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When the polarisation of the receiving antenna is unknown, to ensure that it receives atleast half the power, the transmitted wave should be
- a)Linearly polarised
- b)Elliptically polarised
- c)Circularly polarised
- d)Normally polarised
Correct answer is option 'C'. Can you explain this answer?
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When the polarisation of the receiving antenna is unknown, to ensure t...
Answer: c
Explanation: The polarisation of the transmitting and receiving antenna has to be the same. This is the condition for maximum power transfer to occur. This is possible only when the polarisation is circular.
Explanation: The polarisation of the transmitting and receiving antenna has to be the same. This is the condition for maximum power transfer to occur. This is possible only when the polarisation is circular.
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When the polarisation of the receiving antenna is unknown, to ensure t...
Circularly polarised waves are used when the polarisation of the receiving antenna is unknown, in order to ensure that it receives at least half the power. This is because circularly polarised waves have the ability to be received by antennas with any type of polarisation.
Linearly polarised waves can only be received efficiently by antennas that are aligned with the same polarisation. If the receiving antenna is oriented differently, it will receive a reduced amount of power. Therefore, using linearly polarised waves would not guarantee that the receiving antenna receives at least half the power.
Elliptically polarised waves have both linear and circular components of polarisation. While they can be received by antennas with different polarisations, the efficiency of reception can vary depending on the type of elliptical polarisation. Therefore, using elliptically polarised waves would also not ensure that the receiving antenna receives at least half the power consistently.
Circularly polarised waves, on the other hand, have a constant power transfer regardless of the orientation of the receiving antenna. This is because circular polarisation consists of two orthogonal linear polarisation components that are 90 degrees out of phase with each other. As a result, the receiving antenna will always receive a consistent amount of power, regardless of its polarisation orientation.
In summary, by using circularly polarised waves, the transmitting antenna ensures that the receiving antenna will receive at least half the power, regardless of its polarisation. This makes circular polarisation the most suitable choice when the polarisation of the receiving antenna is unknown.
Linearly polarised waves can only be received efficiently by antennas that are aligned with the same polarisation. If the receiving antenna is oriented differently, it will receive a reduced amount of power. Therefore, using linearly polarised waves would not guarantee that the receiving antenna receives at least half the power.
Elliptically polarised waves have both linear and circular components of polarisation. While they can be received by antennas with different polarisations, the efficiency of reception can vary depending on the type of elliptical polarisation. Therefore, using elliptically polarised waves would also not ensure that the receiving antenna receives at least half the power consistently.
Circularly polarised waves, on the other hand, have a constant power transfer regardless of the orientation of the receiving antenna. This is because circular polarisation consists of two orthogonal linear polarisation components that are 90 degrees out of phase with each other. As a result, the receiving antenna will always receive a consistent amount of power, regardless of its polarisation orientation.
In summary, by using circularly polarised waves, the transmitting antenna ensures that the receiving antenna will receive at least half the power, regardless of its polarisation. This makes circular polarisation the most suitable choice when the polarisation of the receiving antenna is unknown.
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When the polarisation of the receiving antenna is unknown, to ensure that it receives atleast half the power, the transmitted wave should bea)Linearly polarisedb)Elliptically polarisedc)Circularly polarisedd)Normally polarisedCorrect answer is option 'C'. Can you explain this answer?
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