Results 31 to 40 of about 10,565,311 (162)

Effect of Beam-Steering Angle, Operation Wavelength and Mean Inter-Element Distance on the Side-Lobe Levels of Integrated Optical Phased Arrays under Beam-Steering Operation

Photonics, 2023
Integrated optical phased arrays (OPAs) play an important role in a broad range of applications. Fabrication constraints, however, pose a limit to the minimum inter-element separation that further results in high-intensity side lobes.
Ivan Aldaya, Bruna Dias Pires de Souza, Rafael Abrantes Penchel, Julian Leonel Pita, Mirian Paula dos Santos, José Augusto de Oliveira, Marcelo Luis Francisco Abbade   +6 more
doaj   +1 more source

ADAPTIVE BEAMFORMING IN SMART ANTENNA USINGTCHEBYSCHEFF DISTRIBUTION AND VARIANTS OF LEAST MEAN SQUARE ALGORITHM [PDF]

Journal of Engineering Science and Technology, 2017
Tchebyscheff distribution is used for adaptive beam formation for smart antenna combined with different variants of least mean square (LMS) algorithm.
ANUPAMA SENAPATI, JIBENDU SEKHAR ROY
doaj  

SLL attenuation-based thinned antenna design for next-generation communications

EURASIP Journal on Wireless Communications and Networking, 2019
Among the hot issues of the Fifth Generation (5G), developing by the Third Generation Partnership Project (3GPP), advanced antenna design significantly improves the wireless communication qualities.
Gebrehiwet Gebrekrstos Lema, Dawit Hadush Hailu, Tekle Brhane Wuneh   +2 more
doaj   +1 more source

Synthesis of Wideband Thinned Eisenstein Fractile Antenna Arrays With Adaptive Beamforming Capability and Reduced Side-Lobes

IEEE Access, 2022
A modern design of fractal antenna arrays, called fractile array, which exhibits a fractal boundary contour within a tiled plane, is explored for enhanced array performance. In this paper, the Eisenstein fractile array is introduced to exploit the unique
Said E. El-Khamy, Huda F. El-Sayed, Ahmed S. Eltrass   +2 more
doaj   +1 more source

Side-lobe level reduction in 1D photonic array antennas

, 2018
Photonic array antennas have been proposed to improve radiation features and to enable dynamic beam steering and beam forming. In CMOS-compatible photonic array antennas, fabrication constraints, however, limit the minimum separation distance between ...
Aldaya, Ivan [UNESP], Ferreira Junior, Antonio Elcio [UNESP], Pires de Souza, Bruna Dias [UNESP], Francisco Abbade, Marcelo Luis [UNESP], IEEE   +4 more
core   +2 more sources

Simple SLL Reduction Method for an SIW Longitudinal Slot Array Antenna

IEEE Access
The deployment of Ka-band radar necessitates addressing increased losses due to rain and free-space propagation, in addition to achieving low sidelobe levels (SLL).
Deokjin Seo, Junmo Choi, Jongin Ryu, Kyung-Young Jung   +3 more
doaj   +1 more source

Electrically large aperture horn array antenna with low side lobe level for Ku‐band frequency

, 2023
Using electrically large antennas for array applications may cause grating lobes and this can change the array pattern. To achieve a low side lobe level for boresight pattern for linear or planar array antennas, in the literature it is seen that the ...
KIZILAY, Ahmet, Ordek, Sezgin, Ahmet Kizilay, Sezgin Ördek   +3 more
core   +1 more source

Design of Non-uniform Circular Antenna Arrays Using Firefly Algorithm for Side Lobe Level Reduction

, 2014
A design problem of non-uniform circular antenna arrays for maximum reduction of both the side lobe level (SLL) and first null beam width (FNBW) is dealt with. This problem is modeled as a simple optimization problem. The method of Firefly algorithm (FFA)
Gopi Ram, Rajib Kar, Sakti Prasad Ghoshal, Durbadal Mandal   +3 more
core   +1 more source

Left-Handed Metamaterial Structure for Side Lobe Suppression of Microstrip Array Antenna [PDF]

, 2016
In this paper, a Left-handed Metamaterial (LHM) structure is designed for side lobe suppression of a microstrip array antenna at frequency 2.8-3.1 GHz.
Zulkifli, Fitri Yuli, Zulkifli, F. Y. (Fitri)   +1 more
core   +1 more source

OPTIMIZING AND THINNING PLANAR ARRAY USING CHEBYSHEV DISTRIBUTION AND IMPROVED PARTICLE SWARM OPTIMIZATION [PDF]

Jordanian Journal of Computers and Information Technology, 2015
In this paper, a new approach to the optimum solution based on the Chebyshev distribution for planar array and an improved particle swarm optimization (IPSO) will be considered.
Noor Salem Alshdaifat, Mohammed Hussein Bataineh   +1 more
doaj   +1 more source