Extensible cascade imaging radar

According to the extensible cascade imaging radar provided by the utility model, synchronous clocks can be provided for all the radio frequency units through the synchronous clock source arranged on the processor unit, and the synchronous clock phase shifters are arranged in the radio frequency units and are used for finely adjusting the synchronous clocks, so that more accurate in-phase clocks can be obtained, and the expandability of the radar is improved. Therefore, clock synchronization among a plurality of radio frequency units is realized, namely antenna coupling among the radio frequency units is realized, inter-board cascade connection is realized, the number of testable points is greatly increased through antenna coupling among the radio frequency units, and the expandability of the system is enhanced. 本实用新型提供一种可扩展级联成像雷达，通过处理器单元上设置的和同步时钟源，能够给所有的射频单元提供同步时钟，且在射频单元内设有同步时钟移相器，并用于对同步时钟的微调，以获得更精准的同相位时钟，从而实现多个射频单元间的时钟同步，即实现了射频单元之间的天线耦合，从而实现板间级联，而且通过射频单元之间天线耦合大幅度增加可测试点数，增强了系统可扩展性。