Spiral Antenna Branching for Contactless Data Device Tuning
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Solution Overview
Problem
The production of existing transponders is complex and costly, and they often struggle to be tuned into a specific resonant frequency range suitable for commercial use, such as 13.56 MHz, with high resonant frequencies being difficult to achieve or implement.
Innovation Solution
A contactless data transmission device with a spiral antenna conductor that splits into multiple branches outside the mounting area of the electronic component, allowing for easy adjustment of the resonant frequency by changing the layout of the antenna conductor, which reduces inductance and increases capacitance, enabling precise tuning to a predetermined frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional transponder structures are used, then data transmission function is achieved, but production complexity and cost increase
Solution Approach 1:
The antenna conductor run is segmented into multiple spiral windings with branching structures. Each spiral winding can be independently configured and the branching allows separate optimization of different antenna sections, simplifying the overall production process while maintaining functional complexity
Solution Approach 2:
The patent combines the antenna conductor run with the carrier as a single integrated structure. The antenna conductor is printed directly on the carrier surface, merging two previously separate components into one, thereby reducing production steps and lowering costs
2Adaptability or versatility
If traditional antenna designs are used, then basic data transmission is possible, but resonant frequency adjustment to specific ranges (e.g., 13.56 MHz) is difficult
Solution Approach 1:
The antenna conductor run employs a dynamic branching structure where spiral windings can be configured in different patterns and densities. This allows the resonant frequency to be dynamically adjusted to specific ranges like 13.56 MHz by modifying the spiral winding geometry without fundamentally changing the antenna design
Solution Approach 2:
The patent adjusts resonant frequency by changing physical parameters of the spiral windings including wire diameter, spacing between spirals, and number of turns. These parameter modifications enable precise frequency tuning while maintaining a relatively simple overall antenna structure
3Reliability
If high resonant frequencies are targeted, then better data transmission performance is achieved, but production and implementation become difficult
Solution Approach 1:
The patent uses multi-layer spiral windings arranged in different spatial dimensions on the carrier. By stacking spiral windings in multiple layers with specific spacing, high resonant frequencies are achieved through three-dimensional configuration rather than increasing complexity in a single plane, maintaining production ease
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 solution simplifies the production process, reduces costs, and allows for precise adjustment of the resonant frequency, making the device suitable for use in value and security documents while minimizing the risk of manipulation by delamination or separation of document layers.
Implementation Method 1
an antenna device, in particular a circuit element, which has a continuous antenna conductor run in the form of at least one spiral winding
Implementation Method 2
at least one electronic component, in particular a semiconductor circuit element, which is electrically connected to the circuit element and has at least two contact points
Data Source
Figure 1
Figure 2(a)~2(c)
Figure 3
AI summary
The invention is used to simplify the production of a contactless data-transmitting device 50. The device 50 has: an electrically insulating substrate 1; a circuit element which is arranged on the substrate 1 and which consists of a continuous antenna track 2 in the form of at least one spiral winding 4, 5, 6 and a terminal contact 15, 16 at each end of the track; and an electronic component 3 which is electrically connected to the circuit element and which comprises at least two contact points 11, 12. The electronic component 3 is placed over the at least one spiral winding 4, 5, 6 in a mounting region 10. Each of the at least two contact points 11, 12 of the component 3 is electrically connected to a terminal contact 15, 16 of the antenna track 2. At least one spiral winding 4, 5, 6 branches into at least two spiral winding branches 4', 4"; 5', 5"; 6', 6" between two branching points 7', 7"; 8', 8"; 9', 9" in each case, outside the mounting region 10. The data-transmitting device 50 is part of a value and/or security document 100.