Electronics and Communication Engineering - Exam Questions Papers

Efficiency of antenna

Power gain = 10

Thus directivity .

Since autocorrelation function and power spectral density bears a Fourier transform relation, then since required in frequency domain will five rectangular convolutions in time domain thus it is triangular function.

s = x² - e^x

x(t) = cos t.

A_C cos ω_ct + 2 cos ω_mt cos ω_ct

A_C cosω_ct

for envelope detection μ < 1 ⇒ < 1 ⇒ A_c should be at least-2.

2^{n - 1} R = 32 K&Omeg;

n = 4

⇒ 8R = 32

R = 4 KΩ.