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Which of the following region is also known as reflective region in LPDA?

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Which of the following region is also known as reflective region in LPDA?

(a) Inactive transmission line region

(b) Active region

(c) Inactive stop region

(d) Log periodic array

I had been asked this question in final exam.

The doubt is from Frequency Independent Antenna in section Frequency Independent Antenna of Antennas

1 Answer

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Best answer
The correct choice is (c) Inactive stop region

To explain I would say: Inactive stop region \(L > \frac{λ}{2} \)  offers Inductive impedance. Any small incident wave gets reflected easily by large inductive impedance hence this region is also known as reflective region.

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