What is the difference between monopole and dipole antenna?

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Using to monopole vertical and horizontal placing antenna does the work of a circular antenna?

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Can anyone explain The overall size of the proposed antenna is only 1.34λ0 × 1.32λ0 × 0.014λ0.?

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Milad Faizollah

This may help:

http://www.antenna-theory.com/antennas/monopole.php

A.C. Marvin

A dipole is a symmetrical device with two identical halves The equivalent monopole comprises one of the halves positioned over a groundplane such that its image in the groundplane replaces the second half.

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https://www.quora.com/What-is-the-difference-between-a-monopole-and-dipole-antenna