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What is the ratio of maximum frequency to minimum frequency if the scaling factor is 0.5 for 5 elements LPDA?(a) 16(b) 2(c) 4(d) 8The question was asked in a national level competition.This question is from Frequency Independent Antenna in portion Frequency Independent Antenna of Antennas

Answer»

The correct answer is (a) 16

Explanation: The relation between FREQUENCY ratio and the scaling factor is given by

\(\FRAC{f_{MAX}}{f_{min}} = \frac{1}{τ^{N-1}} \)

\(\frac{f_{max}}{f_{min}} =\frac{1}{τ^{N-1}} =\frac{1}{(0.5)^{5-1}}=2^4=16. \)


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