Temat: ﬁreﬂy algorithm - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Synthesis and Failure Correction of Flattop and Cosecant Squared Beam Patterns in Linear Antenna Arrays
Autorzy:: Patidar, H.
Mahanti, G. K.
Muralidharan, R.
Powiązania:: https://bibliotekanauki.pl/articles/308727.pdf
Data publikacji:: 2017
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: cosecant squared pattern
failure correction
ﬁreﬂy algorithm
ﬂattop beam pattern
linear array
side lobe level
Opis:: This paper deals with the synthesis of ﬂattop and cosecant squared beam patterns using the ﬁreﬂy algorithm which is based on metaheuristics. This synthesis is followed by the correction of the radiation patterns when unfortunate malfunctioning of the individual elements in the array occurs. The necessary attention is given to the recovery process, with due emphasis on reduction of side lobe level, ripple and the reﬂection coeﬃcient. Simulation in Matlab shows a successful employment of the ﬁreﬂy algorithm in producing voltage excitations of the good elements necessary for the recovered patterns. The performance of the ﬁreﬂy algorithm in failure correction is validated by duly comparing it with a standard benchmark.
Źródło:: Journal of Telecommunications and Information Technology; 2017, 4; 25-30
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Synthesis of Reconfigurable Multiple Shaped Beams of a Concentric Circular Ring Array Antenna Using Evolutionary Algorithms
Autorzy:: Dubey, Sanjay Kumar
Mandal, Debasis
Powiązania:: https://bibliotekanauki.pl/articles/2200965.pdf
Data publikacji:: 2023
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: cosec2 beam
differential evolution algorithm (DE)
firefly algorithm (FA)
flat top beam
genetic algorithm (GA)
multiple shaped beam patterns
pencil beam
Opis:: The approach described in this paper uses evolutionary algorithms to create multiple-beam patterns for a concentric circular ring array (CCRA) of isotropic antennas using a common set of array excitation amplitudes. The flat top, cosec2, and pencil beam patterns are examples of multiple-beam patterns. All of these designs have an upward angle of θ = 0◦. All the patterns are further created in three azimuth planes (φ = 0◦, 5◦, and 10◦). To create the necessary patterns, non-uniform excitations are used in combination with evenly spaced isotropic components. For the flat top and cosecant-squared patterns, the best combination of common components, amplitude and various phases is applied, whereas the pencil beam pattern is produced using the common amplitude only. Differential evolutionary algorithm (DE), genetic algorithm (GA), and firefly algorithm (FA) are used to generate the best 4-bit discrete magnitudes and 5-bit discrete phases. These discrete excitations aid in lowering the feed network design complexity and the dynamic range ratio (DRR). A variety of randomly selected azimuth planes are used to verify the excitations as well. With small modifications in the desired parameters, the patterns are formed using the same excitation. The results proved both the efficacy of the suggested strategy and the dominance of DE over GA as well as FA.
Źródło:: Journal of Telecommunications and Information Technology; 2023, 1; 8--17
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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