Q.

Which of the following antennas produce a vertical radiation pattern?

A. dipole antenna
B. yagi antenna
C. marconi antenna
D. hertz antenna
Answer» C. marconi antenna
Explanation: the same effect as dipole antenna can be achieved with a one-quarter wavelength antenna or marconi antenna. a vertical dipole with the doughnut-shaped radiation pattern, in which one-half of the pattern is below the surface of the earth. this is called a vertical radiation pattern.
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