Q.

A                      is a device that converts a guided electromagnetic wave on a transmission line into a plane wave propagating in free space.

A. transmitting antenna
B. receiving antenna
C. radar
D. mixer
Answer» A. transmitting antenna
Explanation: a transmitting antenna is a device that converts a guided electromagnetic wave on a transmission line into a plane wave propagating in free space. it appears as an electrical circuit on one side, provides an interface with a propagating plane wave.
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