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I understand antenna should have two terminals to emit radio waves like this:

enter image description here

But in whip antenna it has only one pointy terminal, how does it work?

J Boya
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    this is off topic here. but my understanding of a quarter-wave vertical antenna, fed from the bottom is that the other terminal is connected to the ground plane. – robert bristow-johnson Jan 20 '22 at 06:06
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    I’m voting to close this question because antenna design and theory questions are generally electrical engineering, but not signal processing (as commonly understood). Hence, this is off-topic, but might have answers on http://electronics.stackexchange.com ; check whether there's not already an answer to your question there! – Marcus Müller Jan 20 '22 at 12:04

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Whip antennas must work against a ground plane. If it's a whip antenna built into a handheld radio, the radio body (and you) act as the ground plane. If you're building a vertical whip antenna, it's common to provide a ground plane from ARRL:

1/4 wave whip, from ARRL

TimWescott
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