Radio communication , Physics

Assignment Help:

Production of sound messages by a microphone in a radio station (studio).

1) Audio frequency generation.
2) Generation of r.f. carrier wave.
3) Modulation in a transmitter,
b) 4) Transmitting antenna on a tower,
c) Radio receiver,
5) Receiving antenna,
6) Tuning circuits,
7) Detector (demodulator),
8) Amplifier,
9) Speaker.

Production of sound and modulated waves : In the studio, the music or song is converted into electrical signals using a microphone. These signals are in the audio frequency (a.f) range. An osillator produced suitable r.f. carrier wave.

Radio transmitter or modulator: The a.f. signal and r.f. waves are combined in the transmitter. The modulated (combined) waves are fed for an antenna fixed on a tower. This transmitting antenna broadcasts the modulated r.f. waves into space. 

Radio Receiver: The aerial of a radio receiver receives the modulated waves transmitted by various radio stations. The tuning circuit inside the radio set selects only the desired signal. The detector circuits demodulates the modulated signals. Then the a.f. signal is fed to an amplifier. The amplified electric signals are fed to a speaker and converted into the music or song.

1227_radio communication.png


Related Discussions:- Radio communication

What is a p-n junction, What is a P-N junction? How does it behave under fo...

What is a P-N junction? How does it behave under forward and reverse bias?  Describe with the help of circuit diagrams.

State the law of radioactive decay, State the law of radioactive decay. Sho...

State the law of radioactive decay. Show that radioactive decay is exponential in nature. Does the activity of a radioactive element depend on external physical conditions? La

Must all illuminator have forced ventilation, Must all illuminator have for...

Must all illuminator have forced ventilation? Usually yes, the exception being which with a massive construction that dissipate heat by transfer or radiation.

Define some characteristics of standing waves, (1) Standing pulse can be lo...

(1) Standing pulse can be longitudinal / transverse. (2) The disturbance confined to a particular part among the starting point and reflecting point of the ray. (3) There is

Correspondence limit, Correspondence limit (N. Bohr) The restriction at...

Correspondence limit (N. Bohr) The restriction at which a more general theory decrease to a more specialized theory while the conditions that the specialized theory needs are t

Displacement, How do you calculate the initial velocity?

How do you calculate the initial velocity?

Vectors, How to add Vectors analytically

How to add Vectors analytically

Describe the variation of the radius of bright fringe, Describe the variati...

Describe the variation of the radius of bright fringe of Newton's rings with refractive index of the thin film enclosed between the glass plate and plan-convex lens when observed b

What is elasticity, The characteristic of a body by virtue of which the bod...

The characteristic of a body by virtue of which the body takes its real configuration when external deforming forces are removed is called as elasticity.

Na+ ion is isoelectronic with, Na + ion is isoelectronic with: (1) Li ...

Na + ion is isoelectronic with: (1) Li +                     (2)  Mg +2               (3) Ca +2                                (4) Ba +2 Ans:(b) Mg +2

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd