The design and optimization of a self-complementary two-arm Archimedean spiral antenna backed by an absorptive cavity were presented. Parametric studies on the proposed antenna structure were carried out by using CST ...The design and optimization of a self-complementary two-arm Archimedean spiral antenna backed by an absorptive cavity were presented. Parametric studies on the proposed antenna structure were carried out by using CST MWS. Simulation results show that the proper choice of spiral turns and cavity depth can miniaturize the dimensions of the cavity-backed spiral antenna presented here. According to simulation results, prototype antennas operating in the 6 12 GHz band are fabricated and the dimension of the proposed cavity-backed spiral antenna is 22 mm (diameter)×15 mm (height). The performance of the proposed antenna was measured and compared with the simulation results. It is shown that the experimental results are consistent with the theoretical predictions and the suggested antenna is good enough to adapt for various wideband applications.展开更多
The study of metamaterials is among the most important and attractive topics of the electromagnetic field theory and applications in the past 15 years.Much effort has been devoted to scientific research into the new p...The study of metamaterials is among the most important and attractive topics of the electromagnetic field theory and applications in the past 15 years.Much effort has been devoted to scientific research into the new physical phenomena with great progress.This paper presents the thoughts about the applications of metamaterials in innovative antenna designs from an engineering perspective.The new understanding of metamaterials offers us great possibility to translate the physical concepts of metamaterials in laboratories to innovative antenna designs in practical engineering applications.The technologies have been successfully developed,significantly improving key performances of antennas at microwave and millimeter-wave bands.The recently invented metamaterial-based antennas demonstrate not only wide operating bandwidth,high antenna efficiency,high gain,but also significantly reduced volume with simple mechanical structures.展开更多
文摘The design and optimization of a self-complementary two-arm Archimedean spiral antenna backed by an absorptive cavity were presented. Parametric studies on the proposed antenna structure were carried out by using CST MWS. Simulation results show that the proper choice of spiral turns and cavity depth can miniaturize the dimensions of the cavity-backed spiral antenna presented here. According to simulation results, prototype antennas operating in the 6 12 GHz band are fabricated and the dimension of the proposed cavity-backed spiral antenna is 22 mm (diameter)×15 mm (height). The performance of the proposed antenna was measured and compared with the simulation results. It is shown that the experimental results are consistent with the theoretical predictions and the suggested antenna is good enough to adapt for various wideband applications.
文摘The study of metamaterials is among the most important and attractive topics of the electromagnetic field theory and applications in the past 15 years.Much effort has been devoted to scientific research into the new physical phenomena with great progress.This paper presents the thoughts about the applications of metamaterials in innovative antenna designs from an engineering perspective.The new understanding of metamaterials offers us great possibility to translate the physical concepts of metamaterials in laboratories to innovative antenna designs in practical engineering applications.The technologies have been successfully developed,significantly improving key performances of antennas at microwave and millimeter-wave bands.The recently invented metamaterial-based antennas demonstrate not only wide operating bandwidth,high antenna efficiency,high gain,but also significantly reduced volume with simple mechanical structures.
