Radiation pattern simulation of antenna array problem with perfectly electrically conducting object in arbitrary shape using novel hybrid method of equivalence principle algorithm and physical optics

2014 ◽  
Vol 8 (4) ◽  
pp. 217-227
Author(s):  
Kaizhi Zhang ◽  
Jun OuYang ◽  
Feng Yang ◽  
Jian Zhang ◽  
Wei Luo
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Hybrid Method ◽  
Equivalence Principle ◽  
Arbitrary Shape ◽  
Physical Optics ◽  
Electrically Conducting ◽  
Equivalence Principle Algorithm ◽  
Pattern Simulation

scholarly journals Study on Characteristics of Coupling Field from Super-low Altitude Target under Diverse Terrestrial Environments in Semi-active Radar System

2018 ◽  
Vol 173 ◽  
pp. 02034
Author(s):  
Gao Xiang Zou ◽  
Chuang Ming Tong ◽  
Qian Gao ◽  
Tong Wang ◽  
Peng Peng ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Radiation Pattern ◽  
Hybrid Method ◽  
Electromagnetic Scattering ◽  
Radar System ◽  
Physical Optics ◽  
Coupling Field ◽  
Terrestrial Environments ◽  
Simulation Results ◽  
Low Altitude

A novel electromagnetic scattering model is presented for studying coupling field of super-low altitude target under diverse terrestrial environments in semi-active radar system. The PO+MEC hybrid method is applied to obtain the electromagnetic scattering of target. The Physical Optics (PO) is introduced to calculate the scattering from facets of target. The Method of Equivalent Currents (MEC) is introduced to calculate the scattering from edges of target. Antenna radiation pattern of seeker is introduced to modify traditional Four Path Method (FPM) in semi-active radar system. Based on the modified FPM, the characteristics of coupling field from super-low altitude target under diverse terrestrial environments in semi-active radar system are studied. Simulation results can use for reference in the fields of remote sensing and detection for super-low altitude target.

scholarly journals RADIATION ANALYSIS OF LARGE ANTENNA ARRAY BY USING PERIODIC EQUIVALENCE PRINCIPLE ALGORITHM

2013 ◽  
Vol 136 ◽  
pp. 43-59 ◽  
Author(s):  
Kaizhi Zhang ◽  
Jun Ou Yang ◽  
Feng Yang ◽  
Chuan Wu ◽  
Yan Li ◽  
...  
Keyword(s):  
Antenna Array ◽  
Equivalence Principle ◽  
Equivalence Principle Algorithm ◽  
Large Antenna Array

Improved MoM-PO-Based Technique for Wideband Analysis of Antennas around Large Platforms

2012 ◽  
Vol 629 ◽  
pp. 646-648
Author(s):  
Ji Ma ◽  
Shu Xi Gong ◽  
Qian Wang
Keyword(s):  
Frequency Response ◽  
Method Of Moments ◽  
Hybrid Method ◽  
Wide Band ◽  
Numerical Results ◽  
Physical Optics ◽  
Impedance Matrix ◽  
Mutual Impedance ◽  
Interpolation Technique ◽  
Matrix Interpolation

An improved wide-band analysis which combines the hybrid method of moments-physical optics (MoM-PO) formula with impedance matrix interpolation technique for antennas around large platforms is presented. The algorithm proposed in this paper interpolated the mutual impedance matrix between MoM and PO regions rather than the MoM self-matrix. This practice can result in more accurate frequency response than the conventional approach. Sample numerical results demonstrate the capability of the algorithm.

scholarly journals Null Steering in Failed Antenna Arrays

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Om Prakash Acharya ◽  
Amalendu Patnaik ◽  
Sachendra N. Sinha
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Correction Procedure ◽  
Swarm Optimization ◽  
Array Pattern ◽  
Null Steering ◽  
Simulation Results ◽  
Pattern Simulation

Antenna array pattern nulling is desirable in order to suppress the interfering signals. But in large antenna arrays, there is always a possibility of failure of some elements, which may degrade the radiation pattern with an increase in side lobe level (SLL) and removal of the nulls from desired position. In this paper a correction procedure is introduced based on Particle Swarm Optimization (PSO) which maintains the nulling performance of the failed antenna array. Considering the faulty elements as nonradiating elements, PSO reoptimizes the weights of the remaining radiating elements to reshape the pattern. Simulation results for a Chebyshev array with imposed single, multiple, and broad nulls with failed antenna array are presented.

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