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Novel Platform for Droplet Detection and Size Measurement Using Microstrip Transmission Lines
Juliana de Novais Schianti1, Ariana L C Serrano2, Daniel Orquiza de Carvalho3
1Institute for Technological Research, São Paulo 05508-901, Brazil.
Sensors (Basel, Switzerland)
|December 5, 2019
Summary
We developed a new platform using microstrip transmission lines to detect and measure droplet size in microfluidic channels. This innovative design enhances electromagnetic field interaction for precise measurements of microscopic objects.
Area of Science:
- Electrical Engineering
- Microfluidics
- Microwave Engineering
Background:
- Microfluidic devices are crucial for various applications, but accurate droplet size measurement remains a challenge.
- Existing methods for droplet detection and sizing often lack precision or require complex setups.
Purpose of the Study:
- To introduce a novel platform for detecting and measuring individual droplet sizes in microfluidic channels.
- To leverage microstrip transmission lines for enhanced electromagnetic field interaction with droplets.
- To enable direct droplet size measurement from microwave signal phase without a resonator.
Main Methods:
- Fabrication of a microfluidic channel between the top strip and ground plane of a microstrip transmission line.
- Utilizing low temperature co-fired ceramic (LTCC) for platform construction, ensuring Radiofrequency (RF) and microwave compatibility.
- Measuring droplet size directly from the phase of the microwave signal.
Main Results:
- Successful detection and measurement of individual droplets as small as 150 µm in radius.
- Demonstrated enhanced interaction between the electromagnetic field and droplets due to the platform design.
- Validated the platform's capability for droplet size determination directly from microwave signal phase.
Conclusions:
- The proposed LTCC-based microstrip transmission line platform offers a novel and effective method for microfluidic droplet analysis.
- The design facilitates precise droplet size measurement and detection, with potential applications for other microscopic objects.
- This platform provides a compatible and advanced solution for RF and microwave-based microfluidic sensing.
