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Open AccessReview

A Review of Microwave Thermography Nondestructive Testing and Evaluation

School of Electronic and Information Engineering, Fuqing Branch of Fujian Normal University, Fuzhou 350300, China
Department of Civil and Architecture Engineering, Changsha University, Changsha 410022, China
College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Electrical and Computer Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA
School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
Authors to whom correspondence should be addressed.
Sensors 2017, 17(5), 1123;
Received: 21 March 2017 / Revised: 18 April 2017 / Accepted: 10 May 2017 / Published: 15 May 2017
(This article belongs to the Special Issue Intelligent Sensing Technologies for Nondestructive Evaluation)
PDF [10220 KB, uploaded 22 May 2017]


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. View Full-Text
Keywords: infrared thermography; NDT; microwave thermography; volumetric heating; material infrared thermography; NDT; microwave thermography; volumetric heating; material

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Zhang, H.; Yang, R.; He, Y.; Foudazi, A.; Cheng, L.; Tian, G. A Review of Microwave Thermography Nondestructive Testing and Evaluation. Sensors 2017, 17, 1123.

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