Signal Adapter for Bidirectional Data Transmission to Security Modules
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Solution Overview
Problem
Existing methods for data transmission to security modules via contactless communication are error-prone due to unidirectional communication limitations.
Innovation Solution
A device with a transformation unit using primary and secondary windings, and a BALUN circuit for bidirectional data transmission via antenna connections, allowing simultaneous data transfer to multiple security modules on a common carrier with reduced coupling and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless signal transmission to smart cards is used, then data transmission is achieved, but error rate increases due to unidirectional communication limitations
Solution Approach 1:
The patent introduces an adapter as an intermediary device that bridges the contactless reader and the smart card. The adapter receives the contactless signal, transforms it into a contact-based signal, and transmits it to the smart card via antenna connectors. This intermediary enables bidirectional communication by facilitating signal conversion between different communication modes, thereby improving reliability while managing complexity.
Solution Approach 2:
The patent replaces the purely wireless (electromagnetic) communication system with a hybrid system that incorporates physical contact through the adapter. By substituting part of the wireless transmission with contact-based signal transfer through antenna connectors, the system achieves more reliable bidirectional communication while reducing errors associated with unidirectional wireless protocols.
2Productivity
If contactless communication is used, then data transmission to security modules is achieved, but coupling and interference increase
Solution Approach 1:
The adapter serves as a mediator that isolates the contactless reader from the smart card electrically. By converting the contactless signal to a contact-based signal through controlled impedance matching and shielding in the adapter, harmful coupling and interference are reduced while maintaining efficient data transmission.
Solution Approach 2:
The patent extracts the signal transformation function from the direct communication path between reader and smart card. By placing the transformation unit in a separate adapter device, the harmful effects of direct electromagnetic coupling are eliminated, and only the necessary data transmission function remains in the wireless path.
3Measurement precision
If individual smart cards are contacted separately, then precise data transmission is achieved, but time consumption increases
Solution Approach 1:
The patent merges multiple individual contactless communication channels into a single contact-based communication path through the adapter. By combining the signal transmission for multiple smart cards through the adapter's antenna connectors, precise data transmission is achieved simultaneously for multiple cards, reducing the time required compared to sequential individual communication.
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
The solution enables reliable, bidirectional data communication with reduced errors and increased compactness, allowing for efficient data transfer to multiple security modules on a common carrier, enhancing the reliability and efficiency of data transmission.
Implementation Method 1
The transformation unit comprises primary windings, a common transformation core, and secondary windings
Implementation Method 2
The transformation unit is designed as a balun circuit. Balun stands for balanced-unbalanced
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Method and apparatus (30, 100) for the transmission of data to security modules (11) comprising antenna connections (12A, 12B) provided for contactless communicating data carriers (10). The apparatus (30, 100) comprises a signal input (38A, 38B) for an antenna signal of a contactless read device (39), a transformation unit (33) which transforms the incoming antenna signal into an outgoing antenna signal for the security element, and a signal output (32A, 32B) for the outgoing antenna signal which can be transmitted via contact to the antenna connections (12A, 12B) of the security module.