周承冕,岳家璇,肖科,等. 基于新型宽带同轴的超短波双极化TCDA设计[J]. 电波科学学报,2023,38(3):393-399 + 406. DOI: 10.12265/j.cjors.2022177
      引用本文: 周承冕,岳家璇,肖科,等. 基于新型宽带同轴的超短波双极化TCDA设计[J]. 电波科学学报,2023,38(3):393-399 + 406. DOI: 10.12265/j.cjors.2022177
      ZHOU C M, YUE J X, XIAO K, et al. Design of ultrashort wave dual polarization TCDA based on new broadband coaxial[J]. Chinese journal of radio science,2023,38(3):393-399 + 406. (in Chinese). DOI: 10.12265/j.cjors.2022177
      Citation: ZHOU C M, YUE J X, XIAO K, et al. Design of ultrashort wave dual polarization TCDA based on new broadband coaxial[J]. Chinese journal of radio science,2023,38(3):393-399 + 406. (in Chinese). DOI: 10.12265/j.cjors.2022177

      基于新型宽带同轴的超短波双极化TCDA设计

      Design of ultrashort wave dual polarization TCDA based on new broadband coaxial

      • 摘要: 为解决在VHF和UHF频段内的紧耦合偶极子阵列(tightly coupled dipole array, TCDA)天线馈电网络设计困难、不利于工程化的问题,提出一款采用新型宽带同轴馈电的具有低剖面、双极化特点的TCDA天线设计方案. 该天线采用双偶极子单元结构,由二阶Wilkinson功分器和新型宽带同轴巴伦共同组成馈电网络,接地短路枝节抑制E面共模谐振,频率选择表面(frequency selective surface, FSS)层抑制H面扫描失配. 通过ADS-HFSS联合进行高效的电磁仿真,结果表明,该TCDA在110~500 MHz内电压驻波比(voltage standing wave ratio, VSWR)典型值<2,±45°扫描角度VSWR典型值<2.5,剖面高度小于0.1 \lambda _\mathrml\mathrmo\mathrmw . 该天线具有剖面低、易于全金属化的特点,为超短波频段TCDA的工程实际化提供了一种可靠的方法.

         

        Abstract: In order to solve the difficulty in designing the feed network of tightly coupled dipole array antenna (TCDA) in VHF and UHF bands, which is not conducive to engineering, we propose a design scheme of TCDA antenna with low profile and dual polar characteristics fed by a new broadband coaxial Balun. The antenna adopts a double dipole element structure. The feed network is composed of a second-order Wilkinson power divider and a new coaxial broadband Balun. The grounding short-circuit branch suppresses the common mode resonance on the E-plane, and the frequency selective surface FSS layer suppresses the scanning mismatch on the H-plane. Through ADS-HFSS joint electromagnetic simulation, the simulation results show that the TCDA has a typical value of VSWR<2, ±45° scanning angle VSWR<2.5 within 110−500 MHz, and the profile height is 265 mm, which is less than 0.1 \lambda _\rmlow . The antenna has the characteristics of low profile and easy metallization, which provides a reliable method for the engineering practice of ultrashort wave band TCDA.

         

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