肖润均,石玉,李梅,等. 一种用于宽角扫描共口径相控阵的高性能天线单元[J]. 电波科学学报,2023,38(3):414-420. DOI: 10.12265/j.cjors.2022182
      引用本文: 肖润均,石玉,李梅,等. 一种用于宽角扫描共口径相控阵的高性能天线单元[J]. 电波科学学报,2023,38(3):414-420. DOI: 10.12265/j.cjors.2022182
      XIAO R J, SHI Y, LI M, et al. A high performance antenna element for wide-angle scan shared-aperture phased array applications[J]. Chinese journal of radio science,2023,38(3):414-420. (in Chinese). DOI: 10.12265/j.cjors.2022182
      Citation: XIAO R J, SHI Y, LI M, et al. A high performance antenna element for wide-angle scan shared-aperture phased array applications[J]. Chinese journal of radio science,2023,38(3):414-420. (in Chinese). DOI: 10.12265/j.cjors.2022182

      一种用于宽角扫描共口径相控阵的高性能天线单元

      A high performance antenna element for wide-angle scan shared-aperture phased array applications

      • 摘要: 为了满足毫米波高密度、宽角扫描共口径相控阵天线对高性能、紧凑型天线单元的需求,提出了一种宽带Ku/Ka共口径天线单元设计方案. Ku频段双极化天线采用“十”字形贴片作为辐射体,一对正交放置的缝隙用于激励两个正交工作模式. Ka频段天线为探针馈电的磁电偶极子天线,加载的4个小贴片起调节匹配和方向图的作用. 同时,Ka频段天线对Ku频段天线起寄生加载作用,在有效降低Ku频段天线谐振频率的同时扩展阻抗带宽. 仿真结果表明,Ku频段天线水平和垂直极化分别工作在14.4~17.6 GHz和14.4~17.4 GHz,−10 dB阻抗带宽分别为20% 和18.7%;Ka频段天线工作在30~40 GHz,−10 dB阻抗带宽大于28.5%,测试结果与仿真结果吻合良好. 所提出的共口径天线单元具有尺寸小、带宽宽的特点,其横向尺寸为8.5 mm×8.5 mm(0.45λ×0.45λλ为Ku频段中心频率16 GHz对应的波长). 本文为高密度、宽角扫描共口径相控阵天线提供了新颖的天线单元设计方案.

         

        Abstract: In order to meet the demond on high-performance, compact antenna elements for millimeter-wave high-density wide-angle scan shared-aperture phased array applications, a novelty design approach of broadband shared-aperture antenna element was proposed. A cross-shaped patch is utilized as the radiator of the dual-polarized antenna element operating in Ku-band, and a pair of orthogonal slots are utilized to feed the cross patch so as to produce two orthogonal modes. A probe-fed magneto-electric dipole is utilized as the Ka-band antenna element. Herein, four parasitic small patches are loaded on the top layer to improve the impedance matching and radiation patterns. Meanwhile, the Ka-band element acts as a parasitic loading that surrounds the Ku-band element, which could effectively reduce the resonance frequency of the Ku-band element and simutaneously expand the impedance bandwidth. The simulated results show that the Ku-band element matches well in the frequency range of 14.4–17.6 GHz and 14.4–17.4 GHz for the horizontal and vertical polarization, respectively, with −10 dB fractional impedance bandwidth of 20% and 18.7%. Ka-band antenna works at 30–40 GHz, and has a −10 dB impendance bandwidth of 28.5%. The measured results are in good agreement with the simulated ones. The shared-aperture antenna element is characterized by compact size and wide bandwdith. The transverse size of proposed antenna is 8.5 mm×8.5 mm (0.45λ×0.45λ, where λ is the wavelength at center frequency of Ku band). Therefore, the developed antenna could serve as a novel antenna element for high-density, wide-angle scan shared-aperture phased array applications.

         

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