波导等离子体限幅器中气体的选择与触发条件计算
Gas selection and calculation of its breakdown field for plasma waveguide limiter
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摘要: 为保护电子设备不受高功率微波损坏，在矩形波导中嵌入等离子体限幅器。计算了不同气体的微波击穿场强随气体压强以及微波频率的变化规律。在高气压条件下（1 333~133 320 Pa），气体击穿场强随气压增大而增大，在计算的4种气体中Ne的击穿场强最小；低气压条件下（1.333 2~133.32 Pa），气体击穿场强随气压增大而减小，且Xe具有最小击穿场强。高气压条件下气体的击穿场强明显高于低气压下的击穿场强。计算结果表明：当填充133.32 Pa的Xe时，限幅器能够在约30 km范围内，有效地防护10 GW级高功率微波对电子设备的损坏。Abstract: To protect electronic systems against high power microwave, a plasma waveguide limiter is presented. The threshold breakdown electric fields of He, Ne, Ar, Xe and H2, which are filled in the limiter, are deduced as a function of gas pressure and microwave frequency. Under high pressure (1 333~133 320 Pa), the breakdown fields increase as pressure increases, and Ne has the lowest breakdown field compared with the other gases. Under low pressure (1.333 2~133.32 Pa), the breakdown fields decrease as pressure increases, and Xe has the lowest breakdown field. The breakdown field of gases under high pressure is higher than that of gases under low pressure. The calculation results show that the limiter filled with Xe with pressure about 133.32 Pa can protect the electronic systems against high p
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Key words:
- high power microwave /
- waveguide /
- plasma limiter /
- breakdown field
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