Average power handling capability

[bkd]

hi evveryone
I have a question about this problem.
i sesign radar with the peak power 5.6 KW, pulse width 2 us, frequency 400 Hz. So as I calculated, the average power is 56000*2*e-6*400=4.48 W.
I intend to design using microstrip line with FR4 subtrate. So do you feel that can widstand that kind of power

 

[FvM]

You didn't mention the operating frequency, but I think a low Er RF substrate would be safer. You should particularly fear partial discharges at the micro strip edges. If you also intend resonant structures (filters) possible sparkovers should be considered.

 

[bkd]

Thank .
The operating frequency is at 1.5 Ghz (1500 Mhz)

 

[radiohead]

I would use a thick substrate to minimize the chance of discharge. Check the specs of the substrate material thoroughly before doing the design.