101. An antenna that is circularly polarized is the—

1. 1. Helical

   
   
   

   2. Small circular loop

   
   
   

   3. Parabolic reflector

   
   
   

   4. Yagi-Uda

   
   
   

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   An antenna that is circularly polarized is the helical.

   Correct Option: A

   An antenna that is circularly polarized is the helical.

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102. Which one of the following terms does not apply to the Yagi-Uda array?

1. 1. Good bandwidth

   
   
   

   2. Parasitic elements

   
   
   

   3. Folded dipole

   
   
   

   4. High gain

   
   
   

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   NA

   Correct Option: D

   NA

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103. Indicate which one of the following reasons for the use of an earth mat with antennas is false—

1. 1. Impossibility of a good ground connection

   
   
   

   2. Provision of an earth for the antenna

   
   
   

   3. Protection of personnel working underneath

   
   
   

   4. Improvement of the radiation pattern of the antenna

   
   
   

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   NA

   Correct Option: C

   NA

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104. Indicate the antenna that is not wideband—

1. 1. Discone

   
   
   

   2. Folded dipole

   
   
   

   3. Helical

   
   
   

   4. Marconi

   
   
   

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   NA

   Correct Option: D

   NA

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105. Indicate which of the following reasons for using a counterpoise with antennas is false?

1. 1. Impossibility of a good ground connection

   
   
   

   2. Protection of personnel working underneath

   
   
   

   3. Provision of an earth for the antenna

   
   
   

   4. Rockiness of the ground itself

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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