High throughput and label-free particle sensor based on microwave resonators

Tzung Tsuen Tsai, Ying Chih Fang, Shin Kuan Wu, Ren Hao Chang, Wei Chen Chien, Yu Han Chang, Cen Shawn Wu, Watson Kuo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We developed a novel particle sensor based on micro channels embedded in microwave resonators, which are fabricated by standard print circuit board manufacturing technology. The sensing frequency falls in the range 2–4 GHz, the widely used microwave S band. A 70 μm-particle can produce a frequency shift of 0.5 MHz in a sensor with 150 μm channel size, with a dwell time of 0.5 ms by using double split ring resonators. These resonator sensors may employ phase-locked loop in achieving a higher detection resolution.

Original languageEnglish
Pages (from-to)652-658
Number of pages7
JournalSensors and Actuators, A: Physical
Publication statusPublished - 2019 Jan 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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