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Millimeter wave differential probes have demonstrated great potential for high-resolution near-field imaging and detection of small and low scattering targets. There are several differential probe designs that already exist each with own advantages and disadvantages. An alternative design, using switchable loaded elliptical slot antennas placed on a standard waveguide aperture is proposed. The proposed...
Microwave and mm-wave reflectometry is one of the potential techniques for diagnosis of human skin for detection of diseases such as skin cancer. It is shown that using an open-ended waveguide probe, non-contact measurements of the reflection properties of skin may be conducted leading to distinction between dielectric properties of normal and diseased skin. This technique can then be extended into...
Carbon fiber reinforced polymer (CFRP) composites are increasingly being used to strengthen various components of civil, aerospace, and automotive infrastructures. Subsequent to the application of CFRP, evaluation of the structural integrity of the strengthened members becomes a critical issue. Microwave noninvasive inspection techniques have been successfully used for this purpose. To this end, a...
Carbon fiber reinforced polymer (CFRP) composites are increasingly being used in strengthening structures of civil infrastructures, aerospace and automotive industries. Subsequent to the application of CFRP, detection and evaluation of the structural integrity of the member becomes a critical issue. Microwave non-invasive inspection techniques have been successfully used for inspecting these structures...
Undesired manufactured or in-service produced anomalies in the form of voids in the SOFI and unbonds in the heat tiles can significantly reduce their designed effectiveness. Additionally, unbonds in the heat tiles may cause their complete separation from the fuselage exposing it to extreme heat. Millimeter wave NDT methods are viable candidate for life-cycle inspection of the SOFI and the acreage...
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