| Summary: | 碩士 === 樹德科技大學 === 電腦與通訊研究所 === 96 === In this paper the study mainly key point on the current trends in development of wireless communications and provides dual band antenna design for application in wireless transmission system in the near future. Because scientific progress and people's quality of life to improve, the wireless products coming increasingly and commodiously. In this paper we propose a novel dual-band antenna design for widened tuning-stub square slot antenna by embedding a U-shaped slit. From relative literatures we can find that embedding a suitable slit in the resonant patch can excites a new resonant mode if it does not disturb the original resonant mode. Every antenna needs to spend designer's much energies, time cost and the material cost of finishing products before, above-mentioned can't be omitted either. This section proposes a particle swarm optimization (PSO) algorithm with Zeland IE3D electromagnetic simulation software to the optimal dual-band design of the loop antenna.The characteristic of PSO optimization and function of simulation software IE3D to analyse, is it import structure parameter and parameter range .to obtain the parameter association of the optimization. We propose a kind of new method and design to Combine above-mentioned two kinds of characteristics.
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