Multi-Layer Coupling-Controlled Antenna for Longer RFID Read Range
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Solution Overview
Problem
Conventional RFID and biochip antennas suffer from limited recognition distance and low data transmission rates due to their size and energy loss issues, making them unsuitable for compact biochip applications and other near-range data transmission systems.
Innovation Solution
The development of multi-layer coupling-controlled ultra-compact antennas (MulCAT) with helical elements, utilizing ferrite cores and aligned current directions to enhance electromagnetic field addition and minimize energy losses, thereby improving antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional dipole or monopole antennas are used for biochip applications, then the antenna structure is simple, but the recognition distance is too short and data transmission rate is low
Solution Approach 1:
The patent transitions from conventional planar PCB antennas to three-dimensional helical antenna structures. The helical elements extend in multiple dimensions with specific pitch and radius parameters, creating a volumetric radiation pattern that significantly extends recognition distance compared to flat PCB traces while maintaining compact overall dimensions suitable for biochip applications.
Solution Approach 2:
The patent employs ferrite cores with specific permeability values (μr = 20-100) combined with helical conductive elements. This composite structure leverages the magnetic properties of ferrite to enhance electromagnetic field confinement and radiation efficiency, achieving extended recognition distance and improved data transmission rates without proportionally increasing device complexity.
2Length of moving object
If conventional coil antennas are used as biochip antennas, then the antenna is compact, but the recognition distance remains very short
Solution Approach 1:
The patent introduces ferrite cores as intermediary magnetic materials between the conductive helical elements and the surrounding environment. These ferrite cores with optimized permeability values act as magnetic flux concentrators and guides, reducing energy loss through improved magnetic coupling and extending the effective recognition distance without requiring excessive input power.
Solution Approach 2:
The patent systematically varies critical parameters including helical radius (0.5-2.0mm), pitch (0.2-0.5mm), number of turns (3-10), and ferrite core permeability (20-100) to optimize the balance between recognition distance and energy efficiency. These parameter adjustments enable compact dimensions while achieving extended operational range through enhanced electromagnetic field distribution.
3Productivity
If multi-layer helical antenna structures are implemented, then recognition distance and data transmission rate improve, but device complexity increases
Solution Approach 1:
The patent divides the antenna system into multiple functional layers, each with specific helical elements and ferrite core segments. This segmentation allows independent optimization of each layer for specific frequency ranges or transmission functions, enabling high data transmission rates through parallel or sequential operation of multiple elements while managing overall complexity through modular architecture.
Solution Approach 2:
The patent implements nested helical structures where smaller helical elements are positioned within or between larger helical elements across multiple layers. This nesting arrangement maximizes space utilization, allowing multiple radiating elements to coexist in a compact volume, thereby achieving high data transmission rates without proportionally increasing the external dimensions or manufacturing complexity.
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 MulCAT antennas achieve significantly improved recognition distance and data transmission rates, with gain and bandwidth enhancements, suitable for biochip applications, wearable devices, IoT, and large antenna array systems.
Implementation Method 1
utilizing ferrite cores and aligned current directions to enhance electromagnetic field addition
Implementation Method 2
utilizing ferrite cores and aligned current directions to enhance electromagnetic field addition
Data Source
AI summary
A multi-layer coupling-controlled antenna. A first and second spaced-apart radiating elements define a gap therebetween and each is responsive to a source signal. A third conductive element is disposed below and spaced apart from the first and second radiating elements and located to bridge the gap. An upper conductive element is disposed above and spaced apart from the first and second radiating elements. The upper conductive element comprises a single element or a plurality of spaced-apart conductive elements. A lower conductive element is disposed below and spaced apart from the third conductive element.