FDTD method for the scattered-field equation to calculate the radar cross-section of a three-dimensional target

2018 ◽  
Vol 17 (3) ◽  
pp. 1013-1018 ◽  
Author(s):  
Jian-Xiao Liu ◽  
Lu Ju ◽  
Ling-Hui Meng ◽  
Yu-Jie Liu ◽  
Zhi-Gang Xu ◽  
...  
Keyword(s):  
Field Equation ◽  
Cross Section ◽  
Scattered Field ◽  
Fdtd Method ◽  
Three Dimensional ◽  
Radar Cross Section

Physical Optics Radar Cross Section predictions for an anti-ship cruise missile

2021 ◽  
pp. 154851292110330
Author(s):  
Panagiotis Touzopoulos ◽  
Konstantinos C Zikidis
Keyword(s):  
Cross Section ◽  
Three Dimensional ◽  
Radar Cross Section ◽  
Physical Optics ◽  
Cruise Missile ◽  
Weapon System ◽  
Three Dimensional Model ◽  
Detection Range ◽  
Test Range ◽  
Radar Signature

The capability of the first strike is crucial in the modern battlefield. An important parameter is the radar signature or Radar Cross Section (RCS) of a weapon system, such as a fighter aircraft, a warship, or a missile, affecting the range at which this weapon system would be detected as a target by an enemy radar. If the attacker is detected too late, there will be minimal time for the defender to react, possibly not sufficient to counter the threat. The RCS of a weapon system is considered generally as classified information. However, it can be measured at a suitable measurement test range, if that weapon system is available. Otherwise, it can be predicted with the help of computational electromagnetics. Concerning the second approach, the following procedure was recently proposed: construction of a three-dimensional model of a target, based on available images and any relevant data, and then computation of the target RCS, with the Physical Optics approximative method. In the present approach, this procedure is applied to an anti-ship cruise missile in order to compute its RCS. Finally, the expected detection range for various naval radars is calculated.

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 Analysis of Terahertz Wave on Increasing Radar Cross Section of 3D Conductive Model

Electronics ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 74
Author(s):  
Hongyao Liu ◽  
Panpan Wang ◽  
Jiali Wu ◽  
Xin Yan ◽  
Yangan Zhang ◽  
...  
Keyword(s):  
Cross Section ◽  
Incident Wave ◽  
Three Dimensional ◽  
Radar Cross Section ◽  
Terahertz Wave ◽  
Plasma Sheath ◽  
Magnetized Plasma ◽  
Exponential Time Differencing ◽  
Thz Wave ◽  
Difference Time

Enhancing the frequency band of the electromagnetic wave is regarded as an efficient way to solve the communication blackout problem. In this paper, frequency of incident wave is raised to Terahertz (THz) band and the radar cross section (RCS) of the three-dimensional conductive model is calculated and simulated based on the Runge–Kutta Exponential Time Differencing–Finite Difference Time Domain method (RKETD-FDTD). Interaction of THz wave and magnetized plasma sheath is discussed. Attenuations in incident wave frequencies of 0.34 THz and 3 GHz and different plasma densities are analyzed. The monostatic RCS is used to compare the penetration in different incident wave frequencies while the bistatic RCS is fixed on 0.34 THz to study its characteristics. The simulation result has almost the same RCS as that of the model without coating plasma when the frequency of incident wave reaches 0.34 THz. The advantages of THz wave at 0.34 THz on increasing RCS and reducing the attenuation are demonstrated from different aspects including polarizations, incident angles, magnetization and anisotropy of plasma, thickness of plasma, scan planes and inhomogeneous distribution of plasma. It can be concluded that 0.34 THz has unique advantages in increasing the radar cross section and can be applied to solve the problem of communication interruption.

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