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Updated: Jun 29, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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使用微波传感的地质材料的动态分析.

Jamie Blanche1, Daniel Mitchell2, Junlong Shang3

  • 1James Watt School of Engineering, University of Glasgow, Glasgow, UK. jamie.blanche@glasgow.ac.uk.

Scientific reports
|March 27, 2024
PubMed
概括

频率调制连续波 (FMCW) 雷达提供了一种新的,非侵入性的方法来表征地质材料. 这种技术可以检测流体的存在,包含,并预测材料故障,增强地下能源应用.

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Standing Waves in a Cavity01:28

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
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