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What is the approximate gain of LPDA for best performance?

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What is the approximate gain of LPDA for best performance?

(a) 1 dB to 5 dB

(b) 4 dB to 18 dB

(c) 8 dB to 20 dB

(d) 7 dB to 12 dB

I got this question in unit test.

Origin of the question is Frequency Independent Antenna in portion Frequency Independent Antenna of Antennas

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The correct option is (d) 7 dB to 12 dB

The explanation: For best performance of the LPDA antenna, the gain lies between 7 to 12dB. It is a broadband antenna. LPDA is a wideband antenna and provides gain and directivity combined over a wide band of frequencies.

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