Which of the following will increase the antenna radiation efficiency?

Use of larger section of conductor

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Providing insulation on conductor

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top loading of antenna

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Any of the above

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Solution

The correct option is C top loading of antenna
The efficiency of an antenna is a ratio of the power delivered to the antenna relative to the power radiated from the antenna. A high efficiency antenna has most of the power present at the antenna's input radiated away.
Hence top loading of antenna will increae the antenna radiation efficiency.

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