Nested Helical RFID Antenna for Compact Long-Range Biochips
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Solution Overview
Problem
Conventional RFID antenna technologies, such as dipole or monopole antennas, are inadequate for biochip applications due to their large size and limited recognition distance, which restricts effective data transmission.
Innovation Solution
The development of multi-layer coupling controlled ultra-compact antennas (MulCAT antennas) that utilize ferrite cores and helical-shaped elements to enhance mutual coupling and radiation, thereby improving antenna performance and recognition distance.
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 the antenna size is too large for biochip integration
Solution Approach 1:
The patent implements a multi-layer nested helical structure where smaller helical elements are positioned within and between larger helical elements across multiple layers. This nesting approach enables the antenna to achieve enhanced radiation performance and extended recognition distance while maintaining an ultra-compact size suitable for biochip integration, directly resolving the contradiction between antenna size and recognition distance
Solution Approach 2:
The patent transitions from planar 2D antenna structures to three-dimensional multi-layer helical configurations. By stacking multiple helical layers in the vertical dimension and utilizing spatial positioning, the antenna achieves improved radiation characteristics and extended recognition distance without increasing the planar footprint, thereby resolving the size versus performance contradiction
2Reliability
If conventional coil antennas are used as biochip antennas, then the antenna can be integrated into biochips, but the recognition distance remains very short
Solution Approach 1:
The patent divides the antenna into multiple discrete helical elements arranged in separate layers, with each element contributing to the overall radiation pattern. This segmentation allows for optimized current distribution and enhanced mutual coupling between elements, extending recognition distance while maintaining manageable structural complexity through modular design
Solution Approach 2:
The patent employs composite structures combining conductive materials for helical elements with dielectric materials for layer separation and support. This composite approach enables precise control of electromagnetic field distribution, improving radiation efficiency and recognition distance while maintaining structural integrity and manageable complexity
3Reliability
If multi-layer helical structures are used to improve radiation, then the recognition distance increases, but the antenna structure becomes more complex
Solution Approach 1:
The patent implements a nested multi-layer helical structure where inner and outer helical elements are positioned in concentric arrangements across multiple layers. This nesting provides inherent structural organization that simplifies inter-layer coupling and current distribution, achieving enhanced data transmission efficiency while the self-organizing nested geometry reduces overall structural complexity
Solution Approach 2:
The patent designs the multi-layer helical structure to simultaneously perform multiple functions: radiation generation, impedance transformation, and current distribution optimization. This multi-functionality reduces the need for additional separate components, thereby improving data transmission efficiency while keeping the overall structure integrated and relatively simple
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 significant improvements in antenna performance, including increased recognition distance and data transmission efficiency, making them suitable for biochip applications and other near-range data transmission needs.
Implementation Method 1
The MulCAT antennas achieve significant improvements in antenna performance, including increased recognition distance and data transmission efficiency
Implementation Method 2
The development of multi-layer coupling controlled ultra-compact antennas (MulCAT antennas) that utilize ferrite cores and helical-shaped elements to enhance mutual coupling and radiation
Data Source
AI summary
An antenna. The antenna includes a first helical winding and a second helical winding interleaved with the first helical winding such that a field generated by the first helical winding and a field generated by the second helical winding are additive. The first and second helical windings presenting a first diameter. In another embodiment the antenna further comprises a third and fourth helical windings presenting a second diameter greater than the first diameter. The first and second helical windings disposed within an opening defined by the third and fourth helical windings.