面向卫星通信的K波段低剖面可重构线圆极化变换表面  

K-band Low Profile Reconfigurable Linear-to-Circular Polarization Converter for Satellite Communication

作　　者：王东阳[1] 王洪斌[1] WANG Dongyang;WANG Hongbin(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都611731

出　　处：《无线电工程》2024年第9期2101-2108,共8页Radio Engineering

基　　金：国家自然科学基金(62101110)。

摘　　要：针对K波段卫星通信容量大、工作模式灵活的需求,设计了一款用于K波段卫星通信的反射型可重构线圆极化变换表面。该线圆极化变换表面基于改进型耶路撒冷十字结构,在PIN二极管导通和关闭时,分别可在18.59~20.50 GHz和18.66~23.19 GHz实现线极化波转右旋圆极化波和左旋圆极化波,重叠工作频段为18.66~20.50 GHz,带宽1.84 GHz。该极化变换表面的单元尺寸为0.22λ×0.2λ×0.083λ(λ为重叠频段中心工作波长),剖面高度仅为0.083λ。该极化变换表面在PIN二极管处于导通和关闭状态下,入射角度稳定性分别为40°和20°,且交叉极化电平低于-60 dB。With the demand for the high capacity and flexible operating modes of K-band satellite communication,a reflective reconfigurable linear-to-circular polarization converter for K-band satellite communication is designed.The linear-to-circular polarization converter is based on an improved Jerusalem cross structure,which can convert linearly-polarized waves into right-handed circularly-polarized waves and left-handed circularly-polarized waves in the frequency bands of 18.59~20.50 GHz and 18.66~23.19 GHz,respectively,with the PIN diode turned on and off.The overlapping working frequency band is 18.66~20.50 GHz with a bandwidth of 1.84 GHz.The unit size of the polarization converter is 0.22λ×0.2λ×0.083λ(λis the wavelength of the center frequency),and the profile height is only 0.083λ.When the PIN diode is under the on and off states,the incident angle stability is 40°and 20°respectively,with the cross-polarization level below-60 dB.

关 键 词：可重构线圆极化变换表面 PIN二极管 左右旋圆极化切换 低剖面 

分 类 号：TN820[电子电信—信息与通信工程]