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宽带双圆极化喇叭天线可以有效地用于电子战系统,它的设计基础是双脊波导原理和正交双模在波导中传播的互不干扰的原理。据此,本文详细讨论了同轴输出型正交极化器,宽带圆极化器等的设计技术,比较了实现宽带圆极化器设计的各种相移器的优缺点。报告了试验模型天线双路同轴输出型双圆极化天线的实验结果:在8～18GHz频带范围內,驻波小于1.9;半功率波瓣宽度为58°～27°,副瓣电平为-18～-12dB;两路间隔离不管是主收副发或是副收主发,均大于22dB;在此频率范围内,天线的轴向轴比小于4dB;增益也满足使用要求。
Wideband dual circular polarization horn antenna can be effectively used in electronic warfare systems, which are based on the principle of double-ridge waveguide and orthogonal dual-mode propagation in the waveguide without disturbing each other. Therefore, this paper discusses the design techniques of coaxial output type orthogonal polarizer, broadband circular polarizer and so on in detail, and compares the advantages and disadvantages of various phase shifters for realizing broadband circular polarizer design. The experimental results of the dual antenna coaxial dual output circular antenna are reported. The standing wave is less than 1.9 in the frequency range of 8 ~ 18GHz. The half-power lobe width is 58 ° ~ 27 ° and the sidelobe level is -18 ~ -12dB. The isolation between the two ways is greater than 22dB, no matter whether it is main or secondary. The axial axial ratio of the antenna is less than 4dB in this frequency range. The gain also meets the requirements of use.