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

Determine phase of vibration of two vibrating particles, Two vibrating part...

Two vibrating particles that are "out of phase" differ in the phase of their vibration by: a) 1/4 cycle b) 1/2 cycle c) 3/4 cycle d) 1 cycle Ans: Two vibra

Zeroth law of thermodynamics, Zeroth law of thermodynamics If two bod...

Zeroth law of thermodynamics If two bodies are each in thermal equilibrium along a third body, then all of the three bodies are in thermal equilibrium along with each other.

Define the principle and working of an a.c. generator., Define, with the he...

Define, with the help of diagram, the principle and working of an a.c. Generator. Write the expression for the e.m.f. generated in the coil in terms of its speed of rotation

Define thermal conductivity, In solids, heat is move from conduction. We wi...

In solids, heat is move from conduction. We will study conduction of heat energy by a solid bar in the following section. Given a solid bar of thickness and area of cross-sectio

Illustrate the current-voltage characteristic curves, Illustrate the curren...

Illustrate the current-voltage (I-V) characteristic curves if a junction diode in reverse and forward bias.

Clamper, assignment of clamper

assignment of clamper

Expermient of laboratory steelyard, Laboratory steelyard To make a stee...

Laboratory steelyard To make a steelyard weighing to 500 g use a wooden lath only one metre long balanced on a strong sewing needle stuck by it 3mm from its upper edge and 12 c

Define ultimate strength , The stress at which the specimen breaks or reptu...

The stress at which the specimen breaks or reptures ultimately is known as ultimate strength. We also called this TENSILE STRENGTH .

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