Dual Antenna Contactless System for High-Baud Data Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing contactless communication systems face limitations in achieving high bit rate data transfer without compromising communication quality due to the high Q factor resonance circuit's narrow bandwidth, which attenuates data-modulated carrier signals and affects settling time.
Innovation Solution
The implementation of an additional data antenna with a low Q factor, separate from the energy antenna, allows for wideband data transmission by geometrically or electrically suppressing signal interactions, enabling the superposition of energy and data signals to achieve high baudrate communication without reducing quality factor Q.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a high Q factor resonance circuit is used in the transmission antenna, then energy transfer efficiency is improved, but bandwidth is reduced and data transmission capability deteriorates
Solution Approach 1:
The invention divides the transmission antenna into two separate antennas: an energy antenna with high Q factor resonance circuit for efficient energy transfer, and a data antenna with low Q factor for wideband data transmission. This segmentation allows each antenna to be optimized for its specific function without compromise.
Solution Approach 2:
The transmission system is designed to perform multiple functions simultaneously through two antennas: one dedicated to energy transfer and another to data transmission. This multi-functionality approach enables the system to achieve both high energy efficiency and high data rates without sacrificing either capability.
2Use of energy by moving object
If a high Q factor resonance circuit is used, then energy transfer is optimized, but signal attenuation increases and settling time is affected
Solution Approach 1:
By separating the energy antenna and data antenna, the invention eliminates the signal attenuation problem that occurs when a high Q factor circuit is used for both energy and data functions. The data antenna with low Q factor ensures proper signal transmission without the harmful attenuation effects.
Solution Approach 2:
Each antenna is given different quality characteristics suited to its function: the energy antenna has high Q factor for efficient energy transfer, while the data antenna has low Q factor for optimal signal transmission. This local quality differentiation resolves the conflict between energy optimization and signal quality.
3Speed
If bandwidth is increased for high data rates, then data transmission capability is improved, but quality factor Q must be reduced
Solution Approach 1:
The invention segments the transmission function into two separate antennas with different Q factor characteristics. The data antenna is specifically designed with low Q factor to provide wide bandwidth for high data rates, while the energy antenna maintains high Q factor for efficient energy transfer. This segmentation allows bandwidth expansion without compromising the quality factor where it matters for 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 high bit rate data transfer while maintaining communication quality by isolating the energy and data signals, allowing for efficient energy transfer and data transmission without bandwidth limitations.
Implementation Method 1
transmission antenna LPCD transmits a carrier signal, typically having a frequency of 13.56 MHz, which generates a transmission field to supply the contactless card 720 with both energy and data
Implementation Method 2
When contactless card 720 penetrates the transmission field of reader 710, the transmission field induces a current in card antenna LPICC, and the transmission antenna LPCD and card antenna LPICC are said to be coupled
Implementation Method 3
a voltage corresponding to the induced current is then multiplied by the resonance circuit
Data Source
AI summary
A contactless device having an energy antenna configured to transmit/receive an energy signal; and a data antenna configured to transmit a data signal. Also, a method for transmitting a contactless signal including transmitting/receiving an energy signal from an energy antenna of a contactless device; and transmitting a data signal from a data antenna of the contactless device.