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Various electromagnetic (EM) structures become more complex and often have increasing degrees of design freedom. Classical optimization methods require numerous simulation trials of different parameter combinations, which leads to a low design efficiency. To address this problem, an efficient EM structure optimization algorithm which combines differential evolution (DE) with machine learning technology...
Commonly used optimization methods require hundreds or even thousands of evaluations of objective function. Due to the high computational cost of electromagnetic (EM) simulation, the efficiency of directly using these methods is often very low. This paper presents an efficient surrogate-based antenna design optimization method in which the number of simulations is decreased by a novel sampling strategy...
This novel antenna presented consists of top substrate with a quasi-square patch, middle air gap and bottom substrate with rectangular-helix-slotted ground and open-circuit microstrip feed line(50 Omega). It covers 7.9 GHZ-9.85 GHZ(VSWRles2, 20.3%). Gain ges3 dB when the ground is large enough. -3 dB beam-width is no less than 25deg both in E-plane and H-plane. The antenna also has simplicity, compactness,...
A new practical of wide-slot antenna cut in the ground plane with H-shaped microstrip-line-fed is proposed. Two different size of slots are cut in each side of the ground plane in order to generate new band. The antenna covers 780 MHz -990 MHz and 1.69 GHz-2.65 GHz (VSWR les 2). So it can apply for AMPS, GSM, DCS, PCS, UMTS and WLAN. The peak gain of this antenna is 2.5 dB in 900 MHz and 5.6 bB in...
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