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Defects Detection Method Based on Programmable Spoof Surface Plasmon Polaritons in Non-Metallic Composites.

Jieping Wu1,2, Xiaoqing Yang1, Piqiang Su1

  • 1College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China.

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Summary

A new microwave nondestructive testing (NDT) method uses electronic scanning of a novel sensor to detect defects in non-metallic composites. This approach overcomes lift-off effects, improving detection sensitivity without moving the sensor.

Keywords:
asymptotic frequencydefect detection methodsplit ring resonator (SRR)spoof surface plasmon polaritons (SSPPs)

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Area of Science:

  • Materials Science
  • Electromagnetics
  • Nondestructive Testing

Background:

  • Microwave nondestructive testing (NDT) is valuable for non-metallic composites.
  • The lift-off effect typically reduces NDT sensitivity.
  • Existing methods often require sensor movement, limiting practical applications.

Purpose of the Study:

  • To develop a novel microwave NDT method to overcome lift-off effects.
  • To design a sensor capable of concentrating electromagnetic fields on defects.
  • To enable defect localization without physical sensor repositioning.

Main Methods:

  • Proposed a defect detection method utilizing electronic scanning instead of sensor movement.
  • Designed a novel sensor based on programmable spoof surface plasmon polaritons (SSPPs).
  • Integrated a varactor diode into the SSPPs sensor's split ring resonator (SRR) for tunable capacitance and field concentration.

Main Results:

  • The proposed electronic scanning method effectively reduced the lift-off effect.
  • The SSPPs sensor demonstrated the ability to concentrate electromagnetic fields on targeted areas.
  • Defect locations in non-metallic materials were accurately analyzed without moving the sensor.

Conclusions:

  • The developed electronic scanning technique and SSPPs sensor are effective for NDT of non-metallic composites.
  • This method offers enhanced sensitivity and precise defect localization.
  • The findings present a significant advancement for non-contact inspection technologies.