Zobrazeno 1 - 10
of 928
pro vyhledávání: '"side lobe level"'
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 4, Pp 1041-1060 (2024)
Pattern synthesis is widely used in many radar and communication systems and received great interest. So, this paper proposes a new beamforming strategy based on a hybrid combination between grey wolf optimizer (GWO) with ${\mathrm { L}}_{2}$ -norm c
Externí odkaz:
https://doaj.org/article/3151fba750a94b1881677fa439212fcc
Publikováno v:
BioMedInformatics, Vol 3, Iss 4, Pp 1197-1215 (2023)
The advancement in technology and the availability of specialized digital signal processing chips have made digital filter design and implementation more feasible in a variety of fields, including biomedical engineering. This paper makes two key cont
Externí odkaz:
https://doaj.org/article/ce5e06eeebaf4020bc4fd284edaa2966
Publikováno v:
Ain Shams Engineering Journal, Vol 15, Iss 3, Pp 102582- (2024)
A non-uniform aperture distribution slotted waveguide antenna is presented. The slotted waveguide antenna array is chosen for its ease for aperture distribution control and the flexibility of gain adjustment. Multiple aperture distribution functions,
Externí odkaz:
https://doaj.org/article/ffc7de5bf3fb440a833aa84d96ede919
Publikováno v:
IEEE Access, Vol 11, Pp 129552-129565 (2023)
A novel metasurface reflector unit cell based on two coupled resonators is proposed and demonstrated for real-time reconfigurable beamforming in the X-band (8-12 GHz). The unit cell is composed of a split-ring resonator (SRR) with tunable capacitance
Externí odkaz:
https://doaj.org/article/a52e6c6030ad4787bbf1174f4f102925
Publikováno v:
Alexandria Engineering Journal, Vol 61, Iss 9, Pp 7233-7264 (2022)
In this paper, a new hybrid beamforming approach based on the 2D convolution and genetic algorithm (GA), denoted as C/GA, is proposed for side lobe level (SLL) reduction and size miniaturization of planar antenna arrays (PAA). The convolution algorit
Externí odkaz:
https://doaj.org/article/9497e993e2d84508a944b66e9c6ebdd7
Publikováno v:
Alexandria Engineering Journal, Vol 61, Iss 8, Pp 5903-5917 (2022)
In this paper, a new optimized quadrant pyramid antenna array (O-QPAA) structure is proposed for back lobe minimization of planar antenna arrays (PAA). Based on the PAA size, it is thought to be formed of a number of concentric co-planar squared ante
Externí odkaz:
https://doaj.org/article/be7eff20118e467aa77fdf87aa24b469
Publikováno v:
Alexandria Engineering Journal, Vol 61, Iss 8, Pp 5983-5999 (2022)
Spectrum sensing (SS) is substantial demand for enabling cognitive radio (CR) systems. In recent years, digital beamforming (DBF) is exploited for performance enhancement of multiple antenna elements or uniform linear array (ULA) based spectrum sensi
Externí odkaz:
https://doaj.org/article/42e8a4ea0ac14b338948463572551f92
Autor:
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
Publikováno v:
Photonics, Vol 10, Iss 12, p 1300 (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. The intensity o
Externí odkaz:
https://doaj.org/article/ae01ef94259b48c2b048b77c0028c51d
Autor:
Vadim A. Nenashev, Aleksandr R. Bestugin, Alexey V. Rabin, Sergei V. Solenyi, Sergey A. Nenashev
Publikováno v:
Sensors, Vol 23, Iss 23, p 9528 (2023)
Currently, various applications of ultra-wideband signal–code constructions are among the most vibrant technologies, being implemented in very different fields. The purpose of this research consists of analyzing Barker codes and searching for the o
Externí odkaz:
https://doaj.org/article/1701a5dcdac845e1b9e55b7546c1899a
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