程钰间

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:在岗

所在单位:电子科学与工程学院

办公地点:四号科研楼A区

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团队有关Ku双极化/Ka单极化双频共口径宽角扫描相控阵天线的研究成果在IEEE TAP期刊上发表

发布时间:2022-12-30   点击次数:

论文名称为”Shared-aperture dual-polarized Ku-band and single-polarized Ka-band phased array antenna with scanning coverage enhancement”。针对现有的Ku/Ka频段共口径相控阵天线存在的极化模式少、异频天线相互强干扰和扫描范围受限的问题,该文采用端射式偶极子天线作为辐射单元,并按照异频同极化、异频异极化的顺序分析耦合机理并提出相应的去耦手段。首先,针对Ku/Ka异频同极化天线之间由于共地导致的扫描遮挡效应,该文提出通过在Ka频段偶极子天线上方加载引向器,调整Ka频段天线的等效相位中心位置,避免了Ka频段大角度扫描时,Ku频段天线对Ka频段天线波束的遮挡。随后,针对Ku/Ka频段天线异频同极化由于Ku频段二次谐波落入Ka频段造成的高次模式,通过在Ku频段天线辐射臂上引入缺陷环结构,在从而在环外和环内引入方向相反的高次模式电流,实现了高次模式的对消。最后,针对Ku/Ka频段天线异频异极化由于结构上的临近带来的寄生谐振模式,通过引入寄生金属条和调整Ku频段天线馈电位置将谐振模式移出带外,消除了Ka频段天线的扫描盲点。设计完成的共口径相控阵天线,在Ku频段实现了双极化工作,相对带宽12.5%,E/H面扫描范围达到±50°;Ka频段单极化工作,相对带宽8.7%,E/H面扫描范围同样达到±50°。两个频段天线的有源驻波比在整个扫描范围和工作频段内均低于3.5。通过阵列的全波仿真和实物加工测试,得到的仿真和测试结果吻合较好,从而验证设计的可靠性。工作的主要完成人宋艾虎、程钰间。

论文链接:https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9834251

Abstract— A dual-polarized Ku-band and single-polarized Ka-band shared-aperture phased array antenna is proposed in this article. The endfire dipole antenna is designed as the radiating element of both bands. To eliminate the shading effect of the horizontal-polarized Ku-band antenna caused by the common ground, the director is loaded on the Ka-band antenna to increase the height of the equivalent phase center of the Ka-band antenna. The high-order mode of the horizontalpolarized Ku-band antenna is excited when the Ka-band antenna scans to a wide angle in H-plane within the frequency range of 33–34 GHz. An etched square ring is loaded on the Ku-band radiating arm to induce the reverse current to prevent such a highorder mode. The scanning blind spots occur at 33 and 35.8 GHz when the Ka-band antenna scans to 50◦ in E-plane owing to the mutual coupling between the Ka-band antenna and the verticalpolarized Ku-band antenna. A metallic strip is loaded on the vertical-polarized Ku-band antenna to eliminate the blind spot at 33 GHz. The feeding position of the vertical-polarized Ku-band antenna is elevated to eliminate the blind spot at 35.8 GHz. The periodic cell and finite array are simulated to verify the design proposed in this article. The results demonstrate that the design is effective and the beam-scanning coverage reaches ±50◦ at both bands. The active voltage standing wave ratio (VSWR) is not greater than 3.5 at 15–17 and 33–36 GHz in the whole beamscanning coverage. A prototype of the 4 × 4 Ku-band and 8 × 8 Ka-band shared-aperture array is fabricated and measured. The measured results agree well with the simulated ones.

Index Terms— Dual-band, dual-polarization, scanning coverage enhancement, shared-aperture.