个人信息Personal Information
教授 博士生导师
性别:男
毕业院校:东南大学
学历:博士研究生毕业
学位:工学博士学位
在职信息:在职人员
所在单位:电子科学与工程学院
办公地点:四号科研楼A区
团队有关一种基于混合磁/电偶极子辐射源的低剖面低交叉极化泄漏双极化Ka波段相控阵天线的成果在IEEE TAP期刊上发表
发布时间:2023-12-26 点击次数:
论文名称“Dual-Polarized Ka-Band Phased Array Using Hybrid Magnetic-/Electric-Dipole With Low Profile for Low Cross-Polarization Leakage Inside ±60° Scan Volume”,介绍了一种工作带宽覆盖26-40 GHz 16×16双极化相控阵。对于双极化相控阵天线,交叉极化泄漏的来源主要包括来自馈线和辐射源的极化耦合。电偶极子和磁偶极子是最常见的辐射源,它们在D平面扫描时都会遭受极化隔离的恶化。因此,采用混合磁/电偶极子辐射源来解决这个问题。为了避免电偶极子的典型1/4波长馈线产生严重的交叉极化泄漏,选择磁偶极子来形成带有典型1/10波长馈线的主辐射源。因此,辐射源和馈线上激发的电/磁场矢量可以被显著削弱。然而,低剖面的磁偶极子由于水平馈线和地平面之间的耦合引入了半TM11模式。这种带有斜极化的寄生辐射模式严重恶化了磁偶极子的极化隔离。采用短路柱来抑制半TM11模式,而不破坏磁偶极子辐射模式。通过这样,可以保持双极化磁偶极子辐射源的高极化隔离特性。然后,设计双层电磁超表面作为次辐射源,即电偶极子。该电磁超表面还扮演阻抗匹配层的角色。基于这些方法,当扫描到{0°、30°、60°}时,在E/H平面和D平面上实现了优于{−66、−59、−52} dB和{−66、−28、−17} dB的交叉极化水平。工作主要完成人:孙建旭,程钰间。
论文链接:https://ieeexplore.ieee.org/document/10076403/keywords#keywords
Abstract: This article presents a 26–40 GHz 16×16 dual-polarized phased array. For the dual-polarized phased array antennas, the sources of cross-polarization leakage mainly include the polarization coupling from the feedlines and the radiators. Electric-dipole (E-dipole) and magnetic-dipole (M-dipole) are the most common radiators, which both suffer from the deteriorated polarization isolation when scanning in D-plane. Here, the hybrid M-/E-dipole is employed to overcome this issue. To avoid the serious cross-polarization leakage from the typical 1/4 wavelength feedline of E-dipole, the M-dipole is chosen to form the primary radiator with the typical 1/10 wavelength feedline. Therefore, the excited electric-/magnetic-current field vectors on the radiators and the feedlines can be significantly weakened. However, the low-profile M-dipole introduces the half-patch TM11 mode due to the coupling between the horizontal feedline and the ground plane. This parasitic radiation mode with the slant polarization seriously deteriorates the polarization isolation of the M-dipole. The shorted posts are employed to suppress the half-patch TM11 mode without breaking the M-dipole mode. Through that, the high polarization isolation characteristic of the dual-polarized M-dipole radiator is maintained. Then, the double-layer meta-surface (MS) is designed to act as the secondary radiator, i.e., the E-dipole. The MS also plays the role of the impedance matching layer. Based on these methods, the cross-pol. level better than {−66, −59, −52} dB in E-/H-planes and {−66, −28, −17} dB in D-plane when scanning to {broadside, 30°, 60°} is achieved, respectively.
Index Terms—Dual-polarized phased array antenna, fifth-generation (5G), low cross-polarization leakage, millimeter wave, wide scanning, wideband.