Reply to thread

Hello everybody,

I try to study the power handling of RF waveguide components, i begin with a standard waveguide WR112 at 8.4GHz, i calculate the power breakdown using the formula in Pozar's book

[ATTACH=full]198264[/ATTACH]

Where Ed is the breakdown voltage of air that fills the waveguide and equal to 3*10^6 V/m.

I find using this formula that for a WR112 at f = 8.4 GHz the Pmax is 1.65MW, and if i put this value of power in the source window in HFSS, then in the plot of E field i find exactly 3*10^6 V/m as the maximum value.

[ATTACH=full]198266[/ATTACH]

But there is a problem, when i use the Multipactor Setup in HFSS on the same waveguide and frequency, the setup solution is that the breakdown power is around 15 kW, someone can help me?

Sorry for my bad english