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The geometrical design of the Log periodic depends on _____

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The geometrical design of the Log periodic depends on _____

(a) Scaling factor

(b) Gain

(c) Impedance

(d) Stability

The question was posed to me in final exam.

This interesting question is from Frequency Independent Antenna in division Frequency Independent Antenna of Antennas

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The correct option is (a) Scaling factor

The explanation is: Scaling factor is the ratio of the lengths and spacing’s of the dipoles. It is also called as periodicity factor. If rn  denotes the length of the nth dipole then the scaling factor is given by

Scaling factor = \(\frac{r_n}{r_{n+1}}\)

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