物理学报Issue(7)：202-206,5.DOI:10.7498/aps.62.074101
基于集总元件的低频宽带超材料吸波体设计与实验研究
Design and experiments of low-frequency broadband metamaterial absorber based on lumped elements∗
摘要
Abstract
A structure of matematerial absorber constructed based on lumped elements is proposed, analyzed theoretically and verified experimentally. The simulated results indicate that the absorption of the proposed absorber is over 95%in the frequency range of 2.5 to 4.46 GHz, and the FWHM is 70.4%. The designed structure has a better impedance matching characteristic to the free space in a wider frequency range when loaded with lumped elements by scattering parameter retrieval calculation. It also can be found that the large loss occurs in lumped resistance, which contributes much to the low-frequency broadband absorption properties obtained by simulating the energy loss distribution of the dielectric surface. Results measured by means of the free space method agree well with the simulation. Further measured results also show that the thickness of FR4 substrate obviously has controllable effects on absorption properties of the absorber, the absorption wide band will move to lower frequency with the increase of thickness, and the optimal thickness for the structure of certain parameters also can be obtained.关键词
集总元件/超材料吸波体/低频/宽带Key words
lumped element/metamaterial absorber/low-frequency/broadband引用本文复制引用
王莹,程用志,聂彦†,龚荣洲..基于集总元件的低频宽带超材料吸波体设计与实验研究[J].物理学报,2013,(7):202-206,5.基金项目
国家自然科学基金(批准号:61176051,50772096)资助的课题 （批准号:61176051,50772096）
