Application of transformation optics in radar cross section reduction of targets with arbitrary two-dimensional geometries

2019 ◽  
Vol 125 (23) ◽  
pp. 234901
Author(s):  
Mohammad Hosein Fakheri ◽  
Ali Abdolali
Keyword(s):  
Cross Section ◽  
Radar Cross Section ◽  
Transformation Optics ◽  
Two Dimensional

scholarly journals Partially Transparent Jaumann-Like Absorber Applied to a Curved Structure

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Alireza Motevasselian ◽  
B. L. G. Jonsson
Keyword(s):  
Sensitivity Analysis ◽  
Cross Section ◽  
Low Frequency ◽  
Radar Cross Section ◽  
Frequency Interval ◽  
Two Dimensional ◽  
Resistive Layer ◽  
Front End ◽  
Low Pass ◽  
Metal Backing

A Jaumann absorber with its metal backing replaced with a combined low-pass and polarizer FSS is investigated with respect to its absorption and its polarization-dependent low-frequency transparency properties. This structure is applied to an idealized curved wing-front end, and its monostatic radar cross-section is determined. The FSS-Jaumann structure preserves an absorption similar to the planar Jaumann absorber in the higher frequency interval and enables a partial transparency in the TEzpolarization at 1 GHz. In addition, once the structure is applied to the wing-front end, a significant reduction in two-dimensional radar cross-section for both the TMzand TEzpolarization over 2–16 GHz is observed. A sensitivity analysis shows that the resistivity of the inner resistive layer has a large impact on the 1 GHz transmission.

scholarly journals Signal Propagation in Soil Medium: A Two Dimensional Finite Element Procedure

2021 ◽  
Author(s):  
Frank Kataka Banaseka ◽  
Kofi Sarpong Adu-Manu ◽  
Godfred Yaw Koi-Akrofi ◽  
Selasie Aformaley Brown
Keyword(s):  
Finite Element ◽  
Cross Section ◽  
Scattered Field ◽  
Radar Cross Section ◽  
Transverse Magnetic ◽  
Arbitrary Cross Section ◽  
Observation Angle ◽  
Two Dimensional ◽  
Total Field ◽  
Dimensional Finite Element

A two-Dimensional Finite Element Method of electromagnetic (EM) wave propagation through the soil is presented in this chapter. The chapter employs a boundary value problem (BVP) to solve the Helmholtz time-harmonic electromagnetic model. An infinitely large dielectric object of an arbitrary cross-section is considered for scattering from a dielectric medium and illuminated by an incident wave. Since the domain extends to infinity, an artificial boundary, a perfectly matched layer (PML) is used to truncate the computational domain. The incident field, the scattered field, and the total field in terms of the z-component are expressed for the transverse magnetic (TM) and transverse electric (TE) modes. The radar cross-section (RCS), as a function of several other parameters, such as operating frequency, polarization, illumination angle, observation angle, geometry, and material properties of the medium, is computed to describe how a scatterer reflects an electromagnetic wave in a given direction. Simulation results obtained from MATLAB for the scattered field, the total field, and the radar cross-section are presented for three soil types – sand, loam, and clay.

scholarly journals A HYBRID METHOD TO ACCELERATE THE CALCULATION OF TWO-DIMENSIONAL MONOSTATIC RADAR CROSS SECTION ON PEC TARGETS

2016 ◽  
Vol 50 ◽  
pp. 47-54
Author(s):  
Chao Fei ◽  
Xinlei Chen ◽  
Yang Zhang ◽  
Zhuo Li ◽  
Chang Qing Gu
Keyword(s):  
Cross Section ◽  
Hybrid Method ◽  
Radar Cross Section ◽  
Two Dimensional

Wideband radar cross section reduction using two-dimensional phase gradient metasurfaces

2014 ◽  
Vol 104 (22) ◽  
pp. 221110 ◽  
Author(s):  
Yongfeng Li ◽  
Jieqiu Zhang ◽  
Shaobo Qu ◽  
Jiafu Wang ◽  
Hongya Chen ◽  
...  
Keyword(s):  
Cross Section ◽  
Radar Cross Section ◽  
Two Dimensional ◽  
Phase Gradient ◽  
Wideband Radar

scholarly journals Design and experimental verification of a two-dimensional phase gradient metasurface used for radar cross section reduction

2014 ◽  
Vol 63 (8) ◽  
pp. 084103
Author(s):  
Li Yong-Feng ◽  
Zhang Jie-Qiu ◽  
Qu Shao-Bo ◽  
Wang Jia-Fu ◽  
Chen Hong-Ya ◽  
...  
Keyword(s):  
Cross Section ◽  
Experimental Verification ◽  
Radar Cross Section ◽  
Two Dimensional ◽  
Phase Gradient
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