S波段高功率窗型水负载的设计
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摘要
磁控管是一种输出功率大、效率高,而成本较低的微波真空电子器件,广泛应用于雷达、电子对抗、工业加热等电子系统。其中,工作在S波段2450 MHz频率的连续波磁控管最大输出功率30kW,广泛应用于工业加热系统。为了满足S波段磁控管大功率微波测试的需求,本文设计了一种新的S波段50kW大功率窗型水负载。该水负载采用高密度Al2O3陶瓷片作为微波辐射窗,具有功率容量大、频带宽、体积小、重量轻、结构紧凑等优点,既可用于磁控管、速调管等微波真空电子器件的大功率测试,也可作为微波电子系统中传输功率或反射功率的吸收匹配负载。仿真计算结果表明,S波段水负载在2200~2900 MHz频率范围内电压驻波比小于1.15,在2450±50 MHz频率范围内电压驻波比小于1.06,在2860±50 MHz频率范围内电压驻波比小于1.05。
As a kind of high power,high efficiency and low cost microwave vacuum electronic device,magnetron has been widely used in radar,electronic countermeasure and industrial heating system.The magnetron operating at 2450 MHz with maximum CW output power of 30 kW is widely used in industrial heating system.An S-band window-type water load with tolerance of 50 kW is designed for high power magnetron test.Using Al2O3 ceramic as RF windows,the water load has advantages of high power tolerance,wide bandwidth,small size,light weight and compact structure,which can be used in tests of high power microwave electronic devices such as magnetron and klystron.According to simulation results,the VSWR(voltage standing wave ratio)of water load is optimized to be less than 1.15 in the frequency range from 2200 MHz to 2900 MHz,1.06 in 2450±50 MHz,and 1.05 in 2860±50 MHz.
As a kind of high power,high efficiency and low cost microwave vacuum electronic device,magnetron has been widely used in radar,electronic countermeasure and industrial heating system.The magnetron operating at 2450 MHz with maximum CW output power of 30 kW is widely used in industrial heating system.An S-band window-type water load with tolerance of 50 kW is designed for high power magnetron test.Using Al2O3 ceramic as RF windows,the water load has advantages of high power tolerance,wide bandwidth,small size,light weight and compact structure,which can be used in tests of high power microwave electronic devices such as magnetron and klystron.According to simulation results,the VSWR(voltage standing wave ratio)of water load is optimized to be less than 1.15 in the frequency range from 2200 MHz to 2900 MHz,1.06 in 2450±50 MHz,and 1.05 in 2860±50 MHz.
引文
[1]王文祥.微波工程技术[M].北京:国防工业出版社,2009.
[2]Eves E,Yakovlev V.Analysis of Operational Regimes of a High Power Water Load[J].Journal of Microwave Power&Electromagnetic Energy,2002,37(3):127-144.
[3]丁海兵,丁耀根,古学春,等.大功率微波水负载的研制[C].真空电子学会第17届学术年会,中国:宜昌,2009:80-83.
[4]丁耀根.大功率速调管的设计制造和应用[M].北京:国防工业出版社,2010.
[2]Eves E,Yakovlev V.Analysis of Operational Regimes of a High Power Water Load[J].Journal of Microwave Power&Electromagnetic Energy,2002,37(3):127-144.
[3]丁海兵,丁耀根,古学春,等.大功率微波水负载的研制[C].真空电子学会第17届学术年会,中国:宜昌,2009:80-83.
[4]丁耀根.大功率速调管的设计制造和应用[M].北京:国防工业出版社,2010.