railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Antennas Basics of Antenna

In a Broadcast superheterodyne receiver having no RF amplifier, the loaded Q of the antenna coupling circuit (at input of mixer) is 100. If the intermediate frequency (IF) is 455 KHz, calculate the image frequency (fsi) and its rejection ratio (α) at 1000 KHz.

1
fsi = 1190 KHz and α = 1.386
2
fsi = 1455 KHz and α = 138.6
3
fsi = 1910 KHz and α = 1.386
4
fsi = 1910 KHz and α = 138.6
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