performance for each service while maintaining construction simplicity.
Solution Approach 2:
The patent employs periodic action through time-division multiplexing where the antenna is activated in periodic cycles for different services based on their requirements. The controllable switch periodically connects the antenna to different service signals as needed, ensuring each service receives adequate signal quality while the antenna remains idle or inactive between activations, preventing interference.
Data Source
AI summary
In a method for transmitting and/or receiving signals for at least one first and one second different service, particularly having a large range in a vehicle, at least one first antenna 25′ transmits and/or receives signals for the at least one first or second service, depending on a detectable event, and an antenna module performs this method.