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A Review of Microwave Thermography Nondestructive Testing and Evaluation

Lookup NU author(s): Liang Cheng, Professor Gui Yun TianORCiD



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2017 by the authors. Licensee MDPI, Basel, Switzerland. Microwave thermography (MWT) has many advantages including strong penetrability, selective heating, volumetric heating, significant energy savings, uniform heating, and good thermal efficiency. MWT has received growing interest due to its potential to overcome some of the limitations of microwave nondestructive testing (NDT) and thermal NDT. Moreover, during the last few decades MWT has attracted growing interest in materials assessment. In this paper, a comprehensive review of MWT techniques for materials evaluation is conducted based on a detailed literature survey. First, the basic principles of MWT are described. Different types of MWT, including microwave pulsed thermography, microwave step thermography, microwave pulsed phase thermography, and microwave lock-in thermography are defined and introduced. Then, MWT case studies are discussed. Next, comparisons with other thermography and NDT methods are conducted. Finally, the trends in MWT research are outlined, including new theoretical studies, simulations and modelling, signal processing algorithms, internal properties characterization, automatic separation and inspection systems. This work provides a summary of MWT, which can be utilized for material failures prevention and quality control.

Publication metadata

Author(s): Zhang H, Yang R, He Y, Foudazi A, Cheng L, Tian G

Publication type: Review

Publication status: Published

Journal: Sensors

Year: 2017

Volume: 17

Issue: 5

Online publication date: 15/05/2017

Acceptance date: 10/05/2017

ISSN (electronic): 1424-8220

Publisher: MDPI AG


DOI: 10.3390/s17051123