In order to promote the progress of radio frequency(RF)rotary joint technology in China and the development of rotary RF communication systems in various fields,the independent design of RF rotary joint with high and low temperature resistance and dynamic stability has been carried out.The RF rotaryjoint has been designed with a whole temperature range structure and carefully selected materials;according to the influence of high and low temperature thermal expansion and contraction,adjustments have been made to the dimensional tolerances of some parts for mutual fit in order to increase the gap;the use of a dynamically stable inner conductor contact pair compensation structure ensures reliable contact between the contact pair,in order to avoid adverse effects on the service life due to increased axial runout and wear during rotation;the transmission of high-frequency signals is achieved using RF transmission structure and compensation structure.After relevant performance tests,the working temperature of the RF rotary joint reaches-100～100℃,the dynamic change of voltage standing wave ratio is not more than 0.2,the dynamic change of insertion loss is not more than 0.5 dB,and the rotating life is 3 million revolutions,which meets the design requirements of high and low temperature resistance,dynamic stability,and safety and reliability.
关键词
射频旋转关节/旋转射频通信系统/接触副/耐高低温性能/动态稳定性
Key words
radio frequency(RF)rotaryjoint/rotary radio frequency(RF)communication system/contact pair/high and low temperature resistance/dynamic stability
维普
万方数据