银杏叶状仿生天线的构想与设计

文章运用仿生学的一些原理和知识,设计了一种基于圆形贴片的小型化宽带印刷微带天线,天线由基板、贴片、接地板三部分组成,贴片部分模仿银杏树叶的形状。介绍了微带贴片天线的工作原理以及描述天线性能的一些参数,对各种实施方案作出分析,通过HFSS9.2建模,对天线的各类参数进行了细致的调节,研究了天线各部分尺寸参数变化对其性能的影响。通过仿真过程,结果表明:天线只能在2-3GHz左右的频带范围内满足驻波比小于2以及方向性比较好的要求;但在更高的频率范围内的仿真结果却不尽人意;比对分析后选定了最佳的参数,制作出的实物也证明了此种仿生天线的设计是可行的。这种设计在一定程度上改善了天线的性能。研究表明,利用仿生学的知识解决天线设计中遇到的问题是可行的,仿生类天线今后或许可以成为一个有很大发展空间的研究领域。

The Design of a Bionic Antenna

In this paper,the author applies some principles of bionics and knowledge to design a circular patch of small wideband printed antenna,which is made up of the substrate,patch and earth-plate.The patch part imitates the shape of ginkgo leaves,describing the working principle of microstrip patch antennas and antenna performance of some of the parameters,analyzing various implementation options through HFSS9.2 modeling,adjusting the various parameters of the antenna carefully and the various parts of the antenna size parameters on performance.The results : the antenna can only be around 2-3GHz frequency range to meet the VSWR with less than 2 and the direction of good requirements;but the simulation results are unsatisfactory at a higher frequency range.In some frequency ranges,VSWR rarely changes in the size of changes in various parameters with significant ups and downs,and it is difficult to eliminate the cracking phenomenon of antenna radiation pattern with more than 4GHz.The design with the best parameters is feasible.The design has improved the performance of the antenna to some extent.The study also shows that it is possible to solve the difficulties encountered in antenna design with the bionics knowledge.This kind of design with bionic antenna may be an approach and a new research field in future.