Experimental study on permittivity estimation method for UWB internal imaging radar

Manaka, Toshiki; Kidera, Shouhei; Kirimoto, Tetsuo

doi:10.1109/isanp.2014.7026576

Cited by 2 publications

(1 citation statement)

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“…These are attributed to a creeping wave propagating along the dielectric outer boundary. We previously developed a method that suppresses creeping signals without a priori knowledge of the outer dielectric boundary [13]. Applying this method to S CP 2 (X, Z, R), we obtained the actual transmissive delays (plotted as the range points q 2 in the bottom panel of Fig.…”

Section: Evaluation With Experimental Datamentioning

confidence: 99%

Dielectric Constant and Boundary Extraction Method for Double-Layered Dielectric Object for UWB Radars

Niimi

Kidera

Kirimoto

2015

IEICE Trans. Electron.

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Microwave ultra-wideband (UWB) radar systems are advantageous for their high-range resolution and ability to penetrate dielectric objects. Internal imaging of dielectric objects by UWB radar is a promising nondestructive method of testing aging roads and bridges and a noninvasive technique for human body examination. For these applications, we have already developed an accurate internal imaging approach based on the range points migration (RPM) method, combined with a method that efficiently estimates the dielectric constant. Although this approach accurately extracts the internal boundary, it is applicable only to highly conductive targets immersed in homogeneous dielectric media. It is not suitable for multi-layered dielectric structures such as human tissues or concrete objects. To remedy this limitation, we here propose a novel dielectric constant and boundary extraction method for double-layered materials. This new approach, which simply extends the Envelope method to boundary extraction of the inner layer, is evaluated in finite difference time domain (FDTD)based simulations and laboratory experiments, assuming a double-layered concrete cylinder. These tests demonstrate that our proposed method accurately and simultaneously estimates the dielectric constants of both media and the layer boundaries.

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Section: Evaluation With Experimental Datamentioning

confidence: 99%