scholarly journals A Phase Angle-Modulated Bat Algorithm with Application to Antenna Topology Optimization

2021 ◽  
Vol 11 (5) ◽  
pp. 2243
Author(s):  
Jian Dong ◽  
Zhiyu Wang ◽  
Jinjun Mo
Keyword(s):  
Topology Optimization ◽  
Phase Angle ◽  
Knapsack Problem ◽  
Bat Algorithm ◽  
Antenna Design ◽  
Dual Band ◽  
Experimental Result ◽  
High Dimensional ◽  
Angle Modulation ◽  
Planar Monopole Antenna

This paper proposes a phase angle-modulated bat algorithm (P-AMBA) for high-dimensional binary optimization. The idea was to reduce the optimization time by introducing angle modulation technology to reduce the optimization dimensions. Different from the original angle-modulated bat algorithm (AMBA), the control of the trigonometric generating function cosine wave is by introducing new parameters, thereby improving the perturbation ability of the function curve near the x-axis. P-AMBA can explore more 0/1 solutions, and it has advantages in optimizing convergence speed and global search capabilities. The numerical results of the 0–1 knapsack problem tests show that P-AMBA is superior to the contrast algorithms on optimization ability and optimization time. Finally, the experimental result of a compact dual-band planar monopole antenna design showed the effectiveness of P-AMBA in engineering applications.

A Compact CPW-Fed Dual-Band Planar Monopole Antenna for LTE/2.4-GHz/WiMAX, C-Band and HiperLAN/2 Applications

2019 ◽  
Vol 28 (13) ◽  
pp. 1950220
Author(s):  
Ahmed Zakaria Manouare ◽  
Saida Ibnyaich ◽  
Abdelaziz EL Idrissi ◽  
Abdelilah Ghammaz
Keyword(s):  
Reflection Coefficient ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Antenna Design ◽  
Dual Band ◽  
Vertical Strip ◽  
Feed Line ◽  
Planar Monopole Antenna ◽  
Good Agreement ◽  
Compact Planar

In this paper, we present the design of a compact planar monopole antenna for dual-band wireless communication applications. The proposed antenna is based on a planar structure composed by a CPW feed line and a rectangular ring with a vertical strip. The designed antenna has a small overall size of [Formula: see text][Formula: see text]mm3. Dual-band characteristics can be obtained by adjusting the distance between the rectangular ring and the ground plane of the CPW feed line, as well as the dimensions of the rectangular ring and the length of the vertical strip. A prototype of the proposed antenna which was fabricated and measured to validate the design reveals that there is a good agreement between the simulation and the experiment. The measured result shows that the antenna has the impedance bandwidths of 610[Formula: see text]MHz (2–2.61[Formula: see text]GHz) and 2600[Formula: see text]MHz (3.18–5.78[Formula: see text]GHz) with a reflection coefficient less than [Formula: see text]10[Formula: see text]dB covering all the LTE 2300, 2.4-GHz band, WiMAX, C-band and HiperLAN/2 applications. In addition, the dual-band monopole antenna exhibits almost omnidirectional radiation patterns and an appreciable gain over the operating frequency bands. Details of the proposed antenna design and both simulated and experimental results are analyzed and discussed.

Compact Dual-Band Circularly Polarized Antenna Design for Navigation Terminals

2016 ◽  
Vol 15 ◽  
pp. 802-805 ◽  
Author(s):  
Yan Li ◽  
Buning Tian ◽  
Jiangbo Xue ◽  
Guangding Ge
Keyword(s):  
Antenna Design ◽  
Dual Band ◽  
Circularly Polarized

Dual-end opened slot antenna design for dual-band WLAN uses on handsets

2017 ◽  
Vol 59 (11) ◽  
pp. 2848-2855 ◽  
Author(s):  
Chih-Kai Chang ◽  
Chi-Yuan Yao ◽  
Wen-Jiao Liao
Keyword(s):  
Antenna Design ◽  
Dual Band ◽  
Slot Antenna

scholarly journals A Novel Bat Algorithm Based on Differential Operator and Lévy Flights Trajectory

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Jian Xie ◽  
Yongquan Zhou ◽  
Huan Chen
Keyword(s):  
Differential Operator ◽  
Dimensional Space ◽  
Bat Algorithm ◽  
High Dimensional ◽  
Local Minima ◽  
Lévy Flights ◽  
Levy Flights ◽  
Mutation Strategy ◽  
Differential Algorithm ◽  
Simulation Results

Aiming at the phenomenon of slow convergence rate and low accuracy of bat algorithm, a novel bat algorithm based on differential operator and Lévy flights trajectory is proposed. In this paper, a differential operator is introduced to accelerate the convergence speed of proposed algorithm, which is similar to mutation strategy “DE/best/2” in differential algorithm. Lévy flights trajectory can ensure the diversity of the population against premature convergence and make the algorithm effectively jump out of local minima. 14 typical benchmark functions and an instance of nonlinear equations are tested; the simulation results not only show that the proposed algorithm is feasible and effective, but also demonstrate that this proposed algorithm has superior approximation capabilities in high-dimensional space.

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