基于ASAAC标准的星载功率分配器研制

为了解决原子钟输出高品质频率标准路数单一的问题，同时针对空间电子系统对高品质频率标准的多路需求，本文基于欧洲联合标准航空电子结构委员会（ASAAC）标准，完成了一款新型星载功率分配器的设计。采用先功分后隔离的设计思路，不仅具备频率基准信号的分发功能，可输出12路高隔离度的频率标准。并且通过增加控制单元并设计机内自测试系统，实现了故障检测及通信功能。通过采用主、备份设计，提高了该产品的可靠性，主备份切换通过OC指令完成。通过采用LRM连接器，实现了模块的快速插拔替换，增强了模块的可维修性。通过理论分析及测量结果，隔离度优于72 dB，输出功率大于6 dBm，谐波优于-62 dBc，杂波优于-90 dBc(200 MHz以内)，验证了该功率分配器的可行性和有效性。

Design And Implementation Of The Space Power Dividers Based On ASAAC Standard

In order to solve the problem that the number of high-quality frequency standard for atomic clock output is too few, and in view of the demand for high-quality frequency standards for space electronic systems, this paper designed a novel space power divider based on the Allied Standard Avionics Architecture Council (ASAAC) standard. The design idea of power division first and then isolation is adopted, it not only has the distribution function of frequency reference signals, which can output 12 frequency standards with high isolation. But also the fault detection and communication functions can be realized by adding the control module and design of the built-in test system. In addition, the module adopts the main and backup design, which improves the reliability of the product. The switch of main and backup is completed by the output compare (OC) instruction. The LRM connector is used to realize the rapid plug-and-pull replacement of the module and enhance the maintainability of the module. Finally, Through theoretical analysis and measurement results, the isolation is better than 72 dB, the output power is greater than 6 dBm, the harmonic is better than -62 dBc, and the clutter is better than -90 dBc (within 200 MHz), which verifies the feasibility and effectiveness of the product.