@inproceedings{e6fe6c8c99a846eaaf6f77c0f396f8d2,
title = "Hilbert-Curve Array Sensor for Nondestructive Testing of CFRP Composites",
abstract = "A novel Hilbert-curve (HC) based microwave nondestructive testing (NDT) array sensor is presented for carbon fiber-reinforced polymer (CFRP) composites. The proposed sensor is designed on a cost-effective Rogers RT5880 by using second order Hilbert-curve. The transmission coefficient (S21) response and electric field distribution are examined. The result works as a bandstop filter when cracks are present and bandpass filter when cracks are absent within the sensing band for the sample-under-test (SUT). The HC-based unit sensor uses a fringing field sensing capacitor (FFSC) as a 'sensing pad' and interacts directly with the SUT to detect surface cracks. The designed sensor can detect the minimum crack size of 0.5 mm while operating in the frequency range of 0.25-2.75GHz. The designed sensors have potential applications for detecting surface cracks in valuable infrastructure including aircraft, bridges, pipelines and strengthening their safety and integrity.",
keywords = "CFRP, Composite materials, Hilbert-Curve, Microwave Sensor, NDT",
author = "Chaudhary, \{Vimal Kumar\} and Muhammad Zubair and Kazim, \{Jalil Ur Rehman\} and Muhammad Imran and Qammer Abbasi",
note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 4th IEEE Wireless, Antenna and Microwave Symposium, WAMS 2025 ; Conference date: 05-06-2025 Through 08-06-2025",
year = "2025",
doi = "10.1109/WAMS64402.2025.11158126",
language = "English",
series = "4th Wireless, Antenna and Microwave Symposium, WAMS 2025",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "4th Wireless, Antenna and Microwave Symposium, WAMS 2025",
address = "United States",
}