Advertisements
Advertisements
Question
Write, giving a reason, the frequency range used in this mode of communication of propagation.
Solution
In the frequency range 30 MHz to 1000 Mhz, the wavelengths are in the range of 30 cm to 10 m. At these wavelengths the diffraction of waves is high and the waves lose their directional property. So frequency range of 5.925 - 6.425 GHz is used in satellite communication.
APPEARS IN
RELATED QUESTIONS
Draw a neat, labelled block diagram for a generalised communication system.
Name the essential components of a communication system.
Explain briefly two commonly used applications of the ‘Internet’.
Any device that converts one form of energy into another is termed as ______.
(A) amplifier
(B) transducer
(C) receiver
(D) demodulator
For efficient radiation and reception of signal with wavelength λ, the transmitting antennas would have length comparable to ______.
(A)`lambda` of frequency used
(B)`lambda/2` of frequency used
(C )`lambda/3` of frequency used
(D)`lambda/4` of frequency used
Write the functions of each of the following in communication system : Channel
Distinguish between a transducer and a repeater.
What is the line of sight communication?
Mention the function of any two of the following used
(i) Transducer
(ii) Repeater
(iii) Transmitter
(iv) Bandpass Filter
A transmitting antenna of height h and the receiving antenna of height 45 m are separated by a distance of 40 km for satisfactory communication in line of sight mode. Then the value of h is (given radius of the earth is 6400 km):