摘要
首先ADS微波仿真软件为平台,对侦察卫星的有效载荷之一——星载天线进行了建模与仿真,天线的输入端为携带了卫星和辐射源方位信息的一束窄带QPSK信号,该信号也是在ADS中产生的。对于星载天线的形式,考虑了目前最常用的三种天线阵列:L阵,十字交叉阵以及均匀圆阵。然后,以五元非均匀L阵列为例,在Matlab中采用了时域鉴相法和长短基线联合估计的干涉仪测向算法,对天线输出的信号进行了DOA估计。最后,通过将估计结果与来波的方位角进行比较,验证了天线建模的正确性。
Modeling and simulating a space - borne Antenna which is considered as an important part of the payloads of reconnaissance satellite based on ADS microwave simulation software. In this model,a narrowband QPSK signal generated by another project in the ADS, carrying the direction information of both the satellite and the radiation source is used as the input. According to the form of the satellite antenna, taking three common arrays into consideration： L - shape array, decussation array and uniform circle array. Then, taking a five- element non- uniform L- shape array as an example,evaluating the direction of arrival by means of a time - domain phase detection method and also an interferometer DOA algorithm using long base- line matched with short one. Eventually, the paper verifies the validity of the antenna model by comparing the simulation results with the actual one.
出处
《现代电子技术》
2009年第9期18-20,24,共4页
Modern Electronics Technique
关键词
ADS
星载天线
非均匀L阵
时域鉴相法
干涉仪
ADS
space - borne antenna
non - uniform L - shape array
time - domain phase detection method, interferometer
