A novel V-shaped microstrip meander-line slow-wave structure was investigated to expand the operating bandwidth. The high frequency characteristics of V-shaped structure and traditional N-shaped and U-shaped structures were analyzed by electromagnetic simulation software HFSS, and the effects of different structural parameters on the high frequency characteristics were studied. The results show that the V-shaped structure provides better performance in operation bandwidth and interaction impedance than traditional structures, and when the dielectric rod replaces the dielectric slab the performance further improves.
The flow passage including supply hole of externally pressurized gas was investigated. The outlet velocity of supply hole, bearing number and supply pressure’s relationship were built. According to supply hole’s speed, supersonic or subsonic model was chosen to calculate bearing clearance’s pressure distribution. Bearing number’s effects on pressure’s distribution was also studied. The calculation result shows that at larger bearing number, supply hole’s speed is harder to be chocked. Both in supersonic and subsonic condition, larger bearing number produces lower pressure loss.
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