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 Antennas 20 Flashcards |
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What is the primary function of an antenna in communication systems? |
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To transmit and receive electromagnetic signals. |
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Fill in the blank: The effective aperture of an antenna is related to the ______. |
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Power received by the antenna. |
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True or False: A monopole antenna radiates power in both the upper and lower hemispheres. |
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False. A monopole antenna radiates power only in the upper hemisphere. |
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Which type of antenna is known for its wide bandwidth and omnidirectional characteristics? |
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Bow-Tie Antenna |
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Riddle: I can capture signals from a satellite, my shape is often parabolic, what am I? |
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Parabolic Reflector Antenna |
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Fill in the blank: The parameter that measures how concentrated the power radiation of an antenna is in a specific direction is called ______. |
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Directivity |
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True or False: All antennas have the same radiation pattern regardless of their design. |
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False. Different antennas have distinct radiation patterns based on their design. |
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What is the major disadvantage of rectangular microstrip antennas? |
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They have inefficient and very narrow bandwidth. |
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Which antenna type is designed to operate over a wide range of frequencies with a logarithmic spacing of elements? |
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Log-Periodic Dipole Array |
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Fill in the blank: Antenna gain is defined as the ratio of ______ to the power radiated by a reference antenna. |
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Power radiated by the antenna |
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