摘要
针对高精度跟踪用户目标的需求,设计了一种Ka频段卫星天线多模单脉冲馈源。该馈源由和差网络、多模激励器和辐射喇叭组成,当从和差端口分别以TE10模激励时,多模激励器会激励出所需的11个工作模,由辐射喇叭在空间形成单脉冲和、差波束。对该馈源在和、差状态下的辐射特性进行仿真分析,结果表明,其和差矛盾小于2.5dB,差零深小于-40dB,同时馈源在方位面和俯仰面的辐射方向图具有良好的对称性。
Considering the requirements to track the target terminal with high precision, a kind of Ka-band high performance multimode monopulse feed is design. This monopulse feed consists of a sum-difference network, a multimode actuator and a horn. When driving in the sum-difference ports in TEl0 mode respectively, the multimode actuator can excite the desired eleven higher-or- der modes and the horn generates the monopulse sum and difference beams in space. According to the analysis results of the sum and difference radiation patterns, the gain difference between sum and difference channels is less than 2.5dB, and the zero-depth of difference pattern is less than --40dB. Besides, a good performance in both the elevation and the azimuth plane is achieved.
出处
《航天器工程》
2014年第2期95-99,共5页
Spacecraft Engineering
