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In which of the following the feed is provided at the end of the array?

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In which of the following the feed is provided at the end of the array?

(a) Series end fed

(b) Series center fed

(c) Parallel feed

(d) Optical feed systems

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The query is from Phased Array topic in division Phased, Adaptive and Binomial Arrays of Antennas

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The correct answer is (a) Series end fed

Easiest explanation: In series end fed, the radiator is placed at the end of the array and its electrical path length depends on the frequency. In center fed, radiator is provided at the center of the array and has bandwidth similar to the parallel feed network. In parallel feed, a number of radiators are combined into sub-arrays and then to elements in series or center fed.

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