Tolerance optimization design for low sidelobe linear arrays

2002 ◽  
Author(s):  
Y.-C. Jiao ◽  
Y.-H. Qi ◽  
L.-Y. Zhang
Keyword(s):  
Optimization Design ◽  
Linear Arrays ◽  
Tolerance Optimization ◽  
Low Sidelobe

Tolerance Optimization Design Based on Physical Programming Methods and PSO Algorithm

2011 ◽  
Vol 346 ◽  
pp. 584-592 ◽  
Author(s):  
H.B. Qiu ◽  
Y. Y. Dong ◽  
Y. Wang ◽  
L. Gao
Keyword(s):  
Optimization Design ◽  
Pso Algorithm ◽  
Tolerance Allocation ◽  
Dimensional Chain ◽  
Effective Solution ◽  
Key Factors ◽  
Physical Programming ◽  
Tolerance Optimization ◽  
Product Features ◽  
Mechanical Products

Product tolerance is one of the key factors which can determine the good or bad performance of mechanical products. Its size not only affects the manufacturing and assembly process, but also affects product features [1]. Thus tolerance optimization design gets more and more attention. In this paper, an improved physical programming method is used to make mathematical modeling for tolerance allocation problem of assembly dimensional chain, and PSO algorithm is also used to improve solving ability. And the effective solution for tolerance optimization is designed.

Low-Sidelobe Patterns From Small, Low-Loss Uniformly Fed Linear Arrays Illuminating Parasitic Dipoles

2009 ◽  
Vol 57 (5) ◽  
pp. 1584-1586 ◽  
Author(s):  
M. Alvarez-Folgueiras ◽  
J. A. Rodriguez-Gonzalez ◽  
F. Ares-Pena
Keyword(s):  
Low Loss ◽  
Linear Arrays ◽  
Low Sidelobe

scholarly journals Radiation Pattern Performance of Unequally Linear Arrays with Parasitic Element

2017 ◽  
Vol 6 (1) ◽  
pp. 110
Author(s):  
Noor Ainniesafina Zainal ◽  
Muhammad Ramlee Kamarudin ◽  
Yoshihide Yamada ◽  
Norhudah Seman
Keyword(s):  
Radiation Pattern ◽  
Base Station ◽  
Sidelobe Level ◽  
Linear Arrays ◽  
Parasitic Element ◽  
Array Configuration ◽  
Grating Lobe ◽  
Base Station Antennas ◽  
Low Sidelobe ◽  
Mobile Base

<p>For next generation of 5G mobile base station antennas, multibeam, multifrequency and low sidelobe characteristics requested. Simplify the feeding network will contribute a low feeder loss and frequency dependent. From the previous research by the author, low sidelobe level reported by density tapered array configuration from -13 dB to -16 dB and the result maintained for wideband operation frequency at 28 GHz, 42 GHz, and 56 GHz. However, the grating lobe has occurred due to element spacing larger than a wavelength of higher frequency (56 GHz). In this paper, an investigation was made of the performance of radiation pattern for unequally microstrip linear array antenna in frequency 42 GHz and 56 GHz by loading parasitic elements. The effect of parasitic element to the impedance, gain, and sidelobe level of unequally microstrip linear spaced tapered array also examined. The design has been simulated using Ansoft High Frequency Structural Simulator (HFSS) ver 16.0.</p>

Vortex Beam Optimization Design of Concentric Uniform Circular Array Antenna with Improved Array Factor

2021 ◽  
Vol 36 (7) ◽  
pp. 830-837
Author(s):  
Qiang Feng ◽  
Yifeng Lin ◽  
Yushan Zheng ◽  
Long Li
Keyword(s):  
Simulation Model ◽  
Optimization Design ◽  
Near Field ◽  
Electromagnetic Simulation ◽  
Vortex Beam ◽  
Circular Array ◽  
Power Conservation ◽  
Beam Radiation ◽  
Low Sidelobe ◽  
Measurement Results

In this paper, an improved array factor of the concentric uniform circular array (CUCA) antenna is proposed for the orbital angular momentum (OAM) vortex beam optimization design. From the perspective of the radiation pattern’s power conservation principle, a correction factor is introduced to the conventional array factor of CUCA. Then, based on the improved array factor, by adjusting the rings’ radii parameters of the CUCA, we optimize the vortex beam’s sidelobe level through the generic algorithm (GA). Two different CUCA antenna model are calculated as examples to further illustrate the effectiveness of the improved array factor. Subsequently, an electromagnetic simulation model of two rings CUCA antenna is built at C band for generating low sidelobe vortex beam carrying OAM mode. The electromagnetic simulation model of the designed CUCA antenna is also fabricated and measured. The corresponding antenna far-field vortex beam radiation pattern and near-field vortex wave electric field distributions are measured. The simulation results and the measurement results are in good agreement. The proposed designs of antenna and OAM vortex beam regulation are expected to be used for 5G and 6G communications applications

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