Proceedings ArticleDOI
Exploiting asymmetry in a capacitively loaded strongly coupled dipole array
C. I. Kolitsidas,B. L. G. Jonsson,P. Persson,A. Stjerman +3 more
- pp 723-726
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TLDR
The scope of this work is to investigate asymmetry in a strongly coupled dipole array and exploit its effect for bandwidth and scanning improvement and pixelate parts of the element and optimize this parts with a genetic algorithm.Abstract:
The scope of this work is to investigate asymmetry in a strongly coupled dipole array and exploit its effect for bandwidth and scanning improvement. Typically, antenna array elements are symmetrical in E-and H-plane. Introducing non-symmetric elements offers additional freedom to improve the array characteristics. The effect of non-symmetric elements is studied and a reference case is created with a symmetric element in unit cell design. The obtained bandwidth for the reference case is a 6:1 at the broadside. Using this element as a base for this work, we pixelate parts of the element and optimize this parts with a genetic algorithm. Having an initial design (solution) reduces significant the number of iterations needed for the genetic algorithm to converge. The element was studied in a rectangular and in triangular lattice. The results indicate that in both cases the performance is improved. Finally, the performance of the developed array element was investigated in terms of the array figure of merit, a general measure of array element performance. This resulted in the best known array figure of merit; 0.84.read more
Citations
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Radio Antenna Design for Sky-Averaged 21cm Cosmology Experiments: The REACH Case
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Next Generation Wideband Antenna Arrays for Communications and Radio Astrophysics
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Edge effects in a strongly coupled dipole element array in triangular lattice
TL;DR: In this paper, the impact of edge effects in the equilateral triangular lattice of a strongly coupled dipole antenna array was studied and a novel wideband strongly coupled, single polarized, dipole array was proposed.
Patent
A broadband antenna
TL;DR: In this article, a single polarized radiator consisting of a plurality of planar notch radiating elements arranged on a dielectric substrate was proposed, where each radiating element comprises a metallized region (23) on the first side of the dielectrical substrate (22) extending across the width (w) of the radiating array from a forward edge (24) to a rear edge (25) and a tuning element (26) adjacent to a feeding point of the notch radiATING element (41), and a notch (28) extending from the tuning element to
Proceedings ArticleDOI
Helically counter-poised monopole antenna
TL;DR: In this article, a method of reducing the size of a conventional dipole antenna is introduced by means of replacing one of the dipole arms with a helical element, and the result of this asymmetrical arrangement is an antenna that presents an omnidirectional pattern with a modest reduction in gain and bandwidth.
References
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Journal ArticleDOI
A parameter study of stripline-fed Vivaldi notch-antenna arrays
Joon Shin,D.H. Schaubert +1 more
TL;DR: In this article, a parameter study of the wideband performance of the Vivaldi notch-antenna arrays demonstrates that the wide-band performance can be improved systematically by increasing the antenna resistance through a change of design parameters.
Journal ArticleDOI
Simple relations derived fom a phased-array antenna made of an infinite current sheet
TL;DR: In this article, the authors proposed a phase array model based on the principle of dividing the space in front of the array into parallel tubes or waveguides, one for each element cell in the sheet or array.
Proceedings ArticleDOI
A New Approach to Broadband Array Design using Tightly Coupled Elements
A. Mark Jones,James J. Rawnick +1 more
TL;DR: In this article, a fundamentally different approach to broadband array design has been developed and validated with measured hardware, which treats the array aperture as a periodic surface so that the performance of elements within the array environment is assured.
Journal ArticleDOI
Scanning Performances of Wideband Connected Arrays in the Presence of a Backing Reflector
TL;DR: In this article, the authors compared the performance of connected arrays of dipoles and slots with respect to the properties of the corresponding Green's functions (GFs) and showed that connected arrays are better suited to scan to wide angles (45 degrees) while retaining the minimal number of transmit/receive modules.