CAJ | 학술논문

由于等效电阻谐振条件限制,传统的单层电路模拟吸波体(CA)结构在低频段不能形成多个谐振点.为了突破这个限制,本文提出了一种金属线阵列嵌入的单层CA结构.该结构在低频段形成了双谐振峰吸收,拓展了吸波频带.采用准静态模型,分析金属线阵列嵌入的单层CA结构内的电磁波的散射.分析结果表明,金属线阵列的嵌入使结构的介质层在低频激发等离子体谐振.在该谐振频率点,结构形成额外吸收峰,该吸收峰和单层CA结构原有的吸收峰一起实现了双峰吸收.实验和FDTD数值计算结果相符合,结果表明该结构在不增加厚度的前提下,扩展了低频段的吸波频段.
유우등효전조해진조건한제,전통적단층전로모의흡파체(CA)결구재저빈단불능형성다개해진점.위료돌파저개한제,본문제출료일충금속선진렬감입적단층CA결구.해결구재저빈단형성료쌍해진봉흡수,탁전료흡파빈대.채용준정태모형,분석금속선진렬감입적단층CA결구내적전자파적산사.분석결과표명,금속선진렬적감입사결구적개질층재저빈격발등리자체해진.재해해진빈솔점,결구형성액외흡수봉,해흡수봉화단층CA결구원유적흡수봉일기실현료쌍봉흡수.실험화FDTD수치계산결과상부합,결과표명해결구재불증가후도적전제하,확전료저빈단적흡파빈단.
A circuit analog absorber (CA) with wire medium is presented. Both the original CA and the structure presented are analyzed. It is shown that original CA cannot have more than one resonant frequency in low frequency band, owing to the limitation by the effective resistance. The presented structure breaks the limitation using artificial plasma resonance, with the wave dispersion in the structure analyzed using the quasi-static model. The experimental results, consistent with simulation results based on the finite-difference time-domain (FDTD) method, show that the structure obtains dual-band absorption, thus broadening the absorption band in low frequency band.