Near field analysis of an aircraft on the layered half space by FDTD method

2016 ◽  
Author(s):  
He XinBo ◽  
Wei Bing ◽  
Wang Fei
Keyword(s):  
Half Space ◽  
Near Field ◽  
Fdtd Method ◽  
Field Analysis ◽  
Layered Half Space

scholarly journals Transient Response of Thin Wire above a Layered Half-Space Using TDIE/FDTD Hybrid Method

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
Bing Wei ◽  
Qiong He ◽  
Jie Li ◽  
Ren-xian Li ◽  
Li-xin Guo
Keyword(s):  
Half Space ◽  
Transient Response ◽  
Hybrid Method ◽  
High Efficiency ◽  
Fdtd Method ◽  
Thin Wire ◽  
One Dimensional ◽  
Reflected Wave ◽  
The Time Domain ◽  
Layered Half Space

The TDIE/FDTD hybrid method is applied to calculate the transient responses of thin wire above a lossy layered half-space. The time-domain reflection of the layered half space is computed by one-dimensional modified FDTD method. Then, transient response of thin wire induced by two excitation sources (the incident wave and reflected wave) is calculated by TDIE method. Finally numerical results are given to illustrate the feasibility and high efficiency of the presented scheme.

scholarly journals Ka-Band Lightweight High-Efficiency Wideband 3D Printed Reflector Antenna

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Yu Zhai ◽  
Ding Xu ◽  
Yan Zhang
Keyword(s):  
High Efficiency ◽  
Near Field ◽  
Side Lobe ◽  
High Gain ◽  
Reflector Antenna ◽  
Field Analysis ◽  
Side Lobe Level ◽  
Ka Band ◽  
3D Printed ◽  
Reflecting Surface

This paper presents a lightweight, cost-efficient, wideband, and high-gain 3D printed parabolic reflector antenna in the Ka-band. A 10 λ reflector is printed with polylactic acid- (PLA-) based material that is a biodegradable type of plastic, preferred in 3D printing. The reflecting surface is made up of multiple stacked layers of copper tape, thick enough to function as a reflecting surface (which is found 4 mm). A conical horn is used for the incident field. A center-fed method has been used to converge the energy in the broadside direction. The proposed antenna results measured a gain of 27.8 dBi, a side lobe level (SLL) of −22 dB, and a maximum of 61.2% aperture efficiency (at 30 GHz). A near-field analysis in terms of amplitude and phase has also been presented which authenticates the accurate spherical to planar wavefront transformation in the scattered field.

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