Deng G J, Huang W H, Li J W, Ba T, Guo L T, Jiang Y
Science and Technology of High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024, China.
Rev Sci Instrum. 2017 Jan;88(1):014705. doi: 10.1063/1.4974105.
A novel high power X-band ferrite phase shifter (PS) employing the structure of several waveguides connected in parallel is proposed. Each of the waveguides is a phase shift unit utilizing a dual-toroid structure. First, the phase shift unit is designed, manufactured, and tested. The results indicate that the power capacity reaches 115 kW. At this power, the maximum magnetic field strength of ferrite is 7.9 kA/m, beyond which the nonlinear effect of ferrite will occur. On this basis, the PS that consists of four units connected in parallel is designed. According to the threshold of ferrite, the power capacity of the PS can theoretically reach 430 kW. Limited by the maximum output power of the microwave source, the preliminary high-power test results demonstrate that the PS can operate properly at 270 kW. The PS exhibits an insertion loss of 0.82 dB and a maximum differential phase shift of approximately 300° at 9.3 GHz. The return loss of the PS is more than 16 dB from 9.0 to 9.5 GHz.
提出了一种采用多个平行连接的波导结构的新型高功率X波段铁氧体移相器（PS）。每个波导都是利用双环形结构的相移单元。首先，设计、制造并测试了相移单元。结果表明，功率容量达到115千瓦。在此功率下，铁氧体的最大磁场强度为7.9千安/米，超过此值铁氧体将出现非线性效应。在此基础上，设计了由四个单元并联组成的移相器。根据铁氧体的阈值，该移相器的功率容量理论上可达430千瓦。受微波源最大输出功率的限制，初步的高功率测试结果表明该移相器在270千瓦功率下能正常工作。该移相器在9.3吉赫兹时的插入损耗为0.82分贝，最大差分相移约为300°。该移相器在9.0至9.5吉赫兹范围内的回波损耗大于16分贝。
