In a super-heterodyne receiver having no RF amplifier, the loaded Q of the antenna coupling circuits is 100.

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written 6.2 years ago by

teamques10 ★ 69k

• modified 6.2 years ago

If the IF is 455KHz calculate : i)The frequency and its rejection ratio for the tuning at 1044MHz ii) The image frequency and its rejection ratio for the tuning at 30MHz.

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written 6.2 years ago by

teamques10 ★ 69k

Given :

Super Hetrodyne receiver loaded Q of antenna coupling circuit = 100

Image frequency (f i) = 455 KHz

To Find :

i) Image frequency and rejection ratio for tunning 1044 MHz

$\rightarrow f_{si} = f_s + 2f_i$

= 1044 + 2 x 0.455 = 1044.91

$f = \frac{f_{si}}{f_s} …

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