Considering a primary radar system, what kind of aerials are used?

Question

ATPL - Airline Transport Pilot license - Radio Navigation - Considering a primary radar system, what kind of aerials are used?

QuizVDS · Accepted Answer

One directional antenna both for transmitting and for receiving.

QuizVDS · Answer

A directional antenna for transmitting, and an omni-directional antenna for receiving.

QuizVDS · Answer

One directional antenna for transmitting and one for receiving.

QuizVDS · Answer

Multichannel

ATPL: Considering a primary radar system, what kind of aerials are used?