scholarly journals Optimal synthesis of reconfigurable planar arrays for monopulse radar applications: Use of subarrays and distributions with common aperture tail

2021 ◽  
Author(s):  
Zhengdong Qi ◽  
Xinggan Zhang ◽  
Yechao Bai ◽  
Qiong Wang ◽  
Chunhua Yu ◽  
...  
Keyword(s):  
Optimal Synthesis ◽  
Planar Arrays ◽  
Radar Applications

scholarly journals ON THE OPTIMAL SYNTHESIS OF RING SYMMETRIC SHAPED PATTERNS BY MEANS OF UNIFORMLY SPACED PLANAR ARRAYS

2010 ◽  
Vol 20 ◽  
pp. 33-48 ◽  
Author(s):  
Andrea Francesco Morabito ◽  
Antonia Rita Lagana ◽  
Tommaso Isernia
Keyword(s):  
Optimal Synthesis ◽  
Planar Arrays

Some aspects of the defect structure in an austenitic stainless steel

1978 ◽  
Vol 36 (1) ◽  
pp. 314-315
Author(s):  
R. Gonzalez ◽  
L. Bru
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Cellular Structures ◽  
Total Strain Amplitude ◽  
Total Deformation ◽  
Density Of Dislocations ◽  
Planar Arrays ◽  
Stacking Fault Tetrahedra ◽  
Distribution Of Dislocations ◽  
Very High

The analysis of stacking fault tetrahedra (SFT) in fatigued metals (1,2) is somewhat complicated, due partly to their relatively low density, but principally to the presence of a very high density of dislocations which hides them. In order to overcome this second difficulty, we have used in this work an austenitic stainless steel that deforms in a planar mode and, as expected, examination of the substructure revealed planar arrays of dislocation dipoles rather than the cellular structures which appear both in single and polycrystals of cyclically deformed copper and silver. This more uniform distribution of dislocations allows a better identification of the SFT.The samples were fatigue deformed at the constant total strain amplitude Δε = 0.025 for 5 cycles at three temperatures: 85, 293 and 773 K. One of the samples was tensile strained with a total deformation of 3.5%.

Free-Space Electromagnetic Characterization of Materials for Microwave and Radar Applications

PIERS Online ◽  
2005 ◽  
Vol 1 (2) ◽  
pp. 128-132 ◽  
Author(s):  
Habiba Hafdallah Ouslimani ◽  
Redha Abdeddaim ◽  
Alain Priou
Keyword(s):  
Free Space ◽  
Radar Applications ◽  
Characterization Of Materials

Vivaldi Antenna for Ground Penetrating Radar Applications

2018 ◽  
Vol 50 (001) ◽  
pp. 07-12 ◽  
Author(s):  
S. S. MEMON ◽  
A. A. JAMALI ◽  
M. R. ANJUM ◽  
M. M. MEMON ◽  
S. F. QADRI
Keyword(s):  
Ground Penetrating Radar ◽  
Radar Applications ◽  
Vivaldi Antenna ◽  
Ground Penetrating

Infrared and Visible—Near Infrared Electroluminescence Developments for FA in AlGaN/GaN HEMTS on SiC

2010 ◽  
Author(s):  
M. Bouya ◽  
D. Carisetti ◽  
J.C. Clement ◽  
N. Malbert ◽  
N. Labat ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Near Infrared ◽  
High Electron Mobility Transistor ◽  
Low Noise ◽  
Civil Defense ◽  
Base Stations ◽  
Infrared Range ◽  
High Electron ◽  
Radar Applications ◽  
Gan Hemts

Abstract HEMT (High Electron Mobility Transistor) are playing a key role for power and RF low noise applications. They are crucial components for the development of base stations in the telecommunications networks and for civil, defense and space radar applications. As well as the improvement of the MMIC performances, the localization of the defects and the failure analysis of these devices are very challenging. To face these challenges, we have developed a complete approach, without degrading the component, based on front side failure analysis by standard (Visible-NIR) and Infrared (range of wavelength: 3-5 µm) electroluminescence techniques. Its complementarities and efficiency have been demonstrated through two case studies.

A Novel Wideband Compact Tapered Slot Antenna for Shallow Icecap Detection Radar Applications

2011 ◽  
Vol 33 (6) ◽  
pp. 1471-1474
Author(s):  
Feng Zhang ◽  
Xiao-jun Liu ◽  
Yi-cai Ji ◽  
Guang-you Fang ◽  
Han-ji Ju
Keyword(s):  
Slot Antenna ◽  
Radar Applications
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