Electronics and Communication Engineering - Radio Receivers - Discussion

Discussion :: Radio Receivers - Section 1 (Q.No.30)

30. 

As compared to tuned radio frequency receivers which of the following is the advantage of using superheterodyne receivers?

[A]. High gain and better sensitivity
[B]. Better selectivity at high frequencies
[C]. Stability
[D]. Noise suppression

Answer: Option A

Explanation:

No answer description available for this question.

Rahul Kushwaha said: (Jul 23, 2016)  
Please explain it.

Libobetje said: (Jul 20, 2017)  
In, Superheterodyne the reciever here are the sections ARMIDAS.

= Antenna Rf(amplifier) Mixer If(amplifier) Demodulator or detector Af amplifier Speaker.

In the superheterodyne the If section consists of a series of If amplifiers and bandpass filter
bandpass filter = only desired or required frequency can allow to enter and reject other frequency and all signal frequencies are converted typically to a constant lower frequency before detection the IF center frequency and bandwidth are constant for all stations, the standard IF frequency which is 455khz.

While in the Tune Radio Frequency the sections are
ARDAS = Antenna Rf(amplifier) Demodulator Af(amplifier) Speaker
TRF receivers suffered from poor selectivity, since even filters with a high Q factor have a wide bandwidth at radio frequencies, with multi stage amplifiers TRF also have no IF stage.

Anom said: (Apr 22, 2019)  
Thanks @Libobetje.

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