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高增益、宽带、高指向精度是有源相控阵天线的重要要求,功分网络的幅相分布、带宽、插损等直接影响相控阵天线的性能。设计了工作在K频段、相对工作带宽超过25%的1分24大型功率分配网络。采用基于微带线-波导腔混合技术的功率分配网络,抑制了高频空腔谐振,并使用HFSS软件进行仿真,制作样件进行测试。测试结果表明,在要求工作带宽范围内,网络表现出优良的幅相一致性,端口驻波性能较好,且剖面低、结构紧凑、重量轻,能够满足机载、弹载等环境的应用要求。
High gain, broadband and high pointing accuracy are the important requirements of active phased array antennas. Amplitude and phase distribution, bandwidth and insertion loss of the power distribution network directly affect the performance of the phased array antenna. Designed a work in the K band, the relative working bandwidth of more than 25% of the 1 minute 24 large power distribution network. Using the power distribution network based on microstrip line-waveguide mixing technology, the high frequency cavity resonance is suppressed and simulated by HFSS software to make samples for testing. The test results show that the network shows good amplitude consistency in the required working bandwidth, good port standing wave performance, low profile, compact structure and light weight, which can meet the application requirements of airborne and missile-borne environments .