Discussion
What is a monopulse antenna arrangement used for?
Answer: B
Monopulse forms a sum pattern and a difference pattern simultaneously, and the ratio of their outputs gives the angular error from a single pulse, without the sequential lobing that earlier trackers needed. The sharp null of the difference channel is what provides the accuracy. It says nothing about peak power, does not imply a single lobed pattern, and duplexing between transmit and receive is a separate function performed by a circulator or switch. Working one numerical case through both cases side by side fixes the distinction better than any rule of thumb.
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