Integrated Biosensor Antenna Resonator Design
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Solution Overview
Problem
Existing biosensors using split-ring resonators require external antennas for electrical excitation, which limits their portability and integration with electronic chips, and existing measurement methods require direct electrical connection, making them less suitable for oscillator integration and portable applications.
Innovation Solution
A biosensor design where split-ring resonators are integrated with antennas on the same substrate, excited by electromagnetic waves, allowing for measurement of resonant frequency shifts without direct electrical connection, enabling portable and oscillator-compatible biosensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external antennas are used for electrical excitation of SRR structures, then the resonator can be effectively excited, but the alignment of these antennas imposes an important limitation to realize portable sensors and integration with electronic chips
Solution Approach 1:
The patent merges the antenna and SRR structure into a single integrated unit. The antenna is directly patterned on the substrate in proximity to the SRR, eliminating the need for separate external antennas. This integration maintains effective excitation while enabling portable sensor realization and electronic chip compatibility.
2Ease of operation
If direct electrical connection to the resonator structure is used for measurement, then the measurement method is straightforward, but it is not advantageous to use the sensors as part of oscillators by integrating with electronic circuits
Solution Approach 1:
The integrated antenna-SRR structure serves multiple functions: it can be measured using traditional electrical connection methods while simultaneously being compatible with oscillator circuit integration. The antenna acts as both an excitation element and a connection interface, enabling the sensor to function in both measurement and oscillation modes.
3Reliability
If SRR structures with dimensions measured by millimeter and centimeters are used, then they work effectively in microwave frequency, but they are not suitable for portable applications and integration with electronic chips
Solution Approach 1:
The patent changes the dimensional parameters of the SRR structure from millimeter/centimeter scale to micrometer scale. This parameter change allows the structure to maintain its resonant functionality while becoming suitable for portable applications and electronic chip integration. The reduced dimensions enable miniaturization without sacrificing the fundamental resonant behavior.
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 integrated antenna-resonator design on a dielectric substrate with a metal backplate allows for efficient current induction and measurement of molecular concentration changes, facilitating portable biosensing and oscillator circuit integration with improved sensitivity and linear frequency response.
Implementation Method 1
When SRR structures are excited appropriately, the magnetic permeability becomes negative within the vicinity of the resonant frequency of the structure. The resonant frequency of the resonator is determined with the geometry of the structure.
Implementation Method 2
The said sensor is excited by means of the electric signal applied on the antennas which is converted into electromagnetic wave.
Implementation Method 3
The said sensor is excited by means of the electric signal applied on the antennas which is converted into electromagnetic wave.
Data Source
Figure 1~2a
Figure 2b~2c
Figure 3a~3c
AI summary
The present invention relates to a biosensor (1) which enables the concentration of a desired molecule inside a liquid in the medium, and essentially comprises at least one metallic plate (2) which functions as a ground plate, and which is preferably manufactured from aluminum, at least one dielectric substrate (3) which is located on top of the metallic plate (2), at least one split-ring resonator (4) which is realized on top of the dielectric substrate (3), and which is coated with a dielectric layer, at least two symmetrical antennas (5) which are realized on the same plane with the split-ring resonator (4) on the substrate (3), at least two ports (6) where a network analyzer is connected with the antennas (5) via SMA (SubMiniature Version A) connectors.