L/S双频段圆形阵列单脉冲抛物面天线
doi: 10.3724/SP.J.1146.2006.00533
L/S Dual Bands Monopluse Paraboloid Antenna
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摘要: 该文研究了一种以六单元圆形阵列作为照射器的单脉冲抛物面天线，这种天线具有实现宽频带跟踪的独特优点，其输出信号类似于圆波导单口径多模馈源，具有一个和波束，一个锥形差波束，并给出了没有接收机参与的情况下，将宽频带的和差两个通道变成单通道的途径。研制了一套L(1#61485;2GHz)，S(2.2#61485;2.3GHz)宽频带双圆极化单通道单脉冲天线，对该天线的照射器、分波器、波束形成网络、单通道变换器等组件和馈源结构集成化设计进行比较详细的介绍。该馈源安装到一个3.2m的抛物面上，频率为1.1GHz，2.2GHz时，和波束增益分别为22.9dB，30.1dB；差波束零深为35dB，40dB。在L/S两个频段内跟踪稳定。Abstract: A monopulse reflector antenna with an illuminator of six elements circular array is studied. The antenna has features of broadband and dual circular polarization performance. The output signals of the antenna are similar to multimode circular waveguide feed with one sum pattern and one difference pattern. The method for conveting the two channel signals to one channel signal is provided. The six log-periodic monopole antennas (LPMA) illuminator, diplexer, beam form network (BFN), single channel modulator (SCM) of a L/S dual band tracking antenna are introduced. The gain of sum pattern of 22.9dB, 30.1dB, zero-depth of difference pattern of 35dB, 40dB at 1.1GHz, 2.2GHz respectively are achieved with a 3.2m reflector. The antenna can auto-tracking beacon stably in the L/S bands.
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