Modeling of anisotropic grating structures with active dipole layers

2015 ◽  
Author(s):  
K. Postava ◽  
T. Fördös ◽  
H. Jaffrès ◽  
L. Halagačka ◽  
H. J. Drouhin ◽  
...  
Keyword(s):  
Active Dipole

scholarly journals Active dipole clusters: From helical motion to fission

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
Andreas Kaiser ◽  
Katarina Popowa ◽  
Hartmut Löwen
Keyword(s):  
Helical Motion ◽  
Active Dipole

scholarly journals DESIGN OF PLANAR ARRAYS COMPOSED BY AN ACTIVE DIPOLE ABOVE A GROUND PLANE WITH PARASITIC ELEMENTS

2011 ◽  
Vol 119 ◽  
pp. 265-277 ◽  
Author(s):  
Juan Antonio Rodríguez-González ◽  
Francisco Jose Ares-Pena
Keyword(s):  
Ground Plane ◽  
Planar Arrays ◽  
Active Dipole

Manifestation of chiral asymmetry of ferroelectric liquid crystals induced by optically active dipole dopants in a linear electrooptic effect

1989 ◽  
Vol 6 (5) ◽  
pp. 533-543 ◽  
Author(s):  
A. Z. Rabinovich ◽  
M. V. Loseva ◽  
N. I. Chernova ◽  
E. P. Pozhidaev ◽  
O. S. Petrashevich ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Optically Active ◽  
Ferroelectric Liquid Crystals ◽  
Electrooptic Effect ◽  
Chiral Asymmetry ◽  
Active Dipole

scholarly journals Design of Non-Uniformly Spaced Circular Arrays of Parasitic Dipoles for Lower Side Lobe Level with Maximum Directivity

2018 ◽  
Vol 7 (1) ◽  
pp. 51-56 ◽  
Author(s):  
H. Patidar ◽  
G. K. Mahanti
Keyword(s):  
Mutual Coupling ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Circular Array ◽  
Method Of Moment ◽  
Lower Side ◽  
New Approach ◽  
Circular Arrays ◽  
Maximum Directivity ◽  
Active Dipole

This paper presents a new approach for circular array of parasitic dipoles composed by one active dipole for reduction of side lobe level with maximum directivity including mutual coupling. The desired goal is obtained by changing the spacing between the parasitic elements and length of the parasitic elements while the position and length of driven element is fixed. In addition to it, reflection coefficient (RC) of the driven element is kept closer to the specified value. Matlab based method of moment code is used to evaluate the performance of circular antenna designs generated by QPSO algorithm. Two examples are presented to show the effectiveness of this proposed approach.  

scholarly journals The influence of electromagnetic singularities on an active dipole antenna within a cavity

2003 ◽  
Vol 1 ◽  
pp. 57-61 ◽  
Author(s):  
F. Gronwald
Keyword(s):  
Quality Factor ◽  
Method Of Moments ◽  
Current Distribution ◽  
Dipole Antenna ◽  
Rectangular Cavity ◽  
Cavity Resonance ◽  
Cavity Resonances ◽  
Small Antenna ◽  
Active Dipole ◽  
Electromagnetic Source

Abstract. We study the influence of both the electromagnetic source singularity and electromagnetic cavity resonances on the current distribution of a dipole antenna within a rectangular cavity. These two types of electromagnetic singularities are triggered by the radius of the dipole antenna and the quality factor of the enclosing cavity, respectively. The key element of our investigation is a novel representation of the electromagnetic Green’s function for a lossy rectangular cavity. It allows to directly obtain the current distribution on the antenna by means of the method of moments. As a result it is recognized that a dominating source singularity, i.e., a small antenna radius, can inhibit resonating effects, even if a cavity resonance is excited and the quality factor of the cavity is high.

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