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RADAR

 
 
Reply Mon 10 Aug, 2015 10:34 pm
a radar uses magnetron as high power RF source. its transmitter emits 300kw RF power at 10% duty factor.if the efficiency of radar transmitter during pulse is 60% and the power required during pulse off period is 1kw. then what is the average power dissipation in radar?
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VJAYADEV
 
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Reply Fri 5 May, 2017 02:07 am
@ankita96,
Hi...

Consider the total power generated by magnetron as XkW. Then 40% of X is 300kW. Which means X is 500kW.
Therefore the total power dissipated at the radar when pulse is on is 500-300=200kW.

Now calculating the average value (Given the duty factor as 10%):
Avg power = 200*0.1+1*0.9 = 20.9kW

Bingo !!
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