Vehicle Locking Antenna Frequency Diversity
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Solution Overview
Problem
Existing electronic locking systems for vehicles require high transmission power to cover large areas, leading to increased battery costs and legal limitations, while also facing inefficiencies in signal transmission and security against unauthorized access.
Innovation Solution
The locking system employs differently arranged antennas operating on different frequency channels, using low-frequency wake-up signals and higher-frequency authentication signals to minimize power consumption and enhance security, allowing for efficient operation with reduced range and increased theft security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single antenna operates at high power to cover the entire transmission range, then the transmission coverage is sufficient, but the energy consumption increases and battery cost increases
Solution Approach 1:
The patent divides the single antenna system into multiple antennas (at least two) that are spatially separated and operate on different frequency channels. Each antenna covers a specific area or direction, and they work together to provide comprehensive coverage. This segmentation allows the system to reduce individual antenna power consumption while maintaining overall coverage area.
2Reliability
If transmission power is increased to improve signal quality, then the effective range is extended, but the system exceeds legal radio approval limits
Solution Approach 1:
The patent changes the operating parameters by using multiple frequency channels instead of a single high-power frequency. Each antenna operates on a different frequency channel, allowing the system to distribute the transmission power across multiple frequencies. This approach maintains signal quality and effective range while keeping individual transmission power levels within legal radio approval limits.
3Reliability
If multiple antennas are used to improve signal quality, then the transmission reliability increases, but the device complexity increases
Solution Approach 1:
The patent applies local quality by assigning different frequency channels to different antennas based on their spatial locations. Each antenna is optimized for its specific position and frequency channel, creating a diversified system where each component has a specialized function. This approach improves overall signal reliability through spatial and frequency diversity while managing complexity through structured assignment.
4Use of energy by moving object
If the transmission range is reduced to lower power consumption, then the energy efficiency improves, but the convenience for user operation decreases
Solution Approach 1:
The patent adds the frequency dimension to the antenna system by using multiple frequency channels alongside spatial distribution. This creates a two-dimensional diversity (space and frequency) that enhances signal coverage and reliability without requiring high power transmission. The system achieves extended effective range through constructive interference and frequency diversity, maintaining user convenience while improving energy efficiency.
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 approach enables the locking system to operate with significantly less transmission power, reducing energy consumption and overshoots, while maintaining effective range and security, thereby adhering to worldwide radio approval regulations and enhancing user convenience.
Implementation Method 1
For their intended operation, the two devices have transmitters and/or receivers for the transmission of the electromagnetic signals
Implementation Method 2
at least one signal can be transmitted between the key and the control device as a coded operating signal for authentication of the key
Data Source
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AI summary
The invention relates to a locking system (3) for a motor vehicle (1), in the manner of a keyless entry/go functionality, and comprises a first device (4), such as a control device for unlocking and/or locking the car doors (6) or the like, and an associated second device (5), in the form of an electronic key or the like. Both devices (4, 5) have transmitters and/or receivers especially for electromagnetic signals (7) for their intended use. The first device (4) is associated with an antenna (29, 30) for transmitting at least one of the signals (7). At least two different physical antennas (30,31) operating with two different frequency channels are provided for the first device (4), the one antenna (30,31) being operated in which the quality of the signal (7) received from the second device (5) meets a predetermined minimum requirement.