Radio-frequency source estimation using field distribution measured on metamaterial absorber surface
Radio-frequency source estimation using field distribution measured on metamaterial absorber surface
复制标题
利用超材料吸收体表面测量的场分布进行射频源估计
DOI：
10.1109/piers.2016.7735549
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Tomohiko Imachi
中科院分区：
文献类型：
--
作者：
Satoshi Yagitani;Naoki Tonooka;Ryohei Kanaura;Ryohei Hayashi;Mitsunori Ozaki;Tomohiko Imachi
利用薄的超材料吸收体作为传感器阵列，测量了入射和吸收在其表面的射频波场的二维分布。吸收体被设计成使得入射波被与入射波阻抗匹配的超表面吸收。吸收是通过集总电阻互连的2-D密集阵列的蘑菇型方形贴片上接地的介质基板上形成的。插入在表面上沿行（x）和列（y）方向布置的相邻贴片之间的电阻器分别吸收超颖表面的谐振频率下的入射x偏振和y偏振。在这种情况下，x和y电阻器充当小的偶极子传感器，其输出与入射波的电场的x和y分量成比例的电压，其有效长度以单位单元尺寸给出。通过监测集总电阻阵列上的电压，得到了吸收体表面电场的二维幅值和相位分布。
A thin metamaterial absorber has been used as a sensor array to measure the 2-d distribution of radio-frequency (RF) wave field incident and absorbed on its surface. The absorber is designed so that the incident wave is absorbed by a metasurface which is matched with the incident wave impedance. Absorption is achieved by lumped resistors interconnecting a 2-d dense array of mushroom-type square patches formed on a grounded dielectric substrate. The resistors inserted between the adjacent patches arranged in the row (x) and column (y) directions on the surface absorb the incident x- and y-polarizations, respectively, at the resonance frequency of the metasurface. In this case the x- and y-resistors act as small dipole sensors which output the voltages proportional to the x- and y-components of electric field of the incident wave, with their effective lengths given as a unit cell size. By monitoring the voltages on the array of the lumped resistors, 2-d amplitude and phase distributions of electric field are obtained on the absorber surface.