【摘要】 随着干扰的日益增多,卫星阵馈反射面赋形波束天线通常希望具有尽可能低的旁瓣电平。然而,当馈元阵口径面面积有限时,窗口效应往往会使这种天线具有较高的旁瓣电平。本文在阵馈反射面天线频域方向性相乘原理的基础上,对这种窗口效应形成的原因和产生的影响进行了分析,并提出了两种能够减小这种窗口效应的窗口函数,最后用一个实际阵馈反射面天线的仿真计算结果证明了这两种窗口函数的有效性和优越性。更多还原

【Abstract】 Due to the increase of interference,array-fed reflector satellite shaped-beam antennas are required to have the lowest sidelobe levels.However,it is often difficult to realize this due to the window effects when the feed array has a finite-area aperture.Thus in this paper,based on the frequency-domain principle of pattern multiplication,the cause and results of the window effects are analyzed and two window functions are presented to reduce the window effects.Simulation results of a concrete array-fed reflector antenna verify the effectiveness of the two window functions.更多还原