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Paymemoney
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Homework Statement
A 3kW radio signal generator is connected via a transmission line having an attenuation of 0.4 dB/m.
Generator and load impedance are matched to the line.
i) How long may the line be, if the load must receive at least 1kW of power?
ii) How much power is dissipated by the 7th metre of line?
Homework Equations
GAIN=10log(Pout/Pin)
P=vi=v[tex]\hat{}[/tex]2 / Z = i[tex]\hat{}[/tex]2 * Z
A = 32.5[tex]/[/tex]20log10F [tex]/[/tex] 20log10 D
The Attempt at a Solution
i)I used the GAIN formula to determine the power out and then i used the P=v^2/Z to find the impedance.
Line is 2.7x10^-6 long.
And i don't think this is correct, because i don't have any voltage value to input in the P=v^2/Z forumla.
ii)I used the P=v^2/Z to find the power dissipated by the 7th meter of line.
the answer is 38.5x10^-9
Could someone tell me if this is correct.