scholarly journals Optical near-field analysis of spherical metals: Application of the FDTD method combined with the ADE method: errata

2008 ◽  
Vol 16 (6) ◽  
pp. 4375
Author(s):  
Takashi Yamaguchi ◽  
Takashi Hinata
Keyword(s):  
Near Field ◽  
Fdtd Method ◽  
Field Analysis

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.

Trapping of Nano-Particles Using a Near-Field Optical Fiber Probe

2012 ◽  
Vol 516 ◽  
pp. 90-95
Author(s):  
Bing Hui Liu ◽  
Li Jun Yang ◽  
Yang Wang
Keyword(s):  
Near Field ◽  
Fdtd Method ◽  
Laser Wavelength ◽  
Nano Particles ◽  
Minimum Size ◽  
Fiber Probe ◽  
Circular Shape ◽  
Optical Fiber Probe ◽  
Fibre Probe ◽  
Difference Time

By employing a generalization of the conservation law for momentum using the finite difference time domain (FDTD) method, the feasibility of using a near-field optical fibre probe to create near-field optical trapping is investigated. Numerical results indicate that the scheme is able to trap nanoparticles with diameters of tens of nanometres in a circular shape with lower laser intensity. Using the built system with a tapered metal-coated fibre probe, 120 nm polystyrene particles are trapped in a multi-circular shape with a minimum size of 400 nm. They are at a resolution of λ/7 (λ: laser wavelength) and d (d: tip diameter of fiber probe), respectively.

Near-Field Analysis of Broadband Scattering

2021 ◽  
Author(s):  
Mao Mao ◽  
Yan Chen ◽  
Fukang Li ◽  
Yang Yang ◽  
Xiaoxiang He ◽  
...  
Keyword(s):  
Near Field ◽  
Field Analysis

A physical optics based near-field analysis method for the design of dual polarized fan beam shaped reflector antennas

2016 ◽  
Vol 70 (2) ◽  
pp. 132-137 ◽  
Author(s):  
E. Bagheri-Korani ◽  
K. Mohammadpour-Aghdam ◽  
M. Ahmadi-Boroujeni ◽  
E. Arbabi ◽  
M. Nemati
Keyword(s):  
Near Field ◽  
Field Analysis ◽  
Physical Optics ◽  
Analysis Method ◽  
Reflector Antennas ◽  
Dual Polarized

Near-field analysis of E-plane sectoral solid dielectric horn antennas

1991 ◽  
Vol 71 (4) ◽  
pp. 697-706 ◽  
Author(s):  
Anil K. Singh ◽  
B. Jha ◽  
R. K. Jha
Keyword(s):  
Near Field ◽  
Field Analysis ◽  
Solid Dielectric ◽  
Horn Antennas

Near field analysis of CSG and BSG combined element under high power laser condition

2006 ◽  
Author(s):  
Xin Yao ◽  
Fuhua Gao ◽  
Yixiao Zhang ◽  
Lei Wang ◽  
Yongkang Guo ◽  
...  
Keyword(s):  
High Power ◽  
Near Field ◽  
Field Analysis ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Condition
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