An Empirical Model of Volume Scattering From Dry Sand-Covered Surfaces at Millimeter-Wave Frequencies

2013 ◽  
Vol 51 (6) ◽  
pp. 3673-3682 ◽  
Author(s):  
Adib Y. Nashashibi ◽  
Kamal Sarabandi ◽  
Fahad A. Al-Zaid ◽  
Sami Alhumaidi
Keyword(s):  
Millimeter Wave ◽  
Empirical Model ◽  
Volume Scattering ◽  
Dry Sand

scholarly journals AN EXPERIMENTAL STUDY OF THE PENETRATION OF CYLINDRICAL PROJECTILES INTO DRY SAND

2020 ◽  
Vol 82 (3) ◽  
pp. 283-295
Author(s):  
V.V. Balandin ◽  
Vl.Vl. Balandin ◽  
V.V. Parkhachev
Keyword(s):  
Millimeter Wave ◽  
High Speed ◽  
Radio Interferometer ◽  
Wave Radio ◽  
Ballistic Experiment ◽  
Wide Range ◽  
Measurement Results ◽  
Complete Study ◽  
Direct Experiment ◽  
Dry Sand

For the most complete study of the laws of shock interaction of solids with soil barriers, further development of experimental techniques for recording the parameters of the interaction process in direct and inverse experiments is necessary. In this work, to determine the parameters of the movement of the projectile (displacement and speed) in a direct experiment, a millimeter-wave radio interferometer is used. This method allows continuous recording of the movement of the rear end of the striker with high accuracy over a wide range of movements. Using the proposed technique, experiments were carried out to record the motion parameters of cylindrical impactors made of steel and aluminum alloy when interacting with an obstacle made of dry sand. At the same time, the movement of the rear end of the striker was also controlled using high-speed filming until the full immersion of the striker. The experiments showed that the measurement results obtained using two methods coincide within the measurement error. Based on the experiments, it can be concluded that the methodology for determining the displacement and velocity of a projectile in a ballistic experiment using a millimeter-wave radio interferometer allows continuous measurement of large displacements (100 mm or more), including when completely immersed in a target with sufficient practical goals accuracy. Based on the results of the experiments, the dependences of the movement of the projectile and its speed on time are constructed. A change in the penetration law was found with a decrease in the penetration velocity to values less than 100 m/s.

Empirical Model for Backscattering at Millimeter-Wave Frequency by Bare Soil Subsurface With Varied Moisture Content

2013 ◽  
Vol 10 (6) ◽  
pp. 1324-1328 ◽  
Author(s):  
Alon Eliran ◽  
Naftaly Goldshleger ◽  
Asher Yahalom ◽  
Eyal Ben-Dor ◽  
Menachem Agassi
Keyword(s):  
Moisture Content ◽  
Millimeter Wave ◽  
Empirical Model ◽  
Bare Soil ◽  
Wave Frequency ◽  
Soil Subsurface

Thin Film Inspection with Millimeter-Wave Reflectometer

1995 ◽  
Vol 7 (1) ◽  
pp. 89-100
Author(s):  
H. C. Han ◽  
E. S. Mansueto
Keyword(s):  
Thin Film ◽  
Millimeter Wave
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