每年出版 12 期
ISSN 打印: 0040-2508
ISSN 在线: 1943-6009
Indexed in
A GIANT 'OPTICAL ACTIVITY' OF COMPOSITE PLANE-CHIRAL IRISES AT MICROWAVES
摘要
Recently, great attention has been paid to investigating metamaterials which represent composite artificial media with various electophysical properties and characteristics that cannot be always obtained using the available natural materials. In particular, considerable efforts are focused on analyzing the possibility of applying plane-chiral structures in rotators of radiation plane of polarization. The paper presents results of theoretical analysis and experimental study of properties of a two-layer composite plane-chiral iris (CPCI) located in a square waveguide. The measurements have been carried out in the 3-cm range of electromagnetic waves. It is shown that the CPCI displays the property of a giant "optical activity" and, in accordance with the calculations, is capable of rotating the plane of polarization by 90°. The calculated and measured maxima of the transmission factor for the cross-polarized component coincide in frequency with a high accuracy, and the amount of loss does not exceed 0.2 dB. It is shown that the bandpass can be adjusted through changing the layer separation.