scholarly journals Design and experimental characterization of a surface with low radar cross-section at millimeter-wave frequencies

2016 ◽  
Author(s):  
Claudia Vasanelli ◽  
Frank Boegelsack ◽  
Christian Waldschmidt
Keyword(s):  
Millimeter Wave ◽  
Cross Section ◽  
Radar Cross Section ◽  
Experimental Characterization

scholarly journals RADAR CROSS SECTION CHARACTERIZATION OF CORNER REFLECTORS IN DIFFERENT FREQUENCY BANDS AND POLARIZATIONS

2018 ◽  
Vol XLII-5 ◽  
pp. 637-642 ◽  
Author(s):  
P. V. Jayasri ◽  
K. Niharika ◽  
K. Yedukondalu ◽  
E. V. S. Sita Kumari ◽  
A. V. V. Prasad
Keyword(s):  
Cross Section ◽  
Radar Cross Section ◽  
Sampling Interval ◽  
Vital Role ◽  
Stringent Requirement ◽  
Frequency Bands ◽  
Test Range ◽  
Scatter Coefficient ◽  
Compact Antenna Test Range

<p><strong>Abstract.</strong> Corner Reflectors (CR) are standard passive radar targets which offer one of the best solutions for SAR calibration. Radar Cross Section (RCS) of corner reflectors plays a vital role for estimation of calibration parameters and hence back scatter coefficient for airborne and spaceborne SAR images. There is a stringent requirement to characterize RCS of corner reflectors by measuring its scattering properties in a controlled environment. RCS characterization of square trihedral corner reflectors, dihedrals including polarization selective dihedrals is addressed. These measurements were carried out at X, C and S band frequencies with wide scan angles at definite sampling interval. The design details of corner reflectors, specifications of Compact Antenna Test Range Facility, technical modalities involved for RCS measurements, variation of measured RCS from theoretical value for trihedral and dihedral reflectors at different frequency bands and polarizations are presented in this paper.</p>

Experimental Characterization of Pressure Loss Caused by Flow Through Foldcore Sandwich Structures

2017 ◽  
Author(s):  
Yves Klett ◽  
Carla Zeger ◽  
Peter Middendorf
Keyword(s):  
Cross Section ◽  
Pressure Loss ◽  
Fluid Transport ◽  
Mechanical Performance ◽  
Experimental Characterization ◽  
Large Cross Section ◽  
Flow Through ◽  
Folded Structures ◽  
Sandwich Core

Folded structures based on different tessellation types have been investigated as alternatives to conventional sandwich core materials like honeycombs and foams. Besides the mechanical performance offered by such foldcores, they feature some unique properties that can be used to integrate additional functionalities. One of these is the possibility to generate large cross-section channels within the sandwich core that can be used for gas and fluid transport. In this study, we present an experimental setup to measure pressure loss within foldcore sandwich panels, and compare results for seven different foldcore configurations.

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