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本文叙述了为远洋导航雷达所研制的一台波导开槽天线,该天线系3cm波导窄边开槽天线阵,中心频率为9375MC,阵元等间距,电流分布为泰勒分布,共156个阵元。整个天线置入限制垂直波束的喇叭内。阵元前放置截止式波导滤波器,用以消除互耦和抑制交叉极化。天线用玻璃钢外壳封装。设计指标为:主瓣宽度39′,边瓣电平-35dB,增益35dB。实际达到的指标为:主瓣宽度35′边瓣电平-26.5dB,增益35dB,与英国Decca公司同类产品相比基本一致,个别指标略有超过。
This article describes a waveguide slotted antenna developed for ocean-going navigation radar. The antenna is a 3cm waveguide narrow slotted antenna array with a center frequency of 9375MC and an equal spacing of array elements. The current distribution is Taylor distribution with a total of 156 array elements . The entire antenna is placed inside the speaker that limits the vertical beam. Cutoff waveguide filters placed before the array element to eliminate mutual coupling and suppress cross-polarization. Antenna with FRP package. Design specifications are: main lobe width 39 ’, side lobe level-35dB, gain 35dB. The actual indicators are: main lobe width of 35 ’side lobe level -26.5dB, gain 35dB, with the British Decca similar products basically the same, individual indicators slightly exceeded.