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Which of the following feed techniques the reflect array used particularly?

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Which of the following feed techniques the reflect array used particularly?

(a) Space feed

(b) Constrained feed

(c) Parallel plate feed

(d) Sub array

The question was posed to me in an online interview.

I want to ask this question from Phased Array in section Phased, Adaptive and Binomial Arrays of Antennas

1 Answer

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Best answer
Right answer is (a) Space feed

The best explanation: In space feed, the energy is distributed to the lens array in a manner analogous to point feed illuminating a reflect antenna. In constrained the power is divided into many elements under different steps. In optical feed systems power is divided in one step. Parallel plate feed uses microwave structure principles and provides efficient power division.

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