圆极化
消光比
光学
极化(电化学)
带宽(计算)
轴比
物理
多波段设备
偶极子
线极化
材料科学
微带线
化学
天线(收音机)
波长
电信
物理化学
量子力学
激光器
计算机科学
作者
Hong Bin Wang,Yu Jian Cheng
标识
DOI:10.1109/tap.2019.2905962
摘要
A dual-band linear-to-circular polarization converter (LCPC) based on a single-layer dielectric substrate is proposed. The element of the converter consists of two identical metallic layers with a combination of a connected Jerusalem cross (JC) and an “I”-type dipole for each layer. The proposed converter is designed by using an equivalent circuit model (ECM). Left-handed circularly polarized (LHCP) and right-handed circularly polarized (RHCP) beams can be, respectively, generated at K-band and Ka-band excited by a linearly polarized (LP) wave tilted 45° relative to the x- and y-directions of the converter. In addition, the converter covers two operation bands for K-/Ka-band satellite communications with high conversion efficiency and low polarization extinction ratio (PER). After full-wave optimization, the proposed converter is fabricated and measured. The measured results show a good agreement with the simulated ones. Even though there exists a tradeoff between the angular stability and the bandwidth of the dual-band LCPCs, the measured axial ratio (AR) remains stable in the lower operation band and a slight fluctuation in the higher band with the incident angle of 20°.
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